JP2000250405A - Device and method for displaying map for navigation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change over a display of a residential quarter map to/from that of a road map according to predetermined conditions. SOLUTION: After a destination is selected by a list input, a residential quarter map within the range including the selected destination is automatically displayed on a display. Further, when a range of an image centering the destination, a present position, or a cursor center as the screen center lies off the range of coordinates of the residential quarter map, the residential quarter map is not displayed, but the road map is displayed, instead. Moreover, a map image displayed on a display by manual operation can be switched to either the residential quarter map or the road map (step 120). Moreover, when a present position approaches to a predetermined distance or less from a registered destination TP, the residential quarter map is automatically displayed on the display (step 122). Furthermore, when own vehicle is stopping or runs at a predetermined speed or lower, the display of the residential quarter map is inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device for navigation and a map display method.

[0002]

2. Description of the Related Art As a conventional map display device, there is a navigation device for a vehicle. The navigation device detects a current position and sets a destination using a road map formed on the basis of road information, thereby calculating a route to the destination. Based on the calculated route, This guides the route to the ground.

Further, a map displayed on a display device for the purpose of providing route guidance while the vehicle is running displays a minimum amount of information in order to improve the visibility of the current position and the road on which the vehicle is running. Was something.

However, in the conventional navigation device, since there is little information to be displayed, there is little information for confirming a destination or a point such as a specific facility desired by a user. Therefore, it is complicated to determine the corresponding point. Accordingly, an object of the present invention is to provide a navigation device that displays guidance during traveling and that can easily determine a point.

[0004]

In order to solve the above-mentioned problems, the present invention stores a plurality of map information for forming a plurality of maps having different information for the same area, and stores the map information as input information. A plurality of map information can be searched based on the selected map information, and the corresponding map information can be selected and output from the plurality of map information to output a map around the input point.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Overall Circuit FIG. 1 shows an overall circuit of the navigation device. The central processing unit 1 controls and operates the operation of the navigation device by the CPU 2. The flash memory 3 has a CPU
2, a program necessary for display control and voice guidance control, various parameters, and the like are stored. The RAM 4 stores data input from the outside, various parameters used for calculation, calculation results, and the like.

[0006] The ROM 5 stores a program for operating the information storage device 37 and a program for rewriting the program in the flash memory 3. This R
The OM 5 may store display data for route guidance and map display, a program for display output control and voice output control, various parameters, and the like. The clock 6 generates time information. The sensor input interface 7 receives detection data from the absolute direction sensor 21, the relative direction sensor 22, the distance sensor 23, and the vehicle speed sensor 24 of the current position detection device 20 and sends the data to the CPU 2. The communication interface 8 sends and receives various data to and from a device connected to the data bus 28.

The image processor 9 reads out image data stored in the image memory 10 and outputs the image data to a display 33 such as a CRT, a liquid crystal display, or a plasma display, which can display images. The image memory 10 stores image data displayed on the screen of the display 33 and transmits and receives image data to and from the image processor 9. The image processor 9 converts map data into display data according to a command from the CPU 2 to form image data to be displayed on the screen of the display 33. At this time, the display 33 is used to scroll the screen.
Are also formed and stored in the image memory 10. The ROM 5 stores voice waveform data obtained by recording a synthesized voice for the guidance voice or a real voice. The voice waveform data required by the CPU 2 is read and sent to the voice processor 11. The audio processor 11 forms an analog audio waveform from the input audio waveform data and sends it to the speaker 13.

[0008] The current position detecting device 20 is a device for obtaining data for detecting the current position of the vehicle. The absolute azimuth sensor 21 is, for example, a geomagnetic sensor that detects geomagnetism and outputs data indicating the north-south direction as the absolute azimuth. The relative azimuth sensor 22 outputs data indicating a deviation of the traveling direction of the vehicle from the absolute azimuth detected by the absolute azimuth sensor 21. For example, a gyro device such as an optical fiber gyro or a piezoelectric vibrating gyro, and steering of a wheel. This is a steering angle sensor that detects an angle. The distance sensor 23 is
It outputs data indicating the traveling distance of the vehicle, and is, for example, a digital counter linked to a traveling distance meter. The speed sensor 24 generates a voltage signal or a digital signal proportional to the traveling speed of the own vehicle.

The GPS receiver 25 is a GPS (Global P
ositioning System) signal and outputs position data. The beacon receiving device 26 receives GPS correction data and a beacon from an information providing system such as VICS (Road Traffic Information Communication System) and outputs the received data. The data transmission / reception device 27 transmits and receives information to and from the information providing system using two-way communication such as cellular phone, FM multiplex signal, or telephone line. For example, like ATIS (traffic information service),
The current position information is transmitted / received to / from the information providing system.

The input / output device 30 inputs information necessary for setting a destination, such as a departure point, a destination, and a passing point, and outputs guidance information during a navigation operation. Display 3
On the screen of No. 3, a transparent touch panel 34 is provided. This touch panel has transparent touch switches arranged in a planar matrix. The printer 35
Various types of information such as maps and facility guides output via the communication interface 8 are printed. The information storage device 37 is connected to the I / O data bus 28 via the data transmission / reception unit 39, and reads out programs, data, and the like to be described later.

FIG. 2 shows the contents stored in the information storage device 37. This information storage device 37 stores disk management information. This information is information on data and a program described below, for example, version information of the program.

The information storage device 37 stores a navigation processing program executed by the CPU 2 according to a flowchart described later and a program relating to other processing. These programs are read from the information storage device 37 (external storage means / medium), written and stored in the flash memory 3 (internal storage means / medium) (installed / transferred / copied).

This installation (transfer / copy) is automatically executed when the information storage device 37 is set in the navigation device, automatically when the navigation device is turned on, or when the operator operates the navigation device. Performed by operation. This information storage device 37 can be replaced with another information storage device 37, whereby the program and data are replaced with newer or latest ones. As a result, this replacement provides a modern navigation system.

2. Information storage device 37 (database) The information storage device 37 (database) contains map data, intersection data, node data, road data, photograph data, destination point data, guide point data, detailed destination data necessary for the navigation operation. In addition, display guidance data, voice guidance data, simplified guidance route image data, and the like are stored as destination reading data, house shape data, and other data.
This information storage device is, for example, an IC memory (card), C
It comprises a recording medium such as a D-ROM / RAM, an optical disk, a magnetic disk and the like and a reading device therefor.

The map data file includes a road map data file in which road map data such as a nationwide road map is stored, and a house map data file in which house map data capable of recognizing the shape of a building is stored. ing. The road map and the house map may be constituted by a plurality of maps of different scales for the same area, or may be constituted by a single necessary scale. In this embodiment,
The road map and the house map have a plurality of pieces of map information having different scales as needed for each area, and a description will be given of a device that stores only a specific area as map information for a house map. The road map displays a road network, characters, symbols, figures, and the like indicating locations of main buildings, facilities, and the like, and geographic information such as a map symbol, a geographic name such as a municipal name, and the like.

The house map (building shape map) shows the shape of a house, that is, the shape of an actual building, and also displays geographical information. The house shape represents external information of a building, that is, the shape of an actual building, facility, house, road, river, or the like.
This house shape is displayed, for example, at substantially the same ratio as the ratio of the dimensions of the actual building, or a flat shape of a section, a building, a site, or the like of a section divided in a plane, or a perspective view of a building or the like. , The three-dimensional appearance shape, the two-dimensional shape and the three-dimensional appearance shape are represented by the perspective method. The house shape also includes external features such as the number of floors, area, height, advertising body, and color of the building. The “house shape” is used for convenience of description, but the house shape includes a place other than a house such as a facility site, a road, and a river. These definitions are the same in the following description.

For example, FIG. 3 shows an example of a screen displayed on the display 33 based on the road map data of the most enlarged scale. On a display screen of a road map based on road data, roads are distinguished by lines having different thicknesses and colors. In addition, a symbol mark is displayed at the coordinates where the main building or facility exists. Although not shown, the names of buildings and facilities, the names of main roads, the names of districts, marks for road regulation such as one-way traffic, and the like are displayed.

On the other hand, the house map is, for example, as shown in FIG. 4, a map of a scale further enlarged than the scale of the road map data of the most enlarged scale of FIG. 3, or a map of the same scale. The ratio of the width of each road in the house map is the same as the ratio of the width of the actual road, and there is also a display such as a sidewalk or a pedestrian bridge. In addition, the housing map will show signalized intersections,
Although not shown, map symbols, names of buildings and facilities, names of main roads, district names, indications of road regulations, and the like are displayed.
The house map data is data for displaying such a house map on the entire surface or a part of the display 33.

The intersection data file stores data related to the intersection such as the position and name of the intersection. The node data file stores data of nodes set on the road. The road data file stores data on roads such as the position and type of road, the number of lanes, and the connection relationship between roads. The photograph data file stores image data of photographs of places where visual display is required, such as various facilities, sightseeing spots, and major intersections.

The destination data file includes destinations such as locations and names of places and facilities that are likely to become destinations such as companies or offices described in major tourist destinations, buildings, and telephone directories. Is stored. The guidance point data file stores guidance data of points where guidance such as the contents of a guidance display board installed on a road and guidance of a junction is required. The detailed destination data file stores more detailed data on the destination stored in the destination data file. The destination reading data file stores list data for searching the destination stored in the destination data file from the reading.

In the house shape data file, corresponding to the house map data, house shape data for displaying the house shape and identification data relating to each house shape are stored. Other data files include an address list data file for searching for the destination from the address, a telephone number list data file for searching for the destination from the telephone number, and registration by users such as business partners. There is a data file etc. related to the destination. This house shape data file stores internal information of the building, that is, internal characteristics of the building. The internal features are, in addition to the above-mentioned telephone number and address, a name, a postal code, a field, a business type, a brand, an item, a price, a performance or an actual result.

3. Data Group FIG. 5 shows a part of a data group stored in the RAM 4.
All or a part of the data stored in the information storage device 37 is copied to the external data GD. The current position data MP is the current position data of the own vehicle detected by the current position detection device 20. Absolute bearing data ZD
Is data indicating the north-south direction obtained based on the data from the absolute direction sensor 21. Relative azimuth angle data θ
Is an angle formed by the traveling direction of the host vehicle with respect to the absolute azimuth obtained based on the data from the relative azimuth sensor 22.

The travel distance data ML is the travel distance of the own vehicle obtained based on the data from the distance sensor 23. The current position information PI is data on the current position input from the beacon receiving device 26 or the data transmitting / receiving device 27. VICS data VD and ATIS data A
D is the beacon receiver 26 or the data transmitter / receiver 2
7 is VICS or ATIS data.

The registered destination data TP is data relating to the destination such as the position and name of the destination registered by the user. The guide route data MW is data indicating an optimal route or a recommended route to a destination searched in a route search process (step 52) described later. The traveling speed data MV is the traveling speed of the own vehicle detected by the speed sensor 24. The guidance start point data SP is coordinate data on the map of the start point of the navigation operation determined in the route search process (step 52). Last guide point data E
P is coordinate data on the map of the end point of the navigation operation determined in the route search process (step 52). The house map display flag JF is a flag indicating that it is requested to display a house map on the display 33.

The scale data SD is data indicating the scale of the road map displayed on the display 33. The road map display flag DF is a flag indicating that display of a road map on the display 33 is requested. The destination distance data MD is data on the distance from the current position to the registered destination TP. The manual display flag MF is a flag indicating that the display of the house map on the display 33 by the user's manual operation is requested. The house map display flag HF is a flag indicating whether or not a house map is displayed on the display 33. The data enclosed by the broken line will be described later.

4. House shape data As described above, house map data is provided for municipalities in major cities, and a house map number is assigned to each area. The house shape data is classified according to the house map number, and the house shape data corresponding to the house map number stores shape data, identification data of each place, and the like. As described above, the house shape data is data in which place identification data such as type data, adjacent road data, and detailed data are associated with house shape data. In the present embodiment, the shape data is data representing a planar shape of a section, site, or building of a place partitioned in a plane such as a building or facility existing in a house map.

FIG. 6 shows house shape data of one area in the house shape data file. The house map number data corresponds to the house map number data stored in the map data file. The data number data is the number N of house shapes existing in one area indicated by the house map number. The N house shape data includes type data, shape data, adjacent road data, detailed data,
Other data is included. Among them, the shape data is external information of the building, and the data other than the shape data is internal information of the building.

The type data is classified into data indicating the types of buildings such as public facilities such as government offices, schools, and hospitals, private houses, apartment houses, and detached houses, as well as roads, railways, and rivers. Data indicating the type of place is also included. The shape data is data in which the shape of a house shape is stored in a coordinate sequence, and includes coordinate number data for representing one house shape and coordinate data of each vertex of a planar shape.
For example, as shown in FIG. 7, when the house shape is a hexagon, the coordinates (X0, Y0) to (X5, Y5) of each vertex thereof are obtained.
Is coordinate data representing a house shape. The curve is approximately represented by a fine line segment, and the coordinates of each vertex are used as coordinate data.

The adjacent road data is number data of a road adjacent to the house shape and coordinate data of nodes included in the adjacent road. When there are a plurality of adjacent roads, the adjacent road data includes respective road number data and node coordinate data. The detail data is data representing the details of one house shape. For example, if the type of house shape is a mixed-use building, the detailed data includes the name of the place, for example, the name of the building, the address data of the place, the floor number data of the building, and the company existing in the building. And data on the number of names of departments and departments, and content data on each company and department. The address data is data representing addresses such as prefectures, municipalities, streets, addresses, numbers, large letters, and characters.

The content data includes name data such as company name and department name, telephone number data, division data, classification data, and the like. The division data is data indicating a room number or a floor number. The classification data is data indicating business contents, and the classification is determined, for example, according to the occupation classification in the telephone number book for each occupation. For example, gas stations, restaurants, convenience stores, parking lots, police boxes, pharmacies, banks, post offices, stations, hospitals, schools, cinemas, halls and theaters, live houses, museums, libraries, museums, zoos / aquariums / plants Hall, amusement park, bowling
Skating rink, disco club, karaoke, sports facilities, hotels, inns, lodging, department stores, shopping centers, bookstores, CDs, videos, sports shops, sundries
In addition, classifications such as gourmet, company (general), ... are used. Other data include list image data for displaying detailed data on the display 33, three-dimensional display image data for three-dimensionally displaying the shape of a house shape, data notifying the characteristics of a building, coordinate data of a building entrance, and building data. , The coordinate data of the entrance of the parking lot and the like are included.

5. Overall Processing FIG. 8 is a flowchart of overall processing executed by the CPU 2. This process starts when the power is turned on and ends when the power is turned off. The power on / off may be linked to the on / off of the engine start (ignition). CPU2, RAM at start
4. Initializing the image memory 9 (step 5)
5) is performed. Then, the current position acquisition processing (Step 50), the destination setting processing (Step 51), the route search processing (Step 52), the guidance / display processing (Step 53)
And other processes (step 54) are repeatedly executed.

In the current position acquisition processing (step 50),
The current position of the vehicle is calculated based on the data sent from the current position detecting device 20. In the current position calculation process, the latitude and longitude are calculated from the data input from the GPS receiver 25, and the latitude and longitude are stored in the RAM 4 as the current position data MP. The current position data MP is corrected by information on the current position input from the beacon receiving device 26 or the data transmitting / receiving device 27.

Further, an arithmetic processing for specifying the position of the own vehicle is performed based on the absolute azimuth data ZD, the relative azimuth data θ, and the traveling distance data ML. The position of the own vehicle obtained by this calculation process is compared with the map data in the external data GD, and correction is performed so that the current position on the map screen is accurately displayed. With this correction process, the current position of the vehicle can be accurately obtained even when a GPS signal cannot be received in a tunnel or the like.

In the destination setting process (step 51), a process of setting a destination is performed according to a destination setting operation by a user. For example, when the user performs an operation of selecting the destination setting mode, a road map centering on the current position is displayed on the display 33, and "input list" and "input housing map" are displayed in the road map image. Is displayed. When the user selects the list input mode, an address, a telephone number, a genre,
A menu of search items such as names is displayed, so the user can select any item in the menu,
The destination can be specified from the selected item. Further, detailed guidance of each destination can be displayed. In the house map input mode, a house map around the current position is displayed on the display 33, so that the user moves the cursor to match the destination. In this case, the user moves the cursor so that the center of the cursor is within the range of the desired destination house shape.

After the destination is determined, the user performs an operation of instructing the determination of the destination, and the data relating to the determined destination is stored in the RAM 4 as the registered destination data TP. This destination setting process (step 5)
1) is jumped when a new destination setting operation is not performed.

The destination setting process (step 5)
In 1), when a house map is displayed, the house map is changed to a road map according to a predetermined condition. The change of the map is performed in response to a manual operation of the user or automatically. For example, a road map is displayed when the running speed of the own vehicle is equal to or higher than a predetermined speed, and a house map is displayed when the own vehicle stops or the running speed of the own vehicle becomes equal to or lower than the predetermined speed. When the screen is scrolled while the house map is displayed and the destination or the current position is out of the coordinate range of the house map, the screen is switched to the road map.

In the route search process (step 52), a guide route to the destination is searched based on the registered destination data TP, the current position data MP, and the road data.
Then, the road number data of the roads constituting the guide route are arranged in accordance with the route from the departure point to the destination, and the arranged road number data is stored in the RAM 4 as the guide route data MW. For example, when going from the departure place to the destination, in the destination setting process (step 51), the user designates the destination, and the designated destination is set as a registered destination, and this destination or A point on the guide target road close to the destination is set as the final guide point EP. In addition, the current position is set as the departure point, and a point on the guide target road near the current position or the current position is set as the guidance start point SP.

Then, an optimum route or a recommended route from the guidance start point SP to the final guide point EP is automatically searched. This guide route can select a road successively from the guide start point SP from among the roads sandwiched between the intersections, and can reach the final guide point EP smoothly with the shortest distance and using many main roads. It is such a route. Then, the road number data constituting the guide route is stored in the RAM 4 as the guide route data MW. Note that the guide route search process is equivalent to a process of calculating a road number forming a guide route by a predetermined calculation process based on road data.

The next guidance / display processing (step 5)
If the current position deviates from the guide route during the process 3), the route search process (step 52) is executed in response to a predetermined switch operation or voice input or automatically, and the guide route is executed. Is reset. In this route search process (step 52), if there is no change in the guide route, a jump is made.

In the guidance / display process (step 53), the guidance route obtained in the route search process (step 52) is displayed in the image displayed on the display 33 as red, blue, and other conspicuous bold lines. You. Also, a current position mark indicating the current position and a destination direction mark indicating the direction of the destination with respect to the current position are displayed. The guidance is provided by the speaker 1 so that the vehicle can travel along the guidance route.
From 3, a voice is pronounced or guidance is displayed on the map screen. The image for displaying the guidance route is
It is a road map including geographic information such as roads and facilities around the current position, or a residential map around the current position. In addition,
Instead of the road map, a simplified guide route image that displays only the minimum necessary information such as the guide route, the destination direction, and the current position without displaying the geographic information may be displayed.

When the vehicle approaches a predetermined guide point such as an intersection, an enlarged map of the vicinity of the guide point is displayed, guidance is displayed, and voice guidance is given. Further, the current position is corrected according to the progress of the vehicle, and the map screen is automatically scrolled as the current position moves. Further, in the guidance / display processing (step 53), the displayed image is changed from a road map or a simplified guide route image to a house map, or from a house map to a road map or a simplified guide route image. I do. The change of the map is performed in response to a manual operation of the user or automatically. For example, when the traveling speed of the own vehicle is equal to or higher than a predetermined speed, a road map or a simplified guide route image is displayed. Switching to a house map becomes possible. If the current position coordinates are out of the coordinate range of the house map while the house map is displayed, the display is switched to a road map around the current position or a simplified guide route image. When the registered destination approaches within a predetermined distance, the display may be switched from the road map display or the simplified guide route image to the house map display.

6. Destination Setting Process FIG. 9 shows a flowchart of the destination setting process (step 51). First, it is determined whether or not the own vehicle is stopped (step 60). Specifically, the CPU 2 reads the traveling speed data MV from the RAM 4 and determines whether the traveling speed of the vehicle is 0 km / h or less than a predetermined speed. If it is determined that the vehicle is not stopped, the destination setting process (step 51) ends, and the process proceeds to the next route search process (step 52).

On the other hand, if it is determined in step 60 that the vehicle is stopped, it is next determined whether or not a list entry has been made (step 62). In the list input operation, a destination setting operation is performed using a list corresponding to the search item of the destination. For example, this destination setting processing (step 5
When 1) is started, a road map around the current position is displayed on the display 33, and the characters "LIST INPUT" are displayed in this road map image. When the user touches this display, a touch signal is generated from the touch switch 34, and a list input flag is set according to the touch signal. In step 62, it is determined whether or not this list input flag is set.

In the case of list input, the display 33
A menu for searching for destinations such as "address", "telephone number", and "genre" is displayed. When the user touches the display of the character of the desired item, a touch signal is generated from the touch switch 34, and in response to the touch signal, a flag corresponding to each item such as an address flag, a telephone number flag, a genre flag, etc. Is set. Step 6
In 4-68, it is determined which flag is set. In addition, the character "return" is also displayed in the menu image, and when the character "return" is touched, the destination setting process (step 51) is terminated, and the menu image is displayed on the display 33. The previous road map is displayed. The items in the list input are
The present invention is not limited to the above, and may include a “name”, a “personal name”, or the like of a place such as a company or a facility.

When the user selects any item in the menu image, an input screen corresponding to the selected item is displayed on the display 33 (step 74). This is displayed based on the destination data file and the detailed destination data file. For example,
When the item "address" is selected, the user first selects the name of the prefecture, then selects the name of the city, town, and village, and then inputs the town name and the street, street number, number, and the like. The input of the address is performed by selecting the initials from the Japanese syllabary or by sequentially selecting from the names of prefectures. The user inputs an address by touching the displayed name or number.

When the item "telephone number" is selected, numbers 1 to 0 are displayed. The user touches on the number display and inputs a telephone number. "Genre"
Is selected, a list of names of a plurality of genres is displayed. The user selects a desired genre from the displayed list and touches the display to input the genre. Then, a list of places corresponding to the selected genre is displayed on the display 33 in order of the Japanese syllabary or by prefecture, so that the user selects a desired place. When an input for selecting a specific place to be a destination is performed in this way, a destination is next specified by the user, and the specified destination is stored in the RAM 4 (step 7).
6). Further, the coordinate data of a destination candidate stored in the destination data file is coordinate data of a specific point determined in advance for each location, for example, center coordinates of the site of the location. is there.

On the other hand, when the display of the house map is requested when the destination setting processing (step 51) is started (step 78: YES), the processing for designating the destination in the house map is executed. (Step 80). The processing in step 80 is the same as step 76. The operation by the touch switch 34 is performed by another operation switch or the display 3.
The operation may be replaced with an operation selected by the cursor displayed in 3.

7. Destination Designation Process FIG. 10 is a flowchart of the destination designation process in steps 76 and 80 described above. In this process, if a house map can be displayed, the house map is displayed on the display 33,
A place designated by the cursor is searched based on the house shape data, and the searched place is set as a registered destination TP.
Stored in AM4. Further, detailed information of the location designated by the cursor can be displayed on the display 33.

First, it is determined whether or not there is a house map for designating a destination (step 90). In the case of step 76, it is determined whether there is house map data including the coordinates of the specific place selected in step 74,
In step 80, it is determined whether there is house map data including the coordinates of the current position. When the screen is scrolled, it is determined whether there is house map data including the coordinates of the center of the cursor. For example, if the house map data is a rectangular range, it is calculated whether or not the coordinates of the specific location, the coordinates of the current position, or the coordinates of the cursor center are within the range surrounded by the coordinates of the four vertices of the square. Is done.

If there is house map data including the coordinates of the specific place, the coordinates of the current position, or the coordinates of the center of the cursor, it is next determined whether or not a road map is displayed on the display 33 (step 91). ). This is to determine whether or not the house map display flag HF is off. If the road map is displayed, the scale of the displayed road map is stored in the RAM 4 (step 92). On the other hand, when a house map is displayed on the display 33, this step 92 is jumped. Then, the CPU 2 reads out the house map data around the current position from the house map data file and sends it to the image processor 9. As a result, a house map having the current position as the center of the screen is displayed on the display 33 (step 93). And display 3
Since the house map is displayed in 3, the house map display flag HF is set to ON.

The display of the house map is color-coded according to the type of place, for example, roads and vacant lots are white, individual and company buildings are gray, and public facilities are orange.
Of course, there is no limitation on the criteria for color coding or the displayed colors. When a specific place is selected by a list input, the house map displayed on the display 33 displays the coordinates indicated by the coordinate data stored in the destination data for the selected specific place on the display 33. Is displayed at the center of the screen.

When the house map is displayed on the display 33 (step 93), the cursor KL is displayed at the center of the screen of the display 33, so that the CPU 2 obtains the coordinates of the center of the cursor KL (step 94). Then, a place including the coordinates of the center of the cursor is searched from the house shape data file (step 99). For example, the CPU 2 obtains the coordinates of the cursor center KLC by calculating the center of the coordinate range of the image displayed on the display 33. Then, the house shape data included in the house map displayed on the display 33 is sequentially read from the house shape data file. Cursor center K using the shape data included in the read house shape data
House shape data including LC is retrieved.

For example, from the shape data (X0, Y0) to (X5, Y5) of the house shape HS as shown in FIG.
Coordinates and Y coordinates, and minimum X and Y coordinates are obtained. Then, it is determined whether or not the X coordinate (Xc) of the cursor center KLC is between the maximum X coordinate and the minimum X coordinate. This determination is based on the X coordinate (Xc) of the cursor center KLC.
) Is compared with the maximum X coordinate and the minimum X coordinate. Similarly, the Y coordinate (Y
It is determined whether or not c) is between the maximum Y coordinate and the minimum Y coordinate. Here, the coordinates of the cursor center KLC are between the maximum X coordinate and the minimum X coordinate of the house shape HS,
If it is between the maximum Y coordinate and the minimum Y coordinate, then the gradient of the line segment connecting the coordinates of the cursor center KLC and each coordinate of the house shape HS is calculated.

Then, it is determined whether the cursor center KLC is within the range of the planar shape of the house shape HS by comparing the obtained inclination with the inclination of a line segment forming the outer periphery of the house shape HS. Is done. For example, the inclination of a line connecting the cursor center KLC and the coordinates (X2, Y2) and (X1, Y1)
And the slope of the line segment L2 connecting (X2, Y2) and (X2, Y2).
2) By comparing the magnitude of the inclination of the line segment L3 connecting (X3, Y3), it is determined that the cursor center KLC is between the line segments L2 and L3. Other line segments L1, L4, L5,
The same calculation is performed for L6, so that the line segments L1 to L2 in which the cursor center KLC forms the outer periphery of the house shape HS.
It is determined that it is within the range surrounded by 6.

When the house shape data including the cursor center KLC is searched in this way, it is next determined whether or not the display of the detailed information is requested (step 100).
This determination is made, for example, by detecting whether or not the user has touched the “detailed information” character displayed on the display 33. When the display of the detailed information is requested, the list image data included in the house shape data searched in step 99 is read out by the CPU 2 and sent to the image processor 9 (step 10).
2).

As a result, the contents of the detailed data relating to the location at the center of the cursor are displayed on the display 33 in the form of a list. For example, when the house shape HS is a multi-story building including a plurality of stores and companies,
The name or telephone number of the store or company for each room, the classification of the store or company, and the like are displayed in a list. For example, when the user is looking for a "bookstore", even when this "bookstore" is on the second floor of the building, the list display is convenient because it can be confirmed. On the other hand, if the display of the detailed content is not requested even after the elapse of the predetermined standby time, the process of step 102 is skipped, and the list is not displayed.

Next, it is determined whether a return has been requested (step 104). For example, the display 33
It is determined whether or not the character of "return" displayed in "" has been touched by the user. If a return is requested, the destination designation process (steps 76 and 80) ends, and the process proceeds to the next route search process (step 52).
If there is no return request, then it is determined whether or not a destination registration operation has been performed (step 106). For example, the word “Registration” is displayed on the screen of the display 33, and whether or not the user has touched this display is determined based on the output signal of the touch switch 34. If the registration operation has been performed, the house shape data retrieved in step 99 is stored in the RAM 4 as the registered destination data TP (step 108).

When the registration operation is not performed, when the user moves the cursor KL to change the destination, a screen scrolling process (not shown) is performed by interruption, and the map image displayed on the display 33 is scrolled. Is done. The map image displayed on the display 33 is scrolled so that the cursor center KLC always becomes the screen center. When the scrolling stops, the process returns to step 90, where the coordinates of the cursor center KLC are obtained (step 94), and a search is made for house shape data including the cursor center KLC (step 99). Then, when the display of the detailed information is requested, a list display of the detailed information is performed (steps 100 and 102). If the range of the house map displayed on the display 33 is interrupted by scrolling the screen, that is, if the range of the coordinates displayed on the display 33 is outside the coordinates of the edge of the house map data, step 90 is executed. Is NO, and the display is switched to a road map display with the coordinates of the cursor center KLC at the center of the screen (step 9).
7).

On the other hand, if there is no house map data including the coordinates of the specific place, the coordinates of the current position, or the coordinates of the center of the cursor in step 90, the display 3
It is determined whether or not a house map is displayed in 3 (step 95). This is to determine whether or not the house map display flag HF is on. Here, if the road map is already displayed, there is no need to switch the display mode of the map, so the next step 96 is jumped. On the other hand, when a house map is displayed, the display mode is switched to a road map display mode. At this time, when the display mode of the road map is switched to the display mode of the house map, the reduced scale data S stored in the RAM 4 in step 92 is displayed.
D is read (step 96).

Then, the CPU 2 reads out road map data around the current position from the road map data file of a scale corresponding to the scale data SD and sends it to the image processor 9. As a result, a road map having the coordinates of the specific place, the current position, or the center of the cursor as the center of the screen is displayed on the display 33 (step 9).
7). Then, since the road map is displayed on the display 33, the house map display flag HF is reset to off. When the road map is displayed on the display 33, the cursor KL is displayed at the center of the screen of the display 33, so that the coordinates of the cursor center KLC are obtained by the CPU 2 (step 98).

Next, it is determined whether or not a return has been requested (step 104). If a return has been requested, the destination designation processing (steps 76 and 80) ends, and the next route search is performed. Go to processing (step 52). If there is no return request, it is determined whether or not the destination has been registered next (step 106). If the registration operation has been performed, the coordinates of the cursor center KLC searched in step 98 are determined. The indicated position is stored in the RAM 4 as the registered destination data TP (Step 108). When the registration operation is not performed and the user changes the designated position of the destination by moving the cursor KL, the above-described screen scroll processing is performed, and the map image displayed on the display 33 is scrolled. Then, when the scrolling stops, the process returns to step 90, and the coordinates of the cursor center KLC are obtained (step 98). If the screen of the screen allows the display of the house map with the cursor center KLC at the center of the screen in the coordinate range displayed on the display 33, the determination in step 90 becomes YES, and the coordinates of the cursor center KLC are set to the center of the screen. The display is switched to the display of a house map (step 93).

8. Map Switching Process FIG. 11 shows a flowchart of the map switching process (step 110) executed in the guidance / display process (step 53). In this process, a manual operation process (step 120), a destination proximity switching process (step 122), a house map switching process (step 124), and other processes (step 126) are performed. In the manual operation process (step 120), switching between a mode for displaying a house map and a mode for displaying a road map is performed according to a manual operation by the user. In the destination proximity switching process (step 122), when the registered destination approaches within a predetermined distance, the display mode of the road map is switched to the display mode of the house map.

In the house map switching process (step 124), the traveling speed of the own vehicle becomes equal to or lower than the predetermined speed, or the display of the house map is permitted when the vehicle stops, and the driving speed of the own vehicle becomes higher than the predetermined speed. When the vehicle is running, display of the house map is prohibited. When the house map around the current position displayed on the screen of the display 33 disappears,
A road map is displayed. Other processing (step 12
In 6), the display mode of the house map and the display mode of the road map are switched based on other switching conditions.

9. FIG. 12 shows the manual operation processing (step 12) in FIG.
It is a flowchart of 0). First, it is determined whether or not switching by manual operation of the user has been performed (step 130). For example, the CPU 2 determines whether or not an operation of a switch for switching a screen display mode is performed. Further, by operating the changeover switch, it is determined whether the display of the house map is requested or the display of the road map is requested (steps 132 and 14).
2).

If the display of the house map is requested, it is next determined whether or not the image displayed on the display 33 is a house map (step 13).
4). This is to determine whether or not the house map display flag HF is on. The house map display flag HF is set to ON when a house map is displayed on the display 33, and is reset to OFF when a road map is displayed. In addition, this house map display flag HF
Is reset to off in the initialization processing.

If the house map is already displayed, there is no need to switch the map display mode, and the manual operation process (step 120) ends. On the other hand, when the road map is displayed, the housing map display flag JF
Is set to on (step 136), and the road map display flag DF is reset to off (step 13).
8). The house map display flag JF is set to ON when displaying a house map on the display 33, and is reset to OFF when a road map is displayed. The road map display flag DF is set to ON when a road map is displayed on the display 33, and is reset to OFF when a house map is displayed. In the initialization processing, the house map display flag JF is reset to off, and the road map display flag DF is set to on.

When the house map display flag JF is set to ON and the other conditions are satisfied in a house map switching process (step 124) described later, a house map is displayed on the display 33. Then, the manual display flag MF is set to ON (step 14).
0). The manual display flag MF is a flag for storing that the display of the house map is requested by the manual operation, and is reset to OFF when the display of the road map is requested by the manual operation (step S1). 150).

On the other hand, when the user operates the display mode changeover switch to request the display mode of the road map, next, it is determined whether or not the image displayed on the display 33 is the road map. Is determined (step 144). This is to determine whether or not the house map display flag HF is off. If the road map has already been displayed, there is no need to switch the map display mode, and the manual operation process (step 120) ends. On the other hand, when the house map is displayed, the road map display flag DF is set to ON (step 14).
6), the house map display flag JF is reset to off (step 148). When the road map display flag DF is set to ON and other conditions are satisfied in the later-described house map switching process (step 124),
A road map is displayed on the display 33. Then, the manual display flag MF is reset to off (step 150).

10. FIG. 13 shows a destination approach switching process (step 12) in FIG.
It is a flowchart of 2). In this process, when the distance between the current position and the registered destination is within a predetermined distance,
A process of displaying a house map on the display 33 and guiding the registered destination in the house map is performed. If the distance between the current position and the registered destination is longer than a predetermined distance, a road map is displayed on the display 33.

First, the current position data MP and the registered destination data TP are read from the RAM 4 by the CPU 2 (steps 160 and 162). Then, by calculating the difference between the coordinates of the current position and the coordinates of the registered destination, the straight-line distance from the current position to the registered destination is obtained and stored in the RAM 4 as the destination distance data MD (step 16).
4). Instead of the straight-line distance, the length of the route from the current position MP to the final guide point EP via the guide route MW may be obtained.

Next, it is determined whether or not the distance from the current position to the registered destination has approached within a predetermined distance (step 168). For example, it is determined whether the destination distance MD is equal to or less than the reference distance SL. The reference distance SL is a distance considered to be suitable for displaying route guidance on a house map since the current position has approached the destination, and is stored in the flash memory 3 in advance. Here, MD ≦ SL
If so, it means that the current position has approached the destination, and a process for displaying a house map on the display 33 is performed. First, it is determined whether or not a house map is displayed on the display 33 (step 170). This is to determine whether or not the house map display flag HF is on. If the house map is already displayed, there is no need to switch the map display mode, so this destination approach switching process (step 122) ends. On the other hand, when a road map is displayed, the house map display flag JF is set to on (step 172), and the road map display flag DF is reset to off (step 17).
4). When the house map display flag JF is set to ON, a house map switching process described later (step 12)
If the other conditions are satisfied in 4), the display 3
A house map is displayed in 3.

On the other hand, the destination distance MD is equal to the reference distance SL.
If it is longer, the determination in step 168 is NO, and processing for displaying a road map on the display 33 is performed. After step 168, it is determined whether or not the manual display flag MF is off (step 1).
76). If the user has requested the display of the house map in the manual operation process (step 120), it is necessary to give priority to this user request. Therefore, when the manual display flag MF is on,
The display mode of the house map is continued.

If it is determined in step 176 that the manual display flag MF is off, then it is determined whether or not the image displayed on the display 33 is a road map (step 178). . This is to determine whether or not the house map display flag HF is off. If the road map has already been displayed, there is no need to switch the map display mode, so the destination approach switching process (step 122) ends. On the other hand, when the house map is displayed, the road map display flag DF is set on (step 180), and the house map display flag JF is reset off (step 182). When the road map display flag DF is set to ON and other conditions are satisfied in the house map switching process (step 124) described later, a road map is displayed on the display 33.

11. Housing Map Switching Process FIG. 14 shows a housing map switching process (step 12) in FIG.
It is a flowchart of 4). In this processing, when the house map display flag JF is set to ON in the manual operation processing (step 120) and the destination approach switching processing (step 122), the house map is displayed on the display 33, and the road map display flag DF Is set to ON, a road map is displayed on the display 33. Also,
When the running speed of the own vehicle is lower than the predetermined speed or when the vehicle stops, a house map can be displayed. When the running speed of the own vehicle is higher than the predetermined speed or the vehicle is running, the display of the housing map is prohibited. Is done. Further, when the house map around the current position displayed on the screen of the display 33 disappears, a road map is displayed.

First, the CPU 2 determines whether or not the house map display flag JF is on (step 1).
90). If this house map display flag JF is on,
The house map can be displayed, and the condition is further determined. First, the traveling speed data MV is read from the RAM 4 by the CPU 2 (step 192). Then, it is determined whether or not the own vehicle is stopped based on the traveling speed data MV (step 194). Specifically, it is determined whether the traveling speed of the vehicle detected by the vehicle speed sensor 24 is 0 km / h or less than a predetermined speed. Here, when it is determined that the own vehicle is stopped, it is possible to display a house map, and then it is determined whether or not a house map around the current position can be displayed. First, the current position data MP is read from the RAM 4 by the CPU 2.
Is read (step 196). Then, it is determined whether or not there is a house map including the coordinates of the current position data MP (step 198). For example, if the house map data is a rectangular range, the coordinates of the current position are within the range surrounded by the coordinates of the four vertices of the square, and furthermore, can the display 33 display a house map centering on the current position? It is determined whether or not it is.

If it is determined that a house map can be displayed, it is next determined whether or not a road map is displayed on the display 33 (step 20).
0). This is to determine whether or not the house map display flag HF is off. Here, when a road map is displayed, the scale of the displayed road map is RA
It is stored in M4 (step 202). On the other hand, when the house map is displayed on the display 33, this step 202 is jumped. Then, the CPU 2 reads out the house map data around the current position from the house map data file and sends it to the image processor 9. As a result, a house map having the current position as the center of the screen is displayed on the display 33 (step 20).
4). Then, since the house map is displayed on the display 33, the house map display flag HF is set to ON (step 206).

On the other hand, if the house map display flag JF is off at step 190, it is next determined whether or not the road map display flag DF is on (step 20).
8). Here, if the road map display flag DF is on, a road map is displayed. Even if the display of the house map is requested, if the own vehicle is running at a predetermined speed or higher (NO in step 194), or house map data for displaying a house map around the current position on the display 33. If there is no (No in step 198), a road map is displayed.

Step 208 is YES, Step 194
Alternatively, if step 198 is NO, it is next determined whether or not a house map is displayed on display 33 (step 210). This is to determine whether or not the house map display flag HF is on. Here, if the road map has already been displayed, there is no need to switch the display mode of the map, so this house map switching process (step 124) is ended. On the other hand, when a house map is displayed, the display mode is switched to a road map display mode. At this time, when the display mode is switched from the road map display mode to the house map display mode, the scale data SD stored in the RAM 4 in step 202 is read (step 212).

Then, the CPU 2 reads out the road map data around the current position from the road map data file of the scale corresponding to the scale data SD and sends it to the image processor 9. As a result, a road map having the current position as the center of the screen is displayed on the display 33 (step 214). Then, since the road map is displayed on the display 33, the house map display flag HF is reset to off (step 216).

As described above, in this embodiment, when a destination is set (step 51), after a destination is selected by inputting a list, a house map of a range including the selected destination is automatically displayed. It is displayed on the display 33 (step 76 in FIG. 9 and step 93 in FIG. 10). This allows the user to know the surroundings of the destination in more detail. When the vehicle is stopped or traveling at a speed lower than a predetermined speed, the display of the house map during the destination setting operation is also prohibited by prohibiting the destination setting operation (step 60 in FIG. 9). Is done. Thus, the navigation device can be used more conveniently. Further, when the image range having the destination, the current position, and the center of the cursor on the center of the screen is out of the coordinate range of the house map, the house map is not displayed and a road map is displayed instead (see FIG. 10 steps 90, 97). This prevents the display on the display 33 from being interrupted.

Further, by manually switching the map image displayed on the display 33 to either a house map or a road map (step 120 in FIG. 11), a map display according to the user's request is provided. be able to. For example, while traveling, it is easy to obtain information on a route from a road map, and when setting a point such as a destination, detailed information about each point can be obtained from a house map. Processing can be performed easily. Further, when the vehicle is traveling at a predetermined speed or higher, the display of the house map is prohibited (step 194 in FIG. 14), so that the visibility of the screen during traveling can be improved. At present, to provide detailed information on the shape of a house, the map scale of a house map becomes quite detailed. Therefore, trying to track a vehicle on this residential map will cause the map to scroll faster,
The visibility of the map decreases. Therefore, when the vehicle is traveling at a predetermined speed or more, by prohibiting the display of the house map, it is possible to always provide the user with map information with good visibility.

Further, when the current position approaches within a predetermined distance of the destination, the displayed map information is automatically switched to a house map (step 12 in FIG. 11).
2) The user can easily recognize that he or she has arrived around the destination, and can easily confirm the destination from detailed information (such as the shape of the building) of the point. Therefore, even if the user has arrived around the destination, the user does not know the destination and does not pass next to the destination. Also, when the map information is switched, by storing the scale of the map information before the switch (step 202 in FIG. 14), even if the map switching process occurs, unnecessary map scale change is not performed. This eliminates the need for the user to reset the map scale every time the map is switched.

Note that various combinations of these processes are possible. For example, by combining the process of switching the map by manual operation and the process of switching the map when the vehicle speed is equal to or higher than the predetermined vehicle speed, the housing map is displayed only at a speed lower than the predetermined speed even if the operation is switched to the house map by manual operation. Thus, it is possible to always provide a display with good visibility. In this way, by combining the processes, it is possible to achieve an effect having a higher product value.

12. Drop-off location setting process For example, a sudden request such as a meal or shopping may occur while the vehicle is traveling according to a guide route. In such a case, the navigation device may be able to search whether there is a place requested by the user around the current position. FIG. 15 shows a flowchart of a stopover place setting process executed in such a case. The drop-in place is a place where the user wants to stop by a sudden request as described above.

This drop-in place setting processing (step 25)
0) is provided as a subroutine in the destination setting process (step 51), and is started in response to the operation of the stopover setting switch. The drop-in place setting process (step 250) is repeatedly executed similarly to the current position acquisition process (step 50), the route search process (step 52), and the guidance / display process (step 53).
Further, the RAM 4 is provided with a register that stores stop-by place candidate data DK, stop-by place data DP, search range data SA, search condition data KJ, and stop-by place setting flag TF.

First, it is determined whether the vehicle is stopped or at a speed lower than a predetermined speed (step 252). This is the same process as step 60 in FIG. If the own vehicle is running, this drop-in place setting processing (step 250) is not performed. On the other hand, if the vehicle is stopped, an image requesting a genre input is displayed on the display 33 (step 254). For example, a list of names of a plurality of genres is displayed on the display 33 in the same manner as when the item of the genre is requested in step 68 of FIG. The user selects a genre of the place to drop in from the displayed list (step 256).

Then, an image for selecting a search range, a search condition, and the like is displayed on the display 33 (step 258). The search range is, for example, within a certain distance from the current position, or within the municipalities at the current position.
Various choices are available. The search condition is, for example, a condition such as the presence or absence of a parking lot, business hours, a fee, and the like, which is a guide for the user to select. Data corresponding to these conditions is stored in the detailed destination data file.

When the user views the image and selects a search range, search conditions, and the like, next, a search for a stopover is performed (step 260). Within the search range selected by the user, a place that matches the selected genre and matches the input condition is searched from the destination data file and the detailed destination data file. The searched places are stored in the RAM 4 as drop-in place candidate data.

Next, the current position or the cursor center KLC
It is determined whether or not a house map centered on is displayed on the display 33 (step 262). This is the same process as step 90 in FIG. If there is house map data centered on the current position or the cursor center KLC,
Next, it is determined whether or not a road map is displayed on the display 33 (step 263). If a road map is displayed, the scale of the displayed road map is stored in the RAM 4 (step 26).
4). On the other hand, when the house map is displayed on the display 33, the step 264 is jumped.

Next, the CPU 2 reads out the house map data in the range around the current position or the cursor center KLC and displays it on the display 33 (step 265). Further, the house map display flag HF is set to ON. Then, the range of the house shape of the place determined as the stopover candidate in step 260 is displayed in blue (step 266). In this step 266, the CPU 2 reads out the stopover candidate data stored in the RAM 4 and searches the house shape data file for house shape data that matches the stopover candidate data.
4 is stored.

Further, the shape data is read out of the house shape data stored in the RAM 4, and an instruction for displaying the planar range of the place represented by the shape data in blue is created. Then, when this command is sent to the image processor 9, the range of the house shape of the place corresponding to the designated genre is displayed in blue. For example, as shown in FIG. 16, when a house map is displayed on the display 33, the house shape of a place corresponding to the specified genre is displayed in blue. In FIG. 16, the dashed hatched portion is shown. The user can confirm the location that is a stopover candidate by looking at the image.

Next, the coordinates of the cursor center KLC are searched (step 268), and the house shape containing the coordinates of the cursor center is searched from the house shape data file (step 270). The searched house shape data is stored in the RAM 4. Then, the shape data of the searched house shape data is read out, an instruction to display the coordinate range of the shape data in red is sent to the image processor 9, and the cursor center KL
The house shape where C is located is displayed in red (step 272). In FIG. 16, the solid hatched portion is shown.

The house shape at the place where the cursor center KLC is located may be displayed as a three-dimensional image in which the three-dimensional appearance of this place is converted into a plane figure. For example, the stereoscopic image V shown in FIG.
As in S, a stereoscopic image VS in which the appearance of the place is made into a perspective view is displayed according to the house shape of the place where the cursor center KLC is located. In FIG. 16, the three-dimensional image VS is deviated from the cursor center KLC. However, in reality, the three-dimensional image VS is displayed at a position of a house having the cursor center KLC. And
As for the house shape in which the cursor center KLC is deviated by the movement of the cursor KL, the house shape that has been displayed in red or a stereoscopic image is returned to the original display (step 27).
4). In addition, the house shape of the place corresponding to the genre selected by the user is returned to blue.

When the house shape data including the cursor center KLC is searched in this way, it is next determined whether or not the display of the detailed information is requested (step 282).
This determination is made, for example, by detecting whether or not the user has touched the “detailed information” character displayed on the display 33. When the display of the detailed information is requested, the list image data included in the house shape data searched in step 270 is read out by the CPU 2 and sent to the image processor 9 (step 28).
4). As a result, similarly to the processing of step 102 in FIG. 10, the contents of the detailed data relating to the location at the center of the cursor are displayed on the display 33 in the form of a list.

Next, it is determined whether a return has been requested (step 286). For example, the display 33
It is determined whether or not the character of "return" displayed in "" has been touched by the user. If a return is requested, the stop-by place setting process (step 250) ends, and the process proceeds to the next route search process (step 52).
If there is no return request, it is next determined whether or not a drop-in place registration operation has been performed (step 290).
For example, the word “Registration” is displayed on the screen of the display 33, and whether or not the user has touched this display is determined based on the output signal of the touch switch 34. When the registration operation is performed, the house shape data retrieved in step 270 is stored in the RAM 4 as the stopover data DP.
(Step 108).

When the registration operation is not performed, when the user moves the cursor KL to change the stopover, a screen scrolling process (not shown) is performed by interruption, and the map image displayed on the display 33 is scrolled. Is done. The map image displayed on the display 33 is scrolled so that the cursor center KLC always becomes the screen center. When the scrolling is stopped, the process returns to step 262, where the coordinates of the cursor center KLC are obtained (step 268).
A search for house shape data including LC is performed (step 270).

Further, when the display of the detailed information is requested, the list of the detailed information is displayed (step 28).
2, 284). If the range of the house map displayed on the display 33 is interrupted by scrolling the screen, that is, if the range of coordinates displayed on the display 33 is outside the coordinates of the edge of the house map data, step 262 is executed. Is NO, the display is switched to a road map display with the coordinates of the cursor center KLC at the center of the screen (step 97).

On the other hand, if there is no house map data including the coordinates of the current position or the coordinates of the center of the cursor in step 262, it is next determined whether or not a house map is displayed on the display 33 (step 275). ). This is to determine whether or not the house map display flag HF is on. Here, if the road map is already displayed, there is no need to switch the display mode of the map, so the next step 276 is jumped. On the other hand, when a house map is displayed, the display mode is switched to a road map display mode. At this time, when the display mode of the road map is switched to the display mode of the house map, step 2 is executed.
In step 64, the scale data SD stored in the RAM 4 is read (step 276).

Then, the CPU 2 reads out the road map data around the current position from the road map data file of the scale corresponding to the scale data SD and sends it to the image processor 9. As a result, a road map having the current position or the center of the cursor as the center of the screen is displayed on the display 33 (step 277). Then, since the road map is displayed on the display 33, the house map display flag HF is reset to off. In this road map,
The location of the stopover candidate is displayed in a manner distinguishable from other locations such as a blue circle. When the road map is displayed on the display 33, the cursor KL is displayed at the center of the screen of the display 33, and the coordinates of the cursor center KLC are obtained by the CPU 2 (step 278).

Next, it is determined whether or not a return has been requested (step 286). If a return has been requested, this drop-in place setting processing (step 250) ends and the next route search processing (step 250) Proceed to step 52). If there is no request for return, it is determined whether or not the next stopover has been registered (step 288). If the registration operation has been performed, the coordinates of the cursor center KLC searched for in step 278 are displayed. The indicated position is drop-in place data D
It is stored in the RAM 4 as P (step 290).

When the registration operation is not performed and the user moves the cursor K
When the designated position of the stopover location is changed by moving L, the above-described screen scroll processing is performed, and the display 3
The map image displayed in 3 is scrolled. When the scrolling stops, the process returns to step 262, and the coordinates of the cursor center KLC are obtained (step 278). If the screen scrolling allows the display of a house map centered on the cursor center KLC in the coordinate range displayed on the display 33, the determination in step 263 becomes YES, and the cursor center KLC is determined.
The display is switched to the display of the house map centering on the screen at the coordinates of (step 265).

When the stopover point is set in this way, in the route search processing (step 52), a process of setting a guide route from the current position to the stopover point is performed, and the guidance / display processing (step 53) is performed. In ()), the navigation operation is performed according to the guidance route to the stopover place. When the route search process (step 52) and the guidance / display process (step 53) are started, a process is performed to determine whether or not the stop-by place setting flag TF is on. Then, the drop-off place setting flag TF
If is turned on, a guidance route to the stopover place is set, and navigation is performed. If the stopover location setting flag TF is off, a guidance route to the destination is set, and navigation is performed.

As described above, even when a stopover is set, a house map in a range including the current position is automatically displayed on the display 33 after a genre is selected (step 265). This allows the user to know the surroundings of the current position in more detail. When the vehicle is stopped or traveling at a speed lower than the predetermined speed, the display of the house map is also prohibited by prohibiting the operation of setting the destination (step 252). This allows
This navigation device can be used more conveniently.

Further, when the image range having the current position or the center of the cursor at the center of the screen deviates from the coordinate range of the house map, the house map is not displayed, and a road map is displayed instead (step). 262, 277). This prevents the display on the display 33 from being interrupted. Further, the house shape of the place corresponding to the genre selected by the user is displayed in blue (step 266), and the house shape including the cursor center KLC is displayed in red or the stereoscopic image VS.
(Step 272) makes it easy to confirm the stopover or the house shape at the cursor position, which can contribute to shortening the time for determining the stopover.

Note that the present invention is not limited to the above embodiment,
Various changes can be made without departing from the spirit of the present invention.
For example, in the above embodiment, when displaying a house map or a road map on the display 33, the current position, the destination, or the center of the cursor is centered on the screen, but this may be centered on other coordinates. For example, in the case of displaying a wide area ahead in the traveling direction, a point ahead of the current position by a predetermined distance may be set as the center of the screen.

Also, the house shape of the above-mentioned stop-by place candidate is displayed in blue (step 266 in FIG. 15), and the house shape including the cursor center KLC is displayed in red or the stereoscopic image VS (step 272 in FIG. 15). ) Examples are shown, but of course, the colors to be displayed are not limited, and the brightness of the range of the house shape,
You can change the brightness and ground pattern, blink the house shape,
A mark such as an arrow pointing to a house shape may be displayed.

[0107] The house map may be any map that can recognize the whole shape or a part of a building such as a building, a facility, and a bridge by coordinates. Regarding the display of the shape of the building, all the buildings in the data may be displayed, or may be displayed as needed.
The house shape data may be any data as long as it represents the shape of a building or detailed information belonging to the building. Forming the shape of the building as data and recognizing the shape of the building allows searching for the building at the input point, and the user can easily and easily input the desired building. Can be done. In addition, if the configuration of the building is displayed on the display screen using the building shape data, the visibility of the currently displayed point can be improved, and the point can be easily recognized. Become.

Although the touch switch input has been described above as the input means, it goes without saying that various changes such as joystick input, remote control input, and voice input are possible. Further, the three-dimensional image may be displayed at a position via a linked display object such as a leader line, in addition to the position of the house shape serving as a stopover place.

As described above, the conditions for switching between the house map and the road map are selected according to the selection operation by the person riding the vehicle, and the genre of the stopover place by the person riding the vehicle is determined. In addition to selecting according to the designation, depending on whether the current position is within or outside the range stored in the house map data, in addition to selecting according to changes in the current position, the purpose once set Selection according to change of the ground, selection according to whether the vehicle starts running within a predetermined time or outside the predetermined time, selection according to the engine speed, selection according to the time, Select according to the remaining fuel, select according to the engine temperature, select according to the battery voltage, select according to the brightness outside the vehicle, select according to the temperature outside the vehicle Select the direction of travel of the vehicle Depending or selected, or selected in accordance with the direction of the vehicle may be selected depending on the altitude of the vehicle.

In step 60 of FIG. 9, step 194 of FIG. 14, and step 252 of FIG. 15, it is determined whether or not the traveling speed of the vehicle is 0 km / h or less than a predetermined speed. Although the process of determining whether or not the vehicle is stopped has been described, the predetermined speed may be a low speed, a low speed, or a medium speed.

The information storage device 37 can be set in a computer in the room or another portable computer, so that the above-described navigation processing can be executed in a place other than the vehicle. For example, map display, simulation movement from a current position to a destination, or distance calculation along a road between any points on the map. Then, the user can have the portable navigation device for outdoor activities, such as cycling, traveling, mountain climbing, hiking, fishing, and the like.

The program and / or data may be sent (transmitted) from an external system to the flash memory 3 via the data transmitting / receiving device 27. This external system is a current position information supply system or an ATIS (traffic information service) information processing center. This external system is provided far from the navigation device. The sent program is installed (transferred / copied) into the flash memory 3 when the program is sent to the navigation device or when the operator instructs.

The above-described route search processing (step 52), guidance start point processing (step 460), final guide point determination processing (step 462), guidance route search processing (step 464), point setting processing (step 460), etc. It may be executed by the external system. The processing result and the map information are sent (transmitted) from the external system to the navigation device. Based on the received processing result and map information, road information display and route guidance are executed by the navigation device. In this case, the road information, the map information, the facility information, and the traffic congestion information are collectively processed and controlled by the external system, so that more optimal route search and point setting can be performed.

The above-mentioned program is automatically executed when the information storage device 37 is set in the present navigation device, automatically when the power of the present navigation device is turned on, or executed by an operator. . Since this program and data cannot be stored in the RAM 4 in a nonvolatile manner, this installation is executed every time the power is turned on. If the information reading speed from the information storage device 37 is high, the CPU 2
May directly read and execute the program in the information storage device 37. The flash memory 3 is a battery-backed RAM, IC memory card or EP
A ROM may be used.

Note that the display 33 and the image memory 10 are divided into two or more, and the divided image memory 1 is divided into two.
0, the data of the road map and the data of the house map are written, and the road map and the house map are simultaneously displayed. In this case, the two maps are maps corresponding to the current position or the destination or the stopover point, but may be a map corresponding to the destination or the stopover point only on one side and a map corresponding to the current position only on the other side.

The current position may include a departure point or a start point at which guidance can be provided, if necessary. The departure point may include a current position or a guidance start point, as the case may be. The destination includes a stop-off or a guideable end point.

According to the present invention, information on a building, such as the shape and name of the building, is stored (house shape data file).
A map is displayed based on the information (step 9 in FIG. 10).
3, step 204 in FIG. 14, step 26 in FIG.
5) A map display device that recognizes the shape of the displayed building (shape data) may be used, or a building corresponding to the input point may be searched and notified (FIG. Step 99 of Step 10 and Step 270 of FIG. 15) may be performed.

Further, the present invention provides a storage means (house shape data file) for storing external information of a building such as a plane shape, a three-dimensional shape or a site of a plurality of buildings, and the storage means stored in the storage means. Reading means (CPU2) for reading external information of the building, converting means (image processor 9) for converting the external information of the building read by the reading means into information for display, and this converting means Display means (display 33, step 93 in FIG. 10, step 93 in FIG. 14, step 204 in FIG. 14, FIG. 15) for displaying a map showing the external information of the building based on the external information of the building converted by
265), and the map displayed on the display means can recognize the shape of the building.

The present invention also relates to an external information storage means (house shape data file) for storing external information of a building, such as the shape of the building, and the building stored in the external information storage means. The internal information storage means (such as the detailed data in FIG. 6) for storing internal information such as the address, name or telephone number of the building in correspondence with the external information of the building, and stored in the external information storage means. Display means (display 33,
Step 93 in FIG. 10, step 204 in FIG.
5, step 265), discriminating means (step 99 in FIG. 10, step 270 in FIG. 15) for discriminating the shape of the building from the map indicating the external information of the building displayed by the display means. Search means (step 102 in FIG. 10 and step 284 in FIG. 15) for searching the internal information corresponding to the building determined by the means from the internal storage means, and the building searched by the search means A map display device including a notifying unit (step 102 in FIG. 10 and step 284 in FIG. 15) for notifying the internal information of the object may be used.

Further, the present invention provides a house shape data storage means (house shape data file) for storing information on a building such as the shape of the building, and a map based on the information stored in the house shape data storage means. Display means for displaying and outputting information (display 33, step 93 in FIG. 10, step 204 in FIG. 14, step 265 in FIG. 15) and point input means for inputting a point based on the information displayed on the display means (Cursor KL, step 94 in FIG. 10, FIG. 15
Step 268) and a house shape search means (step 99 in FIG. 10) for recognizing the shape of the building based on the house shape data storage means and searching for a building corresponding to the point input by the point input means. , FIG. 15, step 270), wherein the display unit notifies the building corresponding to the point input by the input unit (step 5 in FIG. 8).
3) A map display device characterized in that:

The present invention also provides a current position detecting means (step 50 in FIG. 8) for detecting the current position of the vehicle, and a house shape data storing means (house shape data file) for storing the shape of the building in a coordinate sequence. Display means (display 33, step 93 in FIG. 10, step 204 in FIG. 14, step 265 in FIG. 15) for displaying and outputting map information based on the information stored in the house shape data storage means; Point input means (cursor KL, step 94 in FIG. 10, step 268 in FIG. 15) for inputting a point based on the information displayed on the means, storage of the point coordinates input by the input means and the house shape data storage House shape search means (FIG. 10) for comparing and judging the shape of the building formed by the coordinate sequence of the means and searching for a building corresponding to the input point coordinates.
Step 99, step 270 in FIG. 15) and destination setting means (step 108 in FIG. 10, FIG. 15) for setting the building searched by the house shape searching means as a destination.
Step 290), and a route calculating means (Step 52 in FIG. 8) for calculating a route from the current position to the destination set by the destination setting means, wherein the display means receives an input from the input means. The building corresponding to the determined point coordinates is notified (step 53 in FIG. 8), and the route calculated by the route calculating means is notified (FIG. 8).
(Step 53).

Further, according to the present invention, house shape data representing the shape of a place divided in a plane included in a predetermined area, the position of each place, and house shape data in which information relating to each place is stored. House shape data storage means (house shape data file)
And a destination specifying means (cursor KL) for specifying a destination location by a point, and a coordinate searching means (FIG. 1) for searching for coordinates of the point specified by the destination specifying means.
0, step 268 in FIG. 15, and based on each house shape data stored in the house shape data storage means, the coordinates of the place searched by the coordinate search means are in the range of the house shape. House shape search means (step 99 in FIG. 10 and step 270 in FIG. 15) for searching for house shape data included in the object, and a destination whose destination is a place represented by the house shape data searched by the house shape search means Ground setting means (step 108 in FIG. 10, step 290 in FIG. 15);
Guide route setting means (step 5 in FIG. 8) for setting a guide route to the destination set by the destination setting means.
2) and display means for displaying an image (display 33)
Information display means (step 102 in FIG. 10, step 284 in FIG. 15) for displaying information on a place included in the house shape data searched by the house shape search means on the display means; Current position detecting means for detecting a position (step 50 in FIG. 8); and route display control for displaying on the display means the guide route set by the guide route setting means and the current position detected by the current position detecting means. (Step 53 in FIG. 8).

The claims at the beginning of the parent application of the divisional application are as follows. [A] A road map formed based on road information and a house map formed based on information on a building such as the shape of the building are stored, and the map can be switched. Map display device.

[B] Road information storage means for storing road information representing roads displayed as a map, and building storage for storing external information of buildings such as the shapes of a plurality of buildings displayed as a map. Means, selecting means for selecting the road information and external information of the building, and selecting road information and building information from either the road information storing means or the building storing means in accordance with the selection of the selecting means. Reading means for reading any of the external information; converting means for converting any of the road information and the external information of the building read by the reading means into information for displaying as a map; Display means for displaying, as a map, road information or external information of a building converted by the method.

[C] Information storage means for storing map information, current position detection means for detecting the current position of the vehicle,
An input unit for inputting information necessary for calculating a route such as a destination; a route calculating unit for calculating a route based on information input by the input unit and map information stored in the information storage unit; Route guidance means for performing route guidance based on the route calculated by the route calculation means and the current position detected by the current position detection means; map information read from the information storage means and calculated by the route calculation means Display means for displaying a route; and map information switching means for switching map information to be displayed on the display means, wherein the information storage means stores road map data formed based on the road information. Storage means, and housing map information storage means for storing house map data formed based on information on the building such as the shape of the building, The map information switching means reads the road map data from the road map information storage means and creates the house map data from the house map information storage means by determining predetermined conditions. A navigation device for switching between map information and outputting to the display means.

[D] The current position detecting means detects the speed of the vehicle. If the map information switching means determines that the vehicle speed detected by the current position detecting means is equal to or higher than a predetermined vehicle speed, The navigation device according to claim C, wherein the map information displayed and output on the display means is switched from a house map to a road map.

[E] A selection means for selecting map information manually or automatically is provided, and the map information switching means judges the map information selected by the selection means and outputs the map information to the display means. The navigation device according to claim C, wherein the map information is switched.

[F] A remaining distance calculating means for calculating a distance from the current position detected by the current position detecting means to the destination inputted by the input means, wherein the map information switching means comprises: Based on the remaining distance calculated by the calculation means, it is determined that the distance from the destination has approached within a predetermined distance, and the map information displayed and output on the display means is switched from a road map to a house map. The navigation device according to claim C, wherein

[G] House shape data in which house shapes representing the shapes of places divided into planes included in a predetermined area, the positions of the places, and house shape data in which information on the places are related are stored. Storage means; display means for displaying an image;
House map data generating means for generating house map data for displaying a house map displayed using a house shape of a place divided in a plane included in the predetermined area, and generated from the house map data generating means. House map display control means for displaying a house map on the display means based on the obtained house map data; and a road for displaying a road map displayed using a road network and geographic information included in a predetermined area. A road map data generating means for generating map data;
A road map display control means for displaying a road map on the display means based on the road map data generated by the road map data generating means; a destination designating means for designating a destination location by a point; A coordinate retrieving means for retrieving coordinates of a point designated by the destination designating means; and the point retrieved by the coordinate retrieving means based on each house shape data stored in the house shape data storing means. House shape search means for searching for house shape data whose coordinates are included within the range of the house shape, destination setting means for setting a destination represented by the house shape data searched by the house shape search means as a destination, A genre selection means for selecting a genre of a stopover; a search condition inputting means for inputting a search condition of a stopover; and information on a place which may be selected as a stopover. Drop-in place search means for searching the place data storage means for a place data storage means for storing and a place which corresponds to the genre selected by the genre selection means and which matches the condition inputted by the search condition input means; Drop-off place candidate display control means for displaying the house shape of the place searched by the drop-off place candidate search means on the house map in a manner distinguishable from the house shape of other places; Drop-off place designation means for designating a drop-off place from the drop-off place candidates displayed by the control means, and the house shape of the drop-off place designated by the drop-off place designation means are distinguished from other drop-off place candidates. Drop-in place display control means for displaying the stop-in place in a manner selected by the stop-in place specifying means for searching for coordinates of a point designated by the stop-in place designation means Coordinate search means, based on each house shape data stored in the house shape data storage means, the coordinates of the point of the drop-in point searched by the drop-in point coordinate search means are included in the range of the house shape. Drop-off house shape search means for searching for house shape data to be retrieved, drop-off place setting means for making the place represented by the house shape data retrieved by the drop-off house shape search means a drop-off place, and setting by the destination setting means Guide route setting means for setting a guide route to the set destination and a guide route to the stopover place set by the stopover place setting means; a current position detecting means for detecting a current position of the moving means; Route display control means for displaying the guide route set by the route setting means and the current position detected by the current position detection means on the display means; Destination approach determination means for determining whether or not the current position has approached the destination within a predetermined distance when the guide route is displayed on the display means by the road display control means; and First display switching means for determining which of the road maps to display on the display means in accordance with a predetermined condition; and when the destination is set by the destination setting means,
A second display switching means for displaying a housing map around the destination; and a destination approach determining means, when it is determined that the current position has approached the destination within a predetermined distance, a housing around the current position. Third display switching means for displaying a map, and whether or not a range of a house map displayed on the display means by the house map display control means is out of a coordinate range in a screen displayed on the display means. A housing map display range determining means for determining whether the housing area is out of a coordinate range in a screen displayed on the display means by the display range determining means; A fourth display switching means for switching from the display of the first to the display of the road map;
When the road map displayed on the display means is switched to the house map by the second, third or fourth display switching means, a scale storage means for storing a scale of the road map; The road map displayed on the display means is switched to the house map by the second, third or fourth display switching means, and when the road map is switched again, the road map is displayed at the scale stored in the scale storage means. Scale holding means for displaying a road map; manual switching means for determining which of the house map and the road map to display on the display means by a manual operation of a user; and whether or not the moving means is moving. A movement discriminating means for discriminating whether or not the moving means is moving, and a table of a house map by the house map display controlling means; Housing map display prohibition means for prohibiting the display, and information display control means for displaying, on the display means, information on a place included in the house shape data searched by the house shape search means. Navigation device.

[H] A road map formed based on the stored road information is read out and output, and the stored house map is used as at least the external information of the building relating to the shape of the building. A home map formed on the basis of this is read and output, and the two read outputs are switched in accordance with a detected predetermined condition to output any one of the maps, thereby providing a map information processing method. A medium that stores a computer program.

[I] The predetermined conditions include a selection operation by the operator, a change in the current position, a change in the traveling state of the own vehicle, a change in the speed of the own vehicle, a change in the direction of the own vehicle, a change in the destination, or The change in the distance to the destination or the stop-over location, and the external information of the building is the number of floors, area, height, advertising body, color, planar shape, three-dimensional shape or external feature of the building, The above house map contains the names of buildings, telephone numbers, addresses, postal codes, fields, industries, brands, items, prices, performances,
9. The medium storing a computer program for map information processing according to claim 8, wherein the medium also includes internal information of an actual result or an internal characteristic.

[J] means for storing a plurality of map information for forming a plurality of maps having different degrees of detail for the same area; means for outputting the plurality of stored map information; Based on the above, if the map information corresponding to the input point and the map information having a different level of detail from the already output map information is stored, the map information having the different level of detail is output. A map display device for navigation.

[K] A means for storing a plurality of pieces of map information for forming a plurality of maps having different degrees of detail for the same area, wherein the stored plurality of pieces of map information are output, and based on the input point. If the map information corresponding to the input point is stored and the map information having a different level of detail from the already output map information is stored, the map information having the different level of detail is output. A map display method for navigation characterized by the following.

[L] means for storing house map information for forming a house map, wherein the house map information comprises at least external information and internal information of a building in the house map, and Based on a search condition or a search range, a means for searching for a building that matches the search condition or the search range from the internal information of the building in the house map, based on the external information of the building Means for displaying a house map representing the external information of the building, and displaying the external information of the searched building by changing the display from the others. Display device.

[M] A means for storing house map information for forming a house map, wherein the house map information is a means for storing at least external and internal information of a building in the house map. Based on a predetermined search condition or search range, a building that matches the search condition or search range is searched from the internal information of the building in the house map, and the building is searched for in the external information of the building. A map display method for navigation, comprising: displaying a house map representing external information of the building based on the retrieved information, and displaying the retrieved external information of the building differently from others.

[N] The internal information of the building in the house map is information of the field of the building, the search condition or the search range is the field, and the searching means is:
The map display device for navigation according to claim L, wherein a building corresponding to this field is searched.
[O] The map display device for navigation according to claim 1, wherein the search range is a range at a fixed distance from a current position, or the search range is within a municipal town at the current position.

(Summary of Embodiment) The embodiment described below stores a road map formed based on road information and a house map formed based on information on a building such as the shape of the building. (Road data file), and the map can be switched as required (map switching processing in FIG. 11, steps 90, 91, 93, 95, 9 in FIG. 10).
7. Steps 262, 263, 265, 27 in FIG.
5, 277).

In the embodiment described below, the information storage means (road data file) for storing map information, the current position detection means for detecting the current position of the vehicle (step 50 in FIG. 8), the destination Input means (destination designation processing in FIG. 9) for inputting information necessary for route calculation, etc., and a route is calculated based on the information input by the input means and the map information stored in the information storage means. Route calculating means (step 52 in FIG. 8), and a route guiding means (step in FIG. 8) for performing route guidance based on the route calculated by the route calculating means and the current position detected by the current position detecting means. 53) display means (display 33) for displaying the map information read from the information storage means and the route calculated by the route calculation means; and map information to be displayed on the display means. Map switching process of the map information switching means (11 to switch the step 90 in FIG. 10,
91, 93, 95, 97, steps 262, 2 in FIG.
63, 265, 275, 277), wherein the information storage means is a road map information storage means (road map data file) for storing road map data formed based on the road information; House map information storage means (house map data file) for storing house map data formed based on the information related to the building. The map information switching means determines a predetermined condition, Switching between map information created by reading road map data from the road map information storage means and map information created by reading house map data from the house map information storage means, and outputting to the display means. It is also a navigation device.

The display of the house map and the display of the road map are switched according to (determination of) a predetermined condition. This makes it possible to switch between the house map and the road map according to various conditions, such as when the visibility of the route is required or when the confirmability of the point is required. Since the display of the road map and the housing map can be switched according to the judgment of the predetermined condition, the visibility of the route can be improved during the route guidance, and the point can be determined under the predetermined condition. It can be done easily. In addition, the provision of the map information selecting means facilitates the recognition of a point even when the point is set.

When the current position of the vehicle has reached the vicinity of the destination, the map is switched to a house map in which the point can be easily confirmed, so that the position of the destination can be accurately determined. Arrival to the ground can be facilitated. In addition, by displaying the road map when the traveling speed of the vehicle is equal to or higher than the predetermined speed, the visibility of the map during traveling is improved. In addition, when it is desired to check the location of a building, the building can be easily recognized by displaying a house map on condition that the vehicle speed is equal to or less than a predetermined vehicle speed.

[0141]

According to the present invention, a plurality of pieces of map information for forming a plurality of maps having different degrees of detail for the same area are stored, and based on the input points, the above-mentioned information corresponding to the input points is stored. If the map information, which is different from the already output map information and the degree of detail is stored as described above, the map information having the different degree of detail is output. Therefore, it is possible to automatically output a map having a different level of detail from the output map for the input point, output a map with various levels of detail, and freely select the level of detail of the map. And the like.

[Brief description of the drawings]

FIG. 1 is an overall circuit diagram of a navigation device.

FIG. 2 is a diagram showing storage contents of an information storage device 37;

FIG. 3 is a diagram showing a display example of a road map.

FIG. 4 is a diagram showing a display example of a house map.

FIG. 5 is a diagram showing a part of data stored in a RAM 4;

FIG. 6 is a diagram showing the contents of house shape data.

FIG. 7 is a diagram showing an example of shape data of a house shape and a cursor KL.

FIG. 8 is a diagram showing a flowchart of an overall process.

FIG. 9 is a diagram showing a flowchart of a destination setting process.

FIG. 10 is a diagram showing a flowchart of a destination designation process.

FIG. 11 is a diagram showing a flowchart of a map switching process.

FIG. 12 is a diagram showing a flowchart of a manual operation process.

FIG. 13 is a diagram showing a flowchart of a destination approach switching process.

FIG. 14 is a diagram showing a flowchart of a house map switching process.

FIG. 15 is a diagram illustrating a flowchart of a stopover location setting process.

FIG. 16 is a diagram showing an example of color display and three-dimensional display of a house shape.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Central processing unit, 2 ... CPU, 3 ... ROM, 4 ...
RAM, 9 image processor, 10 image memory, 11
... Sound processor, 13 ... Speaker, 20 ... Current position detecting device, 21 ... Absolute direction sensor, 22 ... Relative direction sensor, 23 ... Distance sensor, 24 ... Vehicle speed sensor, 25 ... GP
S receiving device, 26: beacon receiving device, 27: data transmitting / receiving device, 30: input / output device, 33: display, 3
4 ... Touch panel, 37 ... Information storage device.

Claims (2)

[Claims] 1. A means for storing a plurality of map information for forming a plurality of maps having different degrees of detail for the same area; a means for outputting the stored plurality of map information; If the map information corresponding to the input point is stored, and the map information having a different degree of detail from the already output map information is stored,
Means for outputting map information having different degrees of detail. A map display device for navigation. 2. A means for storing a plurality of pieces of map information for forming a plurality of maps having different levels of detail for the same area, comprising: outputting the plurality of pieces of stored map information; If the map information corresponding to the input point is stored and the map information having a different degree of detail from the already output map information is stored,
A map display method for navigation, characterized by outputting map information having different degrees of detail.