JP3463144B2 - Building shape map display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building shape map display device for displaying a shape map of each building, facility or other various structures in a display mode according to the height of the building.

[0002]

2. Description of the Related Art In a navigation device, a route to a destination is searched based on a point input such as a departure point or a destination, and a screen or voice is used based on the searched guide route. As a guide screen when performing route guidance by using a route, there is a method of displaying a map around the current position and displaying the current position mark on the map.

However, when a normal road map is displayed, the line thickness is different depending on the road type such as a main road or a local road, and the display color of the guide road is changed based on the guide route. Or, the route is displayed slightly thicker on the map, but when displaying the building shape map, it is displayed on a road with a width corresponding to the actual road, which makes the route display difficult to see. Occurs. For example, when the number of lanes is the same, the route display overlaps with the center line, and when there are many traveling lanes on the opposite side, the center line is biased toward the traveling lane side and the route is displayed on the opposite side. Will end up. Further, in the building shape map, there is a problem that it is difficult to recognize the correspondence with the entity because the tall building and the low building have the same display mode.

[0004]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned problems and is displayed in a building shape map displayed according to the shape of a building so that the correspondence with the entity can be easily recognized. It is a thing.

To this end, the present invention provides a storage means for storing data of a building shape map having information for each building including height information, a display means for displaying the map, and the display means. A display control means for checking the height information of the building when the building shape map is displayed on, and controlling the display of the building according to whether the height is a predetermined value or more. Characteristic and storage means for storing data of a building shape map having information belonging to the building including height information for each building, display means for displaying the map, and building shape on the display means. When the map is displayed, the height information of the building is checked, and at least one of the color and the pattern of the building is determined according to whether the height is a predetermined value or more, and the display of the building is controlled. Display control means for Information is to be information of a rank of buildings.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment as a navigation device for displaying a building shape map according to the present invention. An input / output device 1 for inputting / outputting information on route guidance, a present for detecting information on the current position of the vehicle. The position detecting device 2, an information storage device 3 in which navigation data required for route calculation, display guidance data required for guidance, etc. are stored, and route guidance processing and display guidance processing required for route guidance are performed and the entire system is performed. It is composed of a central processing unit 4 for controlling the above. First, each configuration will be described.

The input / output device 1 instructs the central processing unit 4 to perform navigation processing according to the driver's intention so that the driver can input the destination or output the guidance information by voice and / or screen when the driver needs it. In addition, it has a function of printing out the processed data. As a means for realizing the function, the input unit has a touch switch 11 and an operation switch for inputting a destination by a telephone number, coordinates on a map, or requesting route guidance. Of course, an input device such as a remote controller may be used. In the output unit, input data is displayed on the screen, or a display 12 that automatically displays route guidance on the screen in response to a driver's request, data processed by the central processing unit 4, and stored in the information storage device 3 are stored. A printer 13 that prints out the data and a speaker 16 that outputs the route guidance by voice are provided.

Here, a voice recognition device for enabling voice input or a recording card reading device for reading data recorded in an IC card or a magnetic card can be added. In addition, an information center that stores data necessary for navigation and is provided via a communication line at the driver's request, an electronic notebook in which driver-specific data such as map data and destination data is stored in advance. It is also possible to add a data communication device for exchanging data with the information source.

The display 12 is composed of a color CRT or a color liquid crystal display, and is required for navigation such as a route setting screen based on map data or guidance data processed by the central processing unit 4, a section map screen, an intersection map screen, etc. All screens are displayed in color, and on this screen, buttons for setting route guidance, guidance during route guidance, and switching screens are displayed. In particular, passing intersection information such as the name of a passing intersection is displayed in a pop-up color on the section map screen at any time.

The display 12 is provided in the instrument panel near the driver's seat, and the driver can confirm the current position of the vehicle by looking at the section map and obtain information on the route from now on. You can Further, the display 12 is provided with a touch switch 11 corresponding to the display of the function buttons, and is configured to execute the above-mentioned operation based on a signal input by touching the button. The input signal generating means including the button and the touch switch constitutes an input section, but a detailed description thereof will be omitted here.

The current position detecting device 2 is a GPS receiving device 21 using a satellite navigation system (GPS), a beacon receiving device 22, such as a cellular phone (automobile phone) or F.
A data transmitter / receiver 23 for receiving a GPS correction signal using an M multiplex signal, an absolute direction sensor 24 including a geomagnetic sensor, a relative direction sensor 25 including a wheel sensor, a steering sensor, a gyro, and the like, rotation of wheels. A distance sensor 26 for detecting the traveling distance from the number is provided.

The information storage device 3 is an external storage device that stores a navigation program and data, and is, for example, a CD-ROM. The program includes a map drawing unit, a route search unit, a route guidance unit, a current position calculation unit, a destination setting operation control unit, and the like, and an application unit and an OS unit that perform signal output processing for navigation.
Program for processing such as route search, display output control required for route guidance, program for performing voice output control required for voice guidance and data required for it, and display required for route guidance and map display Stores information data. Also, the data includes map data (road map, residential map, building shape map, etc.) necessary for route guidance, intersection data, node data, road data, photo data,
Registration point data, destination point data, guide road data, detailed destination data, destination reading data, telephone number data,
It consists of a file of address data and other data and stores all data necessary for the navigation device.

The central processing unit 4 has a CPU 40 for executing various arithmetic processes, a flash memory 41 for reading and storing a program from a CD-ROM of the information storage device 3,
ROM 42 storing a program (program reading means) for performing program check and update processing of flash memory 41, set destination point coordinates, road name code No. Based on the display output control signal from the RAM 43, the image memory 44 in which the image data used for the screen display on the display is stored, the RAM 43 for temporarily storing the searched route guidance information and the data being calculated. An image processor 45, C for extracting image data from the image memory 44, performing image processing and outputting the image data to a display.
Information storage device 3 based on audio output control signal from PU
The speaker 1 which synthesizes the voice, the phrase, the sentence, the sound, etc. read from
6, a voice processor 46 for outputting to 6, a communication interface 47 for exchanging input / output data by communication, a sensor input interface 48 for taking in a sensor signal of the current position detection device 2, and a date and time for writing internal diagnostic information. It is equipped with a clock 49 and the like. In the central processing unit 4, the data acquired by each sensor of the current position detection device 2 is used as the sensor input interface 4
When fetched from 8, the CPU 40 based on the data,
The current position coordinates are calculated at fixed time intervals and temporarily stored in the RAM 4
Write to 2. The current position coordinates are obtained by performing map matching processing in consideration of detection errors of various data. Further, the output values of various sensors are constantly corrected. Here, the route guidance is configured so that the driver can select either screen display or voice output.

FIG. 2 is a diagram showing a configuration example of road guidance data and the like, FIG. 3 is a diagram showing a configuration example of road attribute data and the like, FIG. 4 is a diagram showing a configuration example of caution point data and the like, and FIG. 5 is a building. It is a figure which shows the structural example of the data of a shape map. 2 to 5 show an example of the structure of a main data file stored in the information storage device. The guide road data file is, as shown in FIG. 2A, a road number for each of the road numbers n. , Length, road attribute data, address of shape data, address of size and address of guidance data, size, and are stored as data required for route guidance obtained by route search.

The road number is set for each road between the junctions (outgoing route, returning route). The road attribute data is road guidance auxiliary information data, and as shown in FIG. 3A, information about an elevated road / underpass and whether the road is an elevated road, next to the elevated road, underpass, or next to the underpass and lanes. It is data showing information on the number. As shown in FIG. 2B, when the shape data is divided at a plurality of nodes (sections) on each road,
It has coordinate data consisting of east longitude and north latitude for each of the number of nodes m. As shown in FIG. 2C, the guidance data includes intersection (or branch) name, attention point data,
It consists of road name data, road name voice data address, size and destination data address, and size data.

Of the guidance data, the caution data is shown in FIG.
As shown in (A), this is data indicating information such as railroad crossings, tunnel entrances, tunnel exits, width reduction points, and none. It calls the driver's attention at railroad crossings, tunnels, etc. other than branch points. Is data for. Road name data is
As shown in FIG. 3 (B), information on road types of highways, urban highways, toll roads, general roads (national roads, prefectural roads, etc.) and highways, urban highways, toll roads Is information data, and is composed of road type data and an in-type number which is individual number data for each road type. As shown in FIG. 2D, the destination data includes a destination road number, a destination name, an address of destination name audio data, a size and destination direction data, and travel guidance data.

Of the destination data, the destination direction data is invalid (does not use the destination direction data), unnecessary (does not guide), straight ahead, rightward, as shown in FIG. 2 (E).
It is data indicating information on the diagonal right direction, the direction returning to the right, the left direction, the diagonal left direction, and the direction returning to the left. As shown in FIG. 4B, the driving guidance data stores data for guiding which lane to drive when there are a plurality of lanes. Rightward, leftward, central, or none. This is data indicating that information.

The data of the building shape map is, for example, as shown in FIG.
As shown in (A), the data number N of each building is stored next to the data number N of buildings, bridges, towers, parks, playgrounds, roads, and the like. And the data of each building is
It consists of the building name, address (address), type, building shape, height, and detailed information. The name is the building name if it is a building, the resident name if it is an individual house, the facility name if it is a facility, "Chuo-dori" if it is a road, and "National Road 1".
No. ”is the road type or street name, and the street address.
Is the address of the building. The shape of a building has a coordinate number n representing the shape and its coordinate values (x ₀ , y ₀ ), (x ₁ , y
₁ ), ..., (x _n-1 , y _n-1 ) and the type is information such as general houses, condominiums, office buildings, public facilities, roads, and parks. The height is information on the number of floors and the height (m). For example, in the case of a tenant building, the details are information about each occupant. For each tenant, name, phone number, room number, classification (family restaurant, convenience store, etc., type of business, business content) Is information about. Therefore, as shown in FIG. 5 (B), coordinate values are sequentially read out as information on the shape of the building, and drawn by connecting and drawing with a line to display various building structures such as the planar shape of a building or a house or the topography of a park. The shape of can be output. Of course, even roads can be treated as data having a shape. Further, road signs for prohibiting entry into the road, one-way streets, street names, town names that are area names, etc. may be configured as independent data or may be configured as auxiliary data. In this case, for example, a mark indicating that entry is prohibited or one-way traffic has a coordinate value and an angle at which the mark is displayed.
The same applies to street names and town names.

Next, the operation will be described. FIG. 6 is a diagram for explaining the flow of the entire system of the vehicle navigation device according to the present embodiment, FIG. 7 is a diagram for explaining the display process of the building shape map, and FIG. 8 is a display process of the building shape. FIG. 9 is a diagram for explaining a building name display process, and FIG. 10 is a diagram showing a display example of a building shape map.

When the CPU 51 of the central processing unit 4 activates the program of the route guidance system, as shown in FIG. 6, the current position detecting device 2 first detects the current position and displays the peripheral map around the current position. At the same time, the name of the current position and the like are displayed (step S1). Next, a destination is set using a telephone number, an address, a facility name, a registration point, etc. (step S2), and a route from the current position to the destination is searched (step S3). When the route is determined, the current position is traced by the current position detection device 2 and the route guidance / display is repeatedly performed until the destination is reached (step S4). When the detour setting is input before reaching the destination, the search area is set, the search is performed again in the search area, and the route guidance is repeated until the destination is reached.

Further, a judging means for judging a predetermined condition,
Since it has a configuration for switching the map when the predetermined condition is satisfied, the map can be switched at a desired timing by the user's manual operation, so that the road map is displayed while the route is traveling. However, when it is desired to detour on the way, detailed information around the desired facility can be promptly provided by performing a map switching operation. This makes it possible to obtain various information such as a desired facility position, a parking lot position, and information about one-way traffic in the surroundings, and the destination can be reliably reached.

In the above processing, a road map or a building shape map is displayed as necessary in each process of inputting / confirming / setting of the current position or destination, confirmation of the searched route, route guidance, etc. Next, the display processing of the building shape map using the data described in FIG. 5 will be described.

For example, when the building shape map is selected as shown in FIG. 7 in the map display mode (step S
11) First, the shape map display process is executed (step S12), and the building name display process is executed on the shape map (step S13). Then, the current position mark and guidance information are displayed. (Step S14). The shape of a building is a planar shape for general houses and buildings and other buildings, and the planar terrain for parks and roads. Therefore, in the case of a building with a large number of occupants, there is information about the occupants of that building, and even if the shape of one building has a lot of information, the shape map of step S2 In the display processing of 1 and the display processing of the building name in step S3, the shape is displayed in a display mode different from that of a general house for a building or a public facility having a lot of information, and the priority is given. If the name is displayed and the names overlap, the name is not displayed. Furthermore, the names of towns and public facilities are displayed in descending order of priority by setting the town name, public facilities, and names with a lot of in-building information.

In the building shape display processing, as shown in FIG. 8A, the building shape map data in the display range is retrieved and read from the information storage device 3 (step S21), and the building shape to be displayed is displayed. The display mode of (step S2
2). This display mode is the color of the shape to be displayed, its density, their pattern, etc. as described above, and is determined based on the type, height, and scale of the configuration. For example, by type, it can be distinguished by public facilities, stations, theaters, museums, amusement parks, towers, condominiums, buildings other than ordinary houses, etc. It can be distinguished by the public facilities such as a playground and a playground, and can be distinguished by the height (the number of floors), the number of tenants, etc. even in buildings other than ordinary houses. After the display mode is determined in this way, the building shape map is displayed (step S23), and the inside of the shape is displayed in the determined display mode (step S2).
4).

For the display mode in step S22, for example, if a display mode determination table as shown in FIG. 8B is registered, data of the building shape map to be displayed and this display mode determination table are referred to. You can decide. The one shown in FIG. 8 (B) is a color when the building to be displayed is a public facility, and a d color when it is a guide road.
If you have more information, not a public facility or a road,
Depending on the scale, it is divided into shades of b color, and if the height is not less than a predetermined value, the color corresponding to the type, height, and scale of the configuration, such as a mesh pattern of c color, This is an example in which the display mode of the density, the pattern thereof and the like is set. Therefore, when this display mode determination table is used, step S
At 22, the following processing is performed.

First, as shown in FIG. 8 (C), the data of each building shape map is referred to the display mode determination table (step S31), and it is first checked whether the type is public facility, road or other (step S32). ), If it is a public facility, the display mode is determined to be a color (step S33), and if it is a road and it is a road on the searched guide route (guide road), the display mode is d. The color is determined (step S34). Since the searched route is included in the guide road data as described with reference to FIG. 2, the guide route is drawn on the map with a width corresponding to the number of lanes based on the guide road data. In other cases, which is neither a public facility nor a road, it is checked whether there is detailed information next (step S3).
5) If there is, depending on whether or not the number of names in it is α or more (step S36), the display mode of those having α or more is b color (step S38), and the display mode of those without α is faint. The color is determined (step S37). Even if there is no detailed information, the height of the building is further checked (step S39), and if the height is a certain height or more, the display mode is determined to be the c-color mesh pattern (step S40). In this case, whether or not it is a public facility has the highest priority,
Second, the detailed information, the scale of the building composition,
Finally, the display mode is determined by the height.

The names displayed on the building have different lengths, and it is not possible to display all the names depending on the size of the screen and the display range. Therefore, similar to the case of determining the above-described display mode, for example, a priority order according to the type and a priority order according to the amount of detailed information are provided and displayed within a range that does not overlap. FIG. 9 shows an example of the processing. First, the names are stored in the range of data to be displayed in descending order of the number m of names in the detailed information (step S5).
1). Then, the display range of names on the map is calculated (step S53) for all names in descending order of the number m of names (step S53), and those that do not overlap the display range of the names already displayed (step S54). , The name is displayed on the map (step S55). Then, the display range is stored (step S56), the process returns to step S52, and the same processing is repeated.

Here, the display range of the name is determined by allocating it to both sides from the center of the building according to the vertical and horizontal size of one character and the character interval, and is determined by the coordinates of the upper left and lower right positions of the character string. Remembered. Also, if the display ranges do not overlap, if you judge only by the vertical and horizontal size of the characters and the character spacing, the adjacent names will be displayed on one side at a short interval, making it difficult to see the map. When the distances are larger than the above, it may be determined that the display ranges do not overlap. As a method in this case, for example, the character size α
This can be achieved by setting the display range to double and β times to the left and right, or setting a predetermined number of characters vertically and horizontally as the allowable interval. Needless to say, the name includes not only a character string, but also a mark such as a school or hospital or a post office generally used for displaying a map, a service mark, and other various characters and patterns.

As described above, in the data of the building shape map of this embodiment, the center coordinates and the coordinates of the display range when the name is displayed can be determined by calculation from the coordinate sequence of the shape. Therefore, another map stored together with the building shape map can be displayed in the information storage device, and the name of the data of the building shape map can be displayed thereon in the display range calculated from the coordinate sequence. In this case, the process of displaying the map and the process of displaying the name can be executed without being aware of each other at all, and the gap between the display of the map and the display of the name can be eliminated by matching the display coordinates of each. With such a combination of processes, the coordinate sequence and name of the shape in the data of the building shape map can be shared with other maps as the name display data, and the amount of data can be significantly reduced.

FIG. 1 shows a display example of the building shape map.
The display example of the building shape map when the vehicle is stopped is shown in FIG.
0 (A), the display example of the building shape map excluding information other than road is shown in FIG. 10 (B), route display, current position mark display, and guidance intersection at the building shape map excluding information other than road FIG. 10C shows an example in which a mark display and a one-way mark display are incorporated. FIG. 10 (A) shows
The names of buildings, public facilities, and streets are also displayed as the names of buildings, and some of the buildings are displayed in different patterns in different display modes. In the case of color display, since it is possible to distinguish and display by color, density, and a combination of those patterns, the display mode is changed according to the data type information, height information, the number of detailed names, and the like. For example, buildings that can be commonly recognized as targets, such as schools, city halls, post offices, public facilities such as stations, and parks, and in tenant buildings, buildings with a large number of names are displayed as normal display modes. By adopting different display modes, it is possible to make the target objects and characteristics of the area displayed as a map easy to understand. Further, FIG. 10B shows an example in which the drawing of the house shape is restricted from the building shape map and displayed, and here, highlighting of information about the road such as a one-way mark, a route display, and a mark. FIG. 10C shows an example of displaying. These will be described further below.

When the building shape map is displayed in the normal mode, the above processing is performed. However, when the building shape map is displayed for route guidance in a running vehicle, it is displayed on the map. If there is a large amount of information in the vehicle, the information necessary for driving will be buried in other information. Especially when the vehicle is traveling at a certain speed or more, it is difficult to see the screen and recognize the information while traveling even if the map is displayed. Therefore, even when the building shape map is displayed on the guide screen, it is necessary to display the guide information so that the guide information can be identified and recognized almost instantly by just looking at it. The display example will be described below. 11 is a diagram showing an example of a guide screen based on a building shape map, FIG. 12 is a diagram for explaining an example of a house shape display process, and FIG. 13 is a diagram for explaining an example of a one-way mark display process. FIG. 14 is a diagram for explaining an example of route display processing, and FIG. 15 is a diagram for explaining an example of mark display processing.

In FIG. 11, 61 is a road, 62 is a guide route, 63 is a center line, 64, 65 and 69 are one-way roads, 66 and 70 are one-way marks, 67 is a search range line, and 68 is a current position mark. Indicates. When the building shape map is displayed on the guide screen during traveling, basically, as shown in FIG. 11A, the road 61, the one-way road 64,
A current position mark 68 indicating the current position on the road is displayed at 65 and 69. Furthermore, as information related to roads, information necessary for running such as one-way marks 66, railroad crossings, pedestrian crossings, and even marks along the road that can be recognized immediately can be easily understood according to the running state (emphasized). And then display. In this case, the necessary information is information relating to roads around the current position, which is within a certain radius around the current position, information about roads along the traveling direction from the current position, and traveling direction. Only information about roads within a predetermined angle range and road information within a predetermined distance range in the traveling direction are highlighted. Further, the range of the angle and the distance may be changed according to the vehicle speed, such that the relatively far front is emphasized in the case of high-speed traveling and the relatively close front is emphasized in the case of low-speed traveling. Further, the information related to the calculated guide route may be retrieved from the storage unit to emphasize the information related to the guide route. The information related to the guide route is, for example, information about a road connected to a road on the guide route or information about roads around the road on the guide route. Of these, the search range line 67 is a range set at a certain angle, for example, ± 60 ° with respect to the front of the current position mark 68 in order to search for information to be highlighted. For example, the one-way mark 66 is searched and highlighted in this range, and the one-way mark 70 is normally displayed because it is outside the search range. Before the current position mark 68 reaches the position shown in the figure, In other words, if the one-way mark 70 is located in front of the one-way road 69 further below, the one-way mark 70 is also highlighted, and after passing, the highlighted display is switched to the normal display. Therefore, in the building shape map shown in FIG. 10A, information that is not necessary for traveling, such as a house shape, is drawn in the same color as the background color, or by not drawing the information. As shown in (B), it is practically not displayed. The guide route 62 is drawn from the guide road data with a predetermined width based on the coordinate value and the number of lanes. When searching for a highlighted mark or the like from the position of the current position mark 68, the range is set by an angle with respect to a certain traveling direction as described above, but both sides in front of the current position mark 68 based on the guide route 62 are set. The range may be set at a constant distance. As shown in FIG. 10 (B), the house shape is erased from the structure shape map shown in FIG. 10 (A), the current position mark and the route are displayed, and a one-way mark is added as information about the road along the route. FIG. 10 (C) shows the marks of schools, post offices, and gas stations as marks as well as highlighting.

Next, an example of the display processing according to the traveling based on the building shape map will be described. As a way of using the building shape map, for example, when finding a point to be set as a destination from the map of the area displayed based on certain information, it is desirable to display detailed information. During driving, only the information related to the road needs to be highlighted. On the contrary, the house shape not related to the road is unnecessary.
Therefore, in the display of the house shape, the current position is recognized as shown in FIG. 12 (step S61), a building shape map around the current position is drawn (step S62), and whether or not the vehicle speed is equal to or higher than a predetermined value. Is determined (step S63). Then, when the vehicle speed is equal to or higher than the predetermined value, the background color is set in the house-shaped pallet to display, for example, as shown in FIG. 10B (step S64). When the vehicle speed is not equal to or higher than the predetermined value, By setting the house-shaped color as shown in FIG. 8B in the house-shaped palette, for example, FIG.
It is displayed as shown in (A) (step S65). In this process, whether or not the house shape is not related to the road to be guided can be determined based on the data type of the building shape map described with reference to FIG. Therefore, a special type of house shape can be excluded from the processing target.

When the house-shaped display pallet, which is not required to be displayed during traveling, is changed to the same pallet as the background color on the basis of the predetermined vehicle speed as described above, the display screen is substantially It is not displayed, but the drawing process is the same as the actual display. In this way, when the display contents at the time of traveling at or above the predetermined vehicle speed and at the time of stopping or traveling at low speed are switched by changing the palette, there is an effect that the display processing at the boundary of the predetermined vehicle speed can be performed quickly. Further, the display control means is provided with a means for determining a predetermined condition, and when it is determined that the predetermined condition is satisfied, the information necessary for display is selected from the storage means so that only the information necessary for display is drawn. It can also be configured to. With this configuration, it is possible to reduce the time required for drawing processing.
Even when the vehicle is traveling at high speed or when the drawing process is required at a high speed such as when scrolling the screen, the drawing process can be quickly performed. Further, these processes may be switched as necessary by the means for judging the predetermined condition.

Information about roads such as a one-way mark for the house shape is selected and highlighted as necessary information for the traveling direction during traveling. In the display of the one-way mark, it is determined whether or not the vehicle speed is equal to or higher than a predetermined value as shown in FIG. 13 (step S71). If the vehicle speed is equal to or higher than the predetermined value, one-way traffic within a predetermined value from the current position bearing is performed. The mark is searched (step S72), and the searched one-way mark is highlighted (step S73). However, if the vehicle speed is not equal to or higher than the predetermined value, it is determined whether or not the previous vehicle speed is equal to or higher than the predetermined value (step S74). If the last vehicle speed is equal to or higher than the predetermined value, it is highlighted. The highlighting of the one-way mark is erased and a normal display is made (step S7).
5). In this case, the one-way mark around the current position may be highlighted as described above, or the search range may be set by distance or angle and changed according to the vehicle speed. Since the one-way mark is not registered in the data of the building shape map, if one cannot be searched for, one-way road may be determined according to the type of road data and the one-way mark may be displayed. Furthermore, not only the one-way mark, but also marks such as railroad crossings, pedestrian crossings, and traffic lights may be targets of such display control, and roads for which entry is prohibited may be particularly highlighted. As the form of highlighting, the information to be highlighted may be displayed more prominently than the other information currently displayed, or only the information to be highlighted may be displayed on the screen. To display only the information you want to highlight on the screen, you can erase the information other than the information you want to highlight, or select only the information you want to highlight and draw only the selected information. May be. In the example of FIG. 10C, a one-way road is connected behind the current position, but it is not a road in the traveling direction. Therefore, by deleting the one-way mark displayed in FIG. 10B. By displaying only the one-way mark in the traveling direction, the highlighting is performed as a result.

When the route is displayed on the road map,
The road is displayed as a single line, so it is only necessary to display the road in a specific color. However, when displaying the route on the building shape map, the lines on both sides and the center line are drawn. Since it is displayed according to the width of the vehicle, it is necessary to display the route on the side of the driving lane by deviating from the center line. In the display of the route, the following process is repeated until the number of route roads is processed for each road number based on the guide road data as shown in FIG. 14 (step S81). Calculate the route width from the number of lanes on the route road (step S8
2) Determine whether the road is one-way (step S8)
3). If the road is a one-way road, a contour line is created from the route width (step S85). If the road is not a one-way road, the contour line is shifted by half the route width, that is, the center line to the opposite lane. Is created (step S84), and 62, 71 to 73 in FIG. 11 and FIG.
As shown in (C), the outline is filled with a predetermined pattern (step S86).

Since the guide road data created by the road map data has information about each road as shown in FIGS. 2 to 4, by using the information,
It is possible to match it on the building shape map, and by displaying the route in a pattern of a blurred road width such as a mesh pattern, it is possible to easily display road information such as lane information and road name. In addition, by using the information from the right, from the left, and from the center of the travel guidance data shown in FIG. 4B, even when there are a plurality of lanes, FIG.
As shown at 73 in (B), a route may be displayed by selecting a specific lane in the lane. In the route display shown in FIG. 11B, since the route 71 at the current position is a one-way road, the pattern is drawn in the center of the road as it is. When making a left turn to, the vehicle makes a right turn to the route 73 to 74 immediately at the next intersection, and therefore, it is an example in which the lane near the center is displayed as in the pattern shown in the routes 72 to 73.

When the route is guided by a road map,
Conventionally, when approaching an intersection to be guided, in order to improve the visibility of the guide information, a more detailed intersection guide map is switched and displayed. However, when performing route guidance using a building shape map, the map itself has detailed information,
Even at a guidance intersection, guidance can be provided by displaying a characteristic mark without displaying the intersection guidance map. In the display of the mark, the current position is recognized as shown in FIG. 15 (step S91), and it is determined whether or not the distance to the guidance intersection is within a predetermined value (step S92). , Facilities around the guidance intersection are searched (step S93). Then, a facility that can be displayed as a mark is searched from the searched facilities (step S94), and the mark is drawn at the searched position (step S95). For example, gas stations, banks, government offices (police stations, fire stations,
When a facility such as a government office, post office, school, etc.), a convenience store, a family restaurant, etc. is located around the intersection to be guided, various service marks, characters, etc., such as those shown in FIG. By displaying a mark consisting of a pattern (landmark),
Even if you do not switch to the intersection map as in the past, you can easily guide the intersection and route without changing the building shape map. Of course, if there is no particular mark, it may be a character such as “City Office” in FIG. The predetermined value for determining whether or not the distance to the guidance intersection is within a predetermined value may be changed according to the vehicle speed. Further, by providing a means for retrieving the landmark information around the detected current position, the landmark is displayed along with the movement of the current position, and the confirmation of the current position becomes easy. Further, by providing means for retrieving landmark information around the route, only the landmarks along the route may be displayed. Further, the displayed mark may be controlled by searching for the mark information located in the forward direction from the current position. Further, when displaying a mark around the current position, the search range or distance may be changed according to the vehicle speed. Alternatively, a search may be performed in a wide range, and the displayed mark information may be displayed after performing a selection process according to the vehicle speed.

Next, from the CD-ROM of the information storage device 3 in which the program and the data are recorded to the flash memory 41.
The operation of the system for loading the program will be explained. 16 is a diagram for explaining the program loading process, FIG. 17 is a diagram for explaining the program version check process, and FIG. 18 is a diagram for explaining the structure of the CD-ROM data. As described above, the navigation device according to the present embodiment uses the CD of the external storage device.
-Built-in a relatively large capacity flash memory 41 for reading a program from a ROM, and a small capacity ROM 42 storing a program (program reading means) for performing a CD startup process. The flash memory 41 is a non-volatile storage means that retains stored information even when the power is turned off. Then, as the CD startup processing, the program of the ROM 42, which is the program reading means, is activated to check the program stored in the flash memory 41, and the disc management information of the CD-ROM of the information storage device 3 is read. The program loading process (update process) is performed based on this information and the state of the flash memory 41.

First, when the power is turned on, the screen is turned off as shown in FIG. 16 (step S11), and a program check is performed to see if the program is normally written in the flash memory (step S12). If the program check is OK, the program stored in the flash memory is activated (step S1).
3) Display the opening screen (step S1
4), the disc management information of the CD-ROM is read (step S15), and the program version No. of the CD-ROM is read. And the program version number stored in the flash memory. Then, the program version is checked (step S16). Based on the comparison of these program versions, it is judged whether or not the program is updated (step S17). If the program version of the CD-ROM is not the version upgraded from the program version of the flash memory, the program of the flash memory is not updated. To display the map screen (step S18), but if the program version of the CD-ROM has been upgraded, switch to the upgrade screen (step S19) and clear the flash memory (step S20). It returns to the process of step S12.

If the program check is NG in the process of step S12, the disc management information of the CD-ROM is read (step S21), and it is checked whether or not the disc is a dedicated disc (step S22). If it is not a dedicated disc, a guide message "Please insert a dedicated disc" is displayed on the screen (step S23), and if it is a dedicated disc, the loader program of the CD-ROM is read (step S24) and the loader program is started ( Step S25). Then, the message "Program loading" is displayed (step S26), and the CD is displayed.
-The navigation program in the ROM is read (step S27), written in the flash memory (step S28), restarted (step S29), and the process returns to step S12. In this way, when the program is normally written in the flash memory, even if a compatible CD-ROM is set, the program versions of both are compared and the CD-ROM is upgraded. Only by updating the program in the flash memory, it is possible to always operate the system with the latest version of the program without loading the program unnecessarily.

In the version check processing of steps S16 to S17, as shown in FIG. 17, the program version in the flash memory is compared with the program version in the CD-ROM (step S31), and the classification No. Is checked (step S32), and the classification No. If they are not different, the update No. in the flash memory is further updated. Is checked whether it is older than that in the CD-ROM (step S33). Then, the classification No. If they are different, or the classification No. The update No. in the flash memory is not different. If is older, the program is updated and the classification No. Update N in the flash memory
o. If it is older than that in the CD-ROM, it is determined that the program is not updated.

The structure of the CD-ROM data is shown in FIG.
8, disk management information, loader program,
It consists of a navigation program and data. The disc management information is the type of the CD-ROM (for navigation, music, video, etc.), if it is for navigation, it is a district version, nationwide version, or for tourism, leisure, genre, etc. , Update no. With information such as.
In the case of navigation, if it is a district version, the area can be identified from the coordinates by holding the area with the coordinates. As described above, the navigation program includes a map drawing unit, a route search unit, a route guidance unit, a current position calculation unit, a destination setting operation control unit, and the like, and an application unit and an OS unit that perform a signal output process of the navigation. The data is map data, search data, guide data, map matching data, destination data, and the like.

When a CD changer is used in combination with the program reading means, the CD can be automatically replaced based on the replacement instruction. When the CD is specified, first, the disc management information (disc label) of the CD is read, the contents of the disc management information are judged, and the CD to be driven is selected. Then, if the selected CD is the navigation CD, the classification number of the selected CD. , Update (version) No.
Confirm, and execute the above-mentioned program memory update processing.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the route display is performed using only the mesh pattern, but the mesh pattern may be changed depending on the destination direction data shown in FIG. 2, the road attribute data shown in FIG. 3, and the road name data. Good. Further, in switching the map, a road map may be displayed and guided up to the vicinity of the destination, and the map may be switched to the building shape map on condition that the vicinity of the destination is approached.

[0046]

As is apparent from the above description, according to the present invention, storage means for storing data of a building shape map having information belonging to each building including height information for each building, Display means for displaying a map, and checking the height information of the building when the building shape map is displayed on the display means, and controlling the display of the building according to whether the height is a predetermined value or more Since the display control means is provided, the display is controlled according to the high building and the low building, and a building shape map that is easy to see can be displayed. In addition, it becomes easy to recognize the current position on the building shape map.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a building shape map display device according to the present invention as a navigation device.

FIG. 2 is a diagram showing a configuration example of road guidance data and the like.

FIG. 3 is a diagram showing a configuration example of road attribute data and the like.

FIG. 4 is a diagram showing a configuration example of attention point data and the like.

FIG. 5 is a diagram showing a configuration example of data of a building shape map.

FIG. 6 is a diagram for explaining the flow of the entire system of the vehicle navigation device according to the present embodiment.

FIG. 7 is a diagram for explaining display processing of a building shape map.

FIG. 8 is a diagram for explaining a building shape display process.

FIG. 9 is a diagram for explaining a building name display process.

FIG. 10 is a diagram showing a display example of a building shape map.

FIG. 11 is a diagram showing an example of a guide screen based on a building shape map.

FIG. 12 is a diagram for explaining an example of a house shape display process.

FIG. 13 is a diagram for explaining an example of one-way mark display processing.

FIG. 14 is a diagram for explaining an example of route display processing.

FIG. 15 is a diagram for explaining an example of mark display processing.

FIG. 16 is a diagram illustrating a program loading process.

FIG. 17 is a diagram illustrating a program version check process.

FIG. 18 is a diagram for explaining the structure of CD-ROM data.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input / output device, 2 ... Present position detection device, 3 ... Information storage device, 4 ... Central processing unit, 11 ... Touch switch, 12
... display, 13 ... printer, 16 ... speaker, 2
1 ... GPS receiver, 22 ... Beacon receiver, 23 ...
Data transmitting / receiving device, 24 ... Absolute direction sensor, 25 ... Relative direction sensor, 25 is distance sensor, 40 ... CPU, 41 ...
Flash memory, 42 ... ROM, 43 ... RAM, 44
... image memory, 45 ... image processor, 46 ... audio processor, 47 ... communication interface, 48 ... input interface

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G08G 1/0969 G08G 1/0969 G09B 29/00 G09B 29/00 A 29/10 29/10 A (58) Fields surveyed (Int .Cl. ⁷ , DB name) G01C 21/00-21/36 G01C 23/00-25/00 G06F 17/30 G06F 17/60 G08G 1/00-9/02 G09B 23/00-29/14

Claims (3)

(57) [Claims] 1. A storage unit for storing data of a building shape map having information belonging to the building including height information for each building, a display unit for displaying the map, and the display unit.
Height information of the building when displaying the building shape map on
And check whether the height is above a certain value
And a display control means for controlling the display of the building shape map display device. 2. A storage unit for storing data of a building shape map having information belonging to the building including height information for each building, a display unit for displaying the map, and the display unit.
Height information of the building when displaying the building shape map on
And check whether the height is above a certain value
Select at least one of the color and pattern of the
A building shape map display device, comprising: a display control unit for controlling. 3. The height information is information on the number of floors of the building.
Building shape map display device according to claim 1 or 2, characterized in that there.