JPH05181915A - Map retrieving system - Google Patents

Abstract

PURPOSE:To obtain a map retrieving system which enables even a user side to freely set and alter the object of a map retrieving function by storing data on a map drawing including the specified object and displaying the object in the center when the optional object is specified. CONSTITUTION:'Object setting' is specified in a main menu. Consequently, a large-item menu 42 which is already specified up to now is displayed. One item in the large-item menu 42 is selected and 'input' 44 is specified, so that large item names which are set already are altered and a new large item name is set. Further, the large item which is set already is selected in the large-item menu 42 and 'object' 45 is specified, so that a user object menu which is set already up to now is displayed. One item in the user object menu is selected and 'input' is specified, so that user object names which are set already are altered and a new user object name are set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map search system for providing map information to an unspecified number of users.

[0002]

2. Description of the Related Art A map search system has a magnetic disk or the like on which map information is recorded as a database, and searches the map information from this database in response to a request from the user to find a map of a portion desired by the user. It is a system for providing unmanned display services, and is installed, for example, in police stations or in so-called information corners.

This map retrieval system is equipped with a touch panel type display screen as an input operation unit in consideration of an unspecified number of users. That is, on this display screen, for example, a list of addresses and the like is displayed, and when the user touches the target address with his / her finger from this address list, the map information corresponding to this address is retrieved and displayed on the screen. ..

Further, a list of targets such as station names, police signatures, post office names, department store names, etc. is displayed, and when a target is designated by the user, information on a map drawing including this target is displayed. Some systems have a search and display function.

Generally, in such a system, what is set as a target object is determined after a thorough investigation is conducted mainly by public institutions. At that time, if too many target objects are set, it takes time to find the target object and the operability deteriorates. Therefore, the number of target objects is limited to the 32 most frequently searched targets. ..

However, if the target is fixedly limited and the public institution is the center, the map search function from the target that the system has is significantly limited. In addition, in the conventional system, since the target object cannot be set or changed by the user, it is not possible to respond immediately when the position of the target object moves, and incorrect information is provided. There is a risk of causing a fatal situation in this type of system.

[0007] When the user specifies the current location and the destination on the map screen, a map including both of these points is displayed on one screen, and the user then specifies the passing point, so that the current location is selected. There is also a system that has a function to calculate and display the distance from to the destination.

However, in this case, when the distance from the current position to the destination becomes long, it is necessary to display the map at a considerably reduced magnification due to the restriction of the screen size. Therefore, there is a problem in that the characters such as the building name, road name, and intersection name written on the map, which are important for knowing the directions, are too small to be seen.

[0009]

As described above, in the conventional map search system, since the type and number of target objects to be targeted by the map search function are fixed in advance, the use of the map search function is limited. It was in the range of the target. There is also a problem that the movement of the target object cannot be immediately dealt with. Further, in the function of displaying a map including the current location and the destination, when the distance from the current location to the destination becomes long, characters such as building names on the map become too small to be seen. There was also.

The present invention is intended to solve such a problem, and an object of the present invention is to provide a map search system in which a target object of a map search function can be freely set and changed by the user.

It is another object of the present invention to provide a map search system which does not deteriorate the operability even if the number of target objects for the map search function is increased.

Further, according to the present invention, the names of buildings, roads, intersections, etc., which are important landmarks for the user to know the route, are superposed on the map in a certain size regardless of the distance from the present location to the destination. The purpose is to provide a map search system that can be displayed.

[0013]

In order to achieve the above-mentioned object, the map search system of the present invention stores map information storing means for storing map information consisting of a plurality of map drawings, and is stored in this map information storing means. A target object setting means for setting arbitrary coordinates on the arbitrary map drawing as a target object together with the target object name, a map drawing number including the target object set by the target object setting means, and a target on this map drawing The coordinates of the object,
And target object information storage means for storing the target object name, target object name list display means for displaying a list of target object names stored in the target object information storage means, and an arbitrary target object name from the list of target object names When is specified, the map information of the corresponding map drawing is searched from the map information storage means based on the map drawing number and the coordinates of the target object stored in the target information storage means, and the corresponding target object is displayed in the center. And a map display means for doing so.

In order to achieve the above-mentioned object, the map retrieval system of the present invention stores a map information storing means for storing map information composed of a plurality of map drawings, and an arbitrary map drawing stored in this map information storing means. Target setting means for setting the above arbitrary coordinates as a target together with a target name and a group name, a map drawing number including the target set by the target setting means, and a target on this map drawing Target information storage means for storing coordinates, target name and group name, group name list display means for displaying a list of group names stored in the target information storage means, and any group name from the list of group names Is specified, the target object name display means for searching and displaying all the target object names belonging to this group name from the target object information storage means and the target object name display means When an arbitrary target object name is designated from the list of target object names shown, the corresponding map drawing from the map information storage means is based on the map drawing number and the target object coordinates stored in the target object information storage means. And map display means for retrieving the map information of and displaying the target object in the center.

In order to achieve the above-mentioned object, the map retrieval system of the present invention further includes a map information storage means for storing map information composed of a plurality of map drawings, and map information of an arbitrary map drawing from the map information storage means. And a map display means for searching and displaying, a mark setting means for setting arbitrary coordinates on the arbitrary map drawing displayed by the map display means together with the mark name as a mark on the route guidance, and this mark setting. Map drawing number, including landmarks set by means
The mark information storage means for storing the coordinates of the mark and the mark name on this map drawing, and the current location, the destination, and the passing point from the current location to the destination are specified on the map drawing displayed by the map display means. At this time, there is provided mark display means for displaying the position of the mark on the route guidance on the map drawing together with the mark name based on the information stored in the mark information storage means.

[0016]

In the map retrieval system of the present invention, when the target object setting means sets arbitrary coordinates on an arbitrary map drawing stored in the map information storage means as a target object together with the target object name, these The map drawing number including the set target object, the coordinates of the target object on the map drawing, and the target object name are stored in the target object information storage means. After that, a list of the target object names stored in the target object information storage means is displayed, and when an arbitrary target object name is designated from this, map information is displayed based on the information stored in the target object information storage means. The storage unit retrieves the map information of the corresponding map drawing and displays the target object as a center.

Therefore, according to the present invention, the target object which is the object of the map search function can be freely set and changed by the user, so that the map search function can be effectively used in a wider range. It will be possible and the performance of the map search function will be greatly improved. Further, in the map search system of the present invention, when the target object setting means sets arbitrary coordinates on an arbitrary map drawing stored in the map information storage means as a target object together with the target object name and the group name, these The map drawing number including the set target object, the coordinates of the target object on the map drawing, the target object name and the group name are stored in the target object information storage means. After that, a list of group names stored in the target object information storage means is displayed, and when an arbitrary group name is specified from among these, all target object names belonging to this group name are displayed from the target object information storage means. It is searched and displayed. Further, when an arbitrary target object name is specified from the list of target object names, the corresponding map drawing is stored in the map information storage means based on the map drawing number and the target object coordinates stored in the target object information storage means. The map information is searched and the target object is displayed.

Therefore, according to the present invention, the targets can be grouped and set hierarchically.
Even if the number of targets is increased, the targets can be efficiently selected.

Further, in the map search system of the present invention, when the mark setting means sets any coordinates on any displayed map drawing as a mark on the route guidance together with the mark name, these are set. The map drawing number including the mark, the coordinates of the mark on this map drawing, and the mark name are stored in the mark information storage means. After that, when the current location, the destination, and the passing point from the current location to the destination are specified on the displayed map drawing, the route guidance is displayed on the map drawing based on the information stored in the mark information storage means. The position of the mark is displayed together with the mark name.

Therefore, according to the present invention, the names of buildings, roads, intersections, etc., which are important landmarks for the user to know the route, are displayed on the map regardless of the distance from the present location to the destination. It is possible to display them in a visually recognizable size so that the user can be provided with a more friendly route guidance service.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a map search system according to an embodiment of the present invention. In the figure, reference numeral 1 is a main body of a personal computer including a storage medium storing map data composed of a plurality of map drawings, and 2 is a CRT for displaying map data and the like retrieved from the storage medium. A touch sensor 3 for detecting the coordinates designated by the user's finger is attached on the screen of the CRT 2. Again 4
Is a keyboard for performing various input operations such as inputting character data.

Next, the operation of this map search system will be described.

FIG. 2 shows the first screen when the map search program is started in the personal computer body 1. In the figure, 5 is a portion displaying a map, and an operation frame 6 is displayed and arranged around the map display portion 5. Arrows 7 to 18 are displayed and arranged at the respective corners of the operation frame 6. When one of the arrows 7 to 18 is touched with a finger, the arrow 7 to 18 is displayed.
The map is scrolled in the ~ 18 direction. In the operation frame 6, "end" 19, "reduce" 20, "enlarge" 21,
Each operation item “item” 22 is displayed and arranged. When "end" 19 is designated in this, the map search program is ended. When "reduction" 20 is designated, the magnification of the displayed map is reduced. When "magnification" 21 is specified, the magnification of the displayed map is magnified. When the "item" 22 is designated, a main menu 23 is displayed on a part of the screen as shown in FIG.

The main menu 23 is "address search"
24, "Target search" 25, "Building address display" 26,
"Resident display" 27, "Road guide" 28, "Target setting" 29, "Mark setting" 30, "Overall view display" 31,
The menu item includes "environment setting" 32 and "center point setting" 33.

If the "address search" 24 is specified here, a list of address names is displayed as the next screen. When an arbitrary address name is designated by the user from this list, map data around the address is searched and displayed. When "target search" 25 is specified, a list of target names is displayed on the next screen. When the user designates an arbitrary target object name from this list, map data around the target object is searched and displayed. This operation will be described later in detail. When the “building address display” 26 is designated, the user then designates an arbitrary building on the map, and the address of the designated building is displayed. "Resident display"
When 27 is designated, the user then designates an arbitrary building on the map, and the resident name of the designated building is displayed. The case where "road guide" 28, "target setting" 29 and "mark setting" 30 are specified will be described in detail later. When the "whole map display" 31 is designated, the entire map held in the recording medium is displayed. "Preferences" 32
If is specified, the process for setting the scroll width of the map, the enlargement / reduction width, etc. is started. And "center point setting" 32
When is designated, the user then designates an arbitrary point on the map, and the map is displayed centering on the designated point.

Next, the operation when the above-mentioned "target object search" 25 is designated will be described. FIG. 4 shows the screen that is displayed next when "target search" 25 is specified. As shown in the figure, in this case, the target object search menu 33 is displayed on a part of the screen. This target object search menu 33 includes “fixed target object” 34 and “user target object” 35.
It consists of each selection item. When the "fixed target object" 34 is designated from the target object search menu 33, a fixed target item menu 36 appears as shown in FIG.
Note that, in the large item menu 36, for example, "police station" and "campsite", "telegram station" and "telephone station" are collectively displayed in one group as similar targets. When a large item such as "station" is designated from the large item menu 36, a fixed target menu 37 including a list of station names appears as shown in FIG. When one is selected from the fixed target object menu 37, a map around this station is displayed. At this time, the corresponding station is marked with an asterisk. When the "user target" 35 is specified from the target search menu 33 shown in FIG. 4, a large item menu 38 of the user target appears as shown in FIG. Next, if, for example, "department store" 39 is specified from the large item menu 38, a user target menu including a list of department store names appears. Then, when one is selected from the user target object menu, a map centering on this department store is displayed. At this time, the corresponding department store name is additionally displayed on the map.

Next, the operation for setting the user target object will be described.

In this case, "target setting" 29 is designated from the main menu 23 shown in FIG. As a result, as shown in FIG. 8, the large item menu 42 that has been set up to the present is displayed. An operation frame 46 composed of “delete” 43, “input” 44, and “target” 45 is displayed below the large item menu 42.

When one of the set large items is selected from the large item menu 42 and "Delete" 43 is designated,
The selected major items that have been set are deleted. Also, by selecting one item from the large item menu 42 regardless of whether it has been set or not and specifying "input" 44, the set large item name can be changed and a new large item name can be set. Done. Further, when the set large item is selected from the large item menu 42 and the "target" 45 is designated, the user target menu which has been set up to the present is displayed.
Further, under the user target object menu, an operation frame composed of "delete" and "input" is displayed.

When one of the set user target objects is selected from this user target object menu and "delete" is designated,
The selected set user targets are reduced. Also,
If one item is selected from the user target object menu regardless of whether it has been set or not and "input" is designated, the set user target name is changed and a new user target name is set.

When the setting of the user target object name is completed, a map screen appears for arranging the user target object on the map. Then, by designating an arbitrary point on the map screen, the designated coordinates are assigned to the newly set user target object name.

In the above operation, the large item name and the user target object name are input using the keyboard 4.
Further, by specifying "return" on each operation screen, the operation is interrupted and the screen returns to the initial screen shown in FIG.

Next, the operation when the "mark setting" 30 is designated from the main menu 23 shown in FIG. 3 will be described.

In this case, first, a mark setting menu is displayed on a part of the screen. This mark setting menu is made up of respective selection items of "road mark" and "general mark". In addition, "general landmarks" refer to landmarks other than roads and intersections. Here, when the "road mark" is designated, the road mark setting menu 54 appears as shown in FIG. This road mark setting menu 54 includes “road” 55 and “intersection” 5
It consists of 6 selection items. Further, when "road" 55 is specified from the road mark setting menu 54, the road mark setting process is started. FIG. 10 is a flowchart showing the flow of this road mark setting processing. The flow of this process will be described below with reference to this flowchart. First, an operation guide text for instructing the input of the start point of the road for setting a mark is displayed at the top of the screen (step 1601).

Thereafter, as shown in FIG. 11, when the start point 58 of the road is input (step 1602), this start point 5 is entered.
The drawing number (matrix number) including 8 and the coordinates in this drawing are stored (step 1603), and the content of the operation guidance sentence 57 is changed to a sentence instructing the input of the end point of the road (step 1604).

Next, as shown in FIG. 12, when the end point 59 is input (step 1605), the drawing number including this end point 59 and the coordinates in this drawing are stored (step 16).
06), the content of the operation guidance sentence 57 is changed to a sentence prompting the input of the road name (step 1607).

The map data is displayed by extracting a plurality of drawing data from the drawing data group managed by the matrix number and connecting them. Therefore, any coordinates on the map are represented by the matrix number of the drawing and the coordinates in this drawing. For example, as for the coordinates of the point P in FIG. 13, the drawing number is (1, 1) and the coordinates are (α, β).

After that, when the road name is input from the keyboard 4 (step 1608), it is stored (step 1609), and the road coordinate calculation formula is obtained from the start point coordinates and the end point coordinates (step 1610).

Next, the process for obtaining this road coordinate calculation formula will be described. FIG. 14 is a flowchart showing the flow of this processing.

As shown in FIG. 15, when the start point and the end point are contained in one drawing and the abscissa is X and the ordinate is Y, the linear equation in the drawing is Y = A × X + B ( Since A and B are constants ... (a), the constants A and B may be obtained from the start point coordinates and the end point coordinates.

Further, as shown in FIG. 16, when the start point and the end point are in different drawings, the end point coordinates (Xe ', Ye') seen from the drawing in which the start point exists are obtained. In this case, first, the difference (Dx, Dy) in the drawing numbers between the start point and the end point is obtained (step 2101), and then the difference (Dx, Dy) is multiplied by the maximum coordinate value (Lx, Ly) for one drawing. By adding or subtracting the object to the coordinate value (Xe, Ye) viewed from the drawing in which the end point exists (step 210
2) The end point coordinates (Xe ', Ye') are obtained. For example, in the case of the straight line 60 shown in FIG. 16, one figure is crossed in the positive direction of X and two figures are crossed in the negative direction of Y. Therefore, the end point coordinates (Xe ′, Xe ′, Ye ') becomes Xe' = Xe + Lx * 1 Ye '= Ye-Ly * 2. From the coordinates thus obtained, the constant A of the equation (a),
Find B.

Next, the coordinate values at the boundary between the linear drawings thus obtained and the adjacent drawings are obtained (steps 2103 and 21).
04).

In the case of FIG. 23, first, when the Y coordinate when the X coordinate is Lx is obtained from the equation (a) when viewed from the drawing in which the starting point is present, it is 0>Y> -Ly, so this point has the starting point. It can be seen that there is a boundary between the drawing 61 and the drawing 62 adjacent to the negative direction of Y and the drawing 63 adjacent to this drawing 62 and the positive direction of X.

Next, when the X coordinate when the Y coordinate is 0 is obtained from the drawing in which the starting point exists, 0 <X <Lx, so this point is the drawing 61 in which the starting point exists and this drawing 61.
It can be seen that there is a boundary between the drawing 62 and the drawing 62 adjacent in the negative direction of Y.

Similarly, when the X coordinate when the Y coordinate is -Ly is obtained from the drawing in which the starting point exists, Lx <X <(2
XLx), this point is shown in FIG. 63 and FIG.
It can be seen that there is a boundary between drawing 3 and the drawing 64 adjacent in the negative Y direction.

From the coordinates of these boundaries, drawings 61 to 64 are shown.
The linear equation in is obtained (step 2105).

Then, as shown in FIG. 17, the linear equation, the starting point coordinates, the ending point coordinates, and the road name obtained as described above are collectively stored in the file A for each drawing number.

Note that step 2103 and step 2
18 and 19 show the detailed processing flow of 104 for obtaining the intersections of the straight line and the Y-axis and X-axis, and FIG. 20 shows the detailed processing flow of obtaining the linear equation of each step 2105. Shown respectively.

On the other hand, in FIG. 9, when the "intersection" 56 is designated, the intersection mark input processing is started, and the operation guide text for instructing the input of the intersection position for setting the mark is displayed.
After this, as shown in FIG. 21, the intersection position 68 is displayed on the map.
When is designated, an operation guidance sentence 69 for instructing the input of an intersection name is displayed. When the intersection name is input, as shown in FIG. 22, the intersection coordinates and the intersection name are saved in the file B for each drawing number. Further, when "general mark" is designated from the mark setting menu, the coordinates and the name of the building, for example, as a general mark are also stored in the file B for each drawing number. Next, the operation when the "road guide" 28 is designated in the main menu 23 of FIG. 3 will be described.

When "road guidance" 28 is designated, the route guidance processing is started. FIG. 23 is a flowchart showing the flow of this processing.

First, an operation guidance sentence for inputting a destination is displayed (step 3101). After that, when the destination is designated (step 3102), the drawing number of this destination and the coordinate values in this drawing are stored (step 310).
3) Then, as shown in FIG. 24, a selection menu 72 of the current location and an operation guidance sentence 73 for instructing the input of the current location are displayed (step 3104). In the current location selection menu 72, 74 is an operation frame designated when an arbitrary point is set as the current location, and other than that is designated when a preset point is set as the current location.

When the current location is input from the selection menu 72 (step 3105), the drawing number and coordinate value of the current location are stored (step 3106), and then the current location 75 and the destination 71 are displayed as shown in FIG. A map including the map is displayed (step 3107). Then, the operation guidance sentence 76 for instructing the input of the passing point is displayed (step 3108).
After this, as shown in FIG. 26, a state in which the first passing point 77 is input is shown. When the passing point 77 is designated in this way (step 3109), the drawing number and the coordinate value of the passing point 77 are stored (step 311).
0), the passing point 77 and the current position 75 are connected by a straight line (step 3111).

After this, a mark search on the map is performed as follows from each of the files A and B shown in FIGS. 17 and 22 (step 3113). FIG. 27 is a flow chart showing the flow of this mark search.

First, when the drawing number of the position of the passing point 77 is taken out from the file A and the X coordinate value of the passing point 77 is substituted into the calculation number, the Y result is a value close to the Y coordinate value of the passing point 77. A linear expression that satisfies (± Q = tolerance 1) is searched for, and the road name associated with this linear expression is stored (step 3601).

Next, the data of the drawing number at the position of the passing point 77 is taken out from the file B, and the passing point 77 is extracted from the data.
The intersection coordinates where the X and Y coordinate values of 2 are close to each other (± Q = tolerance 1) are searched, and if there is, the intersection name 78 is displayed on the map (step 3602).

Next, it is checked whether or not there is a building within each position (± T = tolerance 2) in the X and Y directions from the coordinates of the passing point 77. If there is, the building name 79 is displayed on the map. (Step 3603).

After that, when the second passing point 80 is input on the map (step 3109), the drawing number and the coordinate value are stored (step 3110), and then the second passing point 80 is entered.
And a first passing point 77 are connected by a straight line (step 311).
1).

Next, the second passing point 8 from the file A
When the data of the drawing number at the position of 0 is taken out and the X coordinate value of the passing point 80 is substituted into it, the result of Y is a value close to the Y coordinate value of the passing point 80 (± Q = tolerance 1). Is searched for, and the road name associated with this linear expression is stored (step 3601).

At this time, the second road name and the first road name are compared, and if they match, the road name 81 is changed to the first road name and the second road name.
Display in the middle of the dots. The intersection name and building name are also searched and displayed in the same manner as the first point.

Thereafter, the same processing is repeated each time a passing point is input, and when the "end point" 82 is designated, the distance from the current position to this end point is displayed. After that, when "Return" 83 is designated, the screen returns to the first screen shown in FIG.

The detailed processing flow of the road name search in step 3601 is shown in FIG. Step 3602
FIG. 29 shows the detailed processing flow of the intersection name search of FIG. Further, FIG. 30 shows a detailed processing flow of the building name search in step 3603.

Thus, according to the map search system of this embodiment, the user target object of the map search function can be freely set and changed on the user side in an interactive manner, so that this user can be more effectively used. The map search function from the target object can be used, and the performance of the map search function can be significantly improved. Further, since the user target objects can be grouped into large items and set hierarchically, the target objects can be efficiently selected no matter how many target objects are increased. Furthermore, in the route guidance function,
Building names, road names, intersection names, etc., which are important landmarks for users to know directions, can be displayed on the map in a visible size, and the route guidance service is kind to users. Can be provided.

[0064]

As described above, according to the map search system of the present invention, the target object of the map search function can be freely set and changed by the user, so that the map search can be performed more effectively. It becomes possible to use the function. Further, since the targets can be divided into groups and set hierarchically, the targets can be efficiently selected no matter how many the targets are increased. In addition, regardless of the distance from the current location to the destination, the names of buildings, roads, intersections, etc., which are important landmarks for the user to know the route, should be displayed on the map in a visible size. The user can be provided with a more friendly route guidance service.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of a map search system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an initial screen when a map search program is started in the system of FIG.

FIG. 3 is a diagram showing a main menu screen which is a next screen when “item” is designated from the initial screen of FIG.

FIG. 4 is a diagram showing a target selection menu screen which is the next screen when “target search” is specified from the main menu of FIG. 3;

5 is a diagram showing a large-item menu screen which is the next screen when "fixed target" is specified from the target selection menu of FIG.

6 is a diagram showing a fixed target object menu screen which is the next screen when a major item of "station" is specified from the major item menu screen of FIG.

FIG. 7 is a diagram showing a large-item menu screen which is the next screen when “user target” is specified from the target selection menu screen of FIG. 4;

FIG. 8 is a diagram showing a large-item menu screen which is the next screen when “target setting” is designated from the main menu of FIG. 3;

FIG. 9 is a diagram showing a road mark setting menu screen which is a next screen when “road mark” is designated from the mark setting menu.

FIG. 10 is a flowchart showing a flow of road mark setting processing.

FIG. 11 is a diagram showing a screen prompting the user to input the end point of the road in the road mark setting process.

FIG. 12 is a diagram showing a screen for prompting the input of a road name in the road mark setting process.

FIG. 13 is a diagram for explaining the overall configuration of map data and how to represent an arbitrary position on the overall map.

FIG. 14 is a flowchart showing a flow of processing for obtaining a road coordinate calculation formula in the road mark setting processing.

FIG. 15 is a diagram showing a state in which the start point and the end point of a road are included in one drawing in the whole map data of FIG.

16 is a diagram for explaining a method of obtaining a linear equation and end point coordinates when the start point and the end point are in different drawings in the whole map data of FIG.

FIG. 17 is a diagram showing a file content in which a linear expression, a start point coordinate, an end point coordinate, and a road name obtained when the start point and the end point are in different drawings are grouped by drawing number.

FIG. 18 is a flowchart showing a flow of processing when obtaining an intersection of a straight line and a Y-axis in processing for obtaining a road coordinate calculation formula.

FIG. 19 is a flowchart showing the flow of processing when obtaining the intersection of a straight line and the X axis in the processing for obtaining the road coordinate calculation formula.

20 is a flowchart showing the flow of processing when obtaining a linear expression on each drawing in FIG.

FIG. 21 is a diagram showing an intersection name input instruction screen.

FIG. 22 is a diagram showing the contents of a file in which intersection coordinates and intersection names are summarized by drawing number.

FIG. 23 is a flowchart showing the overall flow of route guidance processing.

FIG. 24 is a diagram showing a screen for instructing the input of the current location in the route guidance process.

FIG. 25 is a diagram showing a screen for instructing the input of a passing point between the current location and the destination in the route guidance processing.

FIG. 26 is a diagram showing a route guidance screen.

FIG. 27 is a flowchart showing the flow of landmark search.

28 is a flowchart showing the flow of road name search processing in the route guidance processing of FIG. 27.

29 is a flowchart showing a flow of intersection name search processing in the route guidance processing of FIG. 27.

30 is a flowchart showing the flow of a building name search process in the route guidance process of FIG. 27.

[Explanation of symbols]

1 ... PC main body, 2 ... CRT, 3 ... touch sensor,
4 ... Keyboard.

Claims (3)

[Claims] 1. A map information storage means for storing map information composed of a plurality of map drawings, and an arbitrary coordinate on an arbitrary map drawing stored in this map information storage means is set as a target together with a target object name. A target object setting means, a target object information storage means for storing a map drawing number including the target object set by the target object setting means, coordinates of the target object on the map drawing, and a target object name; Target object name list display means for displaying a list of target object names stored in the target object information storage means, and when an arbitrary target object name is designated from the list of target object names, the target object information storage means Map display means for retrieving map information of the corresponding map drawing from the map information storage means based on the stored map drawing number and coordinates of the target object and displaying the corresponding target object in the center. Map search system according to claim. 2. A map information storage means for storing map information composed of a plurality of map drawings, and a target object name and a group name with arbitrary coordinates on an arbitrary map drawing stored in the map information storage means as a target object. Target setting means set together with the number of the map drawing including the target set by the target setting means, the target information on the map drawing, the coordinates of the target, the target name and the group name are stored. Storage means, group name list display means for displaying a list of group names stored in the target object information storage means, and when any group name is specified from the group name list, the target object information storage means From the target object name display means for searching and displaying all the target object names belonging to this group name from the list of the target object names displayed by the target object name display means. When the object name is designated, the map information of the corresponding map drawing is searched from the map information storage means based on the number of the map drawing stored in the target object information storage means and the coordinates of the target object. A map search system comprising a map display means for displaying a target object as a center. 3. A map information storage means for storing map information composed of a plurality of map drawings, a map display means for searching and displaying map information of an arbitrary map drawing from this map information storage means, and this map display means. Mark setting means for setting arbitrary coordinates on the arbitrary map drawing displayed by, together with the mark name as a marker on the route guidance, and the map drawing number including the mark set by this mark setting means, this map Mark information storage means for storing the coordinates of the mark on the drawing and the mark name, and a current location, a destination, and a passing point from the current location to the destination on the map drawing displayed by the map display means are designated. And a mark display means for displaying the position of the mark on the route guide on the map drawing together with the mark name based on the information stored in the mark information storage means. Map search system, characterized in that the Bei.