JP3972541B2 - Map display method and map display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a map creation and display method for expressing information of a target having a plurality of attributes in two dimensions or three dimensions. In particular, the present invention relates to a method for creating a time map according to the time required from various transportation information to a target. Further, the present invention relates to a method for supporting the evaluation of real estate properties using a time map when a large amount of real estate property information also exists.
[0002]
[Prior art]
As conventional techniques related to the present invention, the following (1) Concentric circle display method, (2) Shortest path display method, (3) Wide range map display method, (4) Euclidean distance map display method, (5) Fixed time There is a map.
[0003]
(1) Concentric circle display method on the map
As a conventional method for displaying the required time to the target on the map, there is a method of displaying the range that can be reached in the same time on the map by connecting them with lines like contour lines. For example, according to Japanese Patent Laid-Open No. 9-101746, “Map or Map Record”, “It is impossible to determine the time required for a conventional map at a glance. There was a problem that there was only calculation, and a special tool was required.A map centering on one point on at least one station in a map with one or more stations and the geographical information around it. Or it is a map characterized by arcs. "
[0004]
(2) Shortest path map display method
As a conventional method for displaying a route to a target, there is a method of searching for the shortest route to the target in consideration of various transportation modes and displaying a route map of the shortest route. For example, according to Japanese Laid-Open Patent Publication No. 10-31418 “Automatic Guidance System Device”, a conventional guidance system needs to be checked with a map, a timetable or the like in order to input the departure and destination station names, for example, for trains. In addition, it has the disadvantage that it is provided with the travel route, travel time or fare to the destination station, but it does not know about the travel from the destination station to the final destination. By providing transportation network information in the database, simply enter the address of the departure and destination, and automatically calculate the travel route, travel time or fare to the destination indicated by the address and output it with the entire map regardless of the mode of transportation. It is to provide a system unit. "
[0005]
(3) Wide range map display method
As a conventional technique for efficiently displaying a wide range of maps, there is a technique using fisheye vision. The fish-eye method is a method in which a map near the focal point is displayed in detail, and the map is compressed and displayed further away from the focal point. For example, according to Japanese Patent Application Laid-Open No. 8-328467 “Map Display Device in Navigation Device”, a road map based on coordinates given distortion according to the distance from the focal point can be displayed. The map near the focal point is displayed in detail, and as it goes away from the focal point, it gradually changes to a compressed display, and it can be displayed as if viewed with a fisheye lens. "
[0006]
(4) Euclidean distance map display method
The map display method generally used is a method of arranging a target based on the Euclidean distance to the target.
[0007]
(5) Fixed time map
When limited to a paper map, there is a time map using time as an index. For example, there is a time map in which the departure point is set at Tokyo Station, the transportation facility is set to railroad, and the target is set to stations all over Japan.
[0008]
[Problems to be solved by the invention]
Depending on the required time to the target is the time distance, and other than that, for example, there is a fuel consumption distance in an automobile. Depending on the terrain, the calculation method of the fuel consumption distance changes due to the performance uphill and cornering performance. The reason why the fuel efficiency distance cannot be simply replaced with the Euclidean distance is that the object has a plurality of attributes.
[0009]
When searching for real estate properties, there are many people who request to find a room in a place close to the company or school (a place that can be reached within 30 minutes), and one of the factors for selecting a real estate property is commuting to school Time can be given. However, since it is necessary to consider various transportation modes and their connections, it is difficult and laborious to search for a real estate property by hand. Moreover, real estate properties cannot be selected based on factors such as commuting time. Selection criteria are often shaken by various attributes such as rent and layout. On the other hand, real estate property intermediaries make a profit by mediating between property property owners and customers. Therefore, although you want to advertise a real estate property, in order to avoid the risk that the customer will negotiate directly with the owner of the real estate property, you cannot unnecessarily present the exact location of the real estate property or the surrounding map to the customer. It was. However, by using the time map, customers can easily sort real estate properties by commuting / commuting time, and real estate brokers can avoid risks and provide accurate maps to customers. It can provide services beyond showing.
[0010]
For the purpose of visually representing the distance between an arbitrary reference point and a target having a plurality of attributes, (1) a concentric circle display method on a map and (2) a shortest path map display method, a distance calculation method Was inadequate or the distance could not be visualized. Further, in (3) the wide area map display method and (4) the Euclidean distance map display method, the distance between the reference point and the target can be calculated only by the Euclidean distance. And (5) In the fixed time map, the reference point had to be specified, and there was no flexibility. For example, (1) The concentric circle display method on the map can only calculate the time distance limited to walking, and (2) The shortest route map display method can display multiple results visually. And (3) Wide range map display method and (4) Euclidean distance map display method can calculate only Euclidean distance, and (5) Fixed time map is only a time map that specifies the reference point and means of transportation. There wasn't.
[0011]
A first object of the present invention is to define a method for calculating a distance between a reference point and a target having a plurality of attributes, and to visually represent the distance calculated by the defined method. The concept of distance is inherently diverse. A second object of the present invention is to provide a system that supports evaluation of real estate properties using a time map instead of an actual map.
[0012]
[Means for Solving the Problems]
The object of the present invention is achieved by the following method. The target object placement method of the present invention includes a process for searching for various information about a target object, a process for calculating a distance from a target object having a plurality of attributes based on a certain index, and a map for a target object based on the calculated distance. Consists of processing to be placed on top.
[0013]
By using the method of the present invention, it is possible to construct a system for supporting the evaluation of real estate properties. The real estate property evaluation support system searches the transportation database. Next, the time distance from the reference company or school to each transportation platform is calculated. And the time map which has arrange | positioned the target object based on the time distance is displayed on a display. The user selects candidates for a place to search for a real estate property with reference to this time map, and searches for the real estate property by adding conditions such as a rent and a floor plan. The user selects a real estate property that he / she wants to know in detail from the search result list. The real estate property evaluation support system creates a time map based on the time distance from the target property selected by the user to the target and displays it on the display.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Three embodiments of the present invention will be described in detail below with reference to the drawings. A general-purpose time map creation method is the first embodiment, and a target placement method when searching for a real estate property is the second embodiment. A target arrangement method for providing taxi information to taxi passengers is the third embodiment.
[0015]
FIG. 1 is a diagram showing an outline of processing in the first embodiment. In FIG. 1, this embodiment is constituted by a time map creation module 100, a map database 106, an application-dependent database 108, and a transportation system database 107, and these are collectively referred to as a time map creation system. The module shown in FIG. 1 is executed by a computer, and a time map as an execution result is displayed on the display.
[0016]
The time map creation module 100 is composed of the following steps. First, in step 101, the time map creation module 100 reads a search condition designated by a user such as a place or a used transportation facility (a search condition reading process). Next, in step 102, the time map creation module 100 refers to the map database 106, the application-dependent database 108, and the transportation agency database 107, and reads the referenced data (reference information reading process). In step 103, the time map creation module 100 calculates a time distance to the target in consideration of connections between a plurality of transportation facilities (time distance calculation processing). In step 104, the time map creation module 100 creates a time map based on the time distance to the target (time map creation processing). Finally, in step 105, the time map creation module 100 outputs the created time map 110 to the display (time map output process). Here, the output device may be a printer. Furthermore, it is easy to process application-dependent data included in the application-dependent database 108 and display it in combination with a time map. It is also possible to easily supplement map data with a time map (time map complement processing). The time map creation system further creates and displays another new time map 111 with one point on the created time map 110 as a reference point by interactive processing with the user.
[0017]
FIG. 2 is a diagram showing the detailed configuration of the map database 106, the application-dependent database 108, and the transportation facility database 107.
[0018]
A map database 106 shown in FIG. 2A is data representing a map of a city area and the like, and includes a road network data table 120 and a mesh data table 121. The road network data is data for constituting a road network having intersections as nodes. The road network data table 120 is composed of fields of intersection ID, position, and connected intersection ID. The mesh data is obtained by dividing an image map into a mesh shape. The mesh data table 121 includes a mesh number field, an upper left corner of the mesh, a lower right corner of the mesh, an adjacent mesh, and an image file name.
[0019]
The application-dependent database 108 shown in FIG. 2B is a database of data required for each application, and is prepared for each application. For example, taking the case of real estate property search as an example, the real estate property information table 122 is composed of fields of real estate property information such as address, rent, and floor plan of the real estate property.
[0020]
The transportation database 107 shown in FIG. 2C is information for using transportation, and includes a transportation management information table 123 and a route management information table 124. The transportation management information table 123 includes data relating to transportation such as buses and trains associated with the positions of the landings. The transportation facility information table 123 is composed of landing name, latitude and longitude, transportation facility name, timetable, and route fields. Data for these fields is stored in the transportation database for all transportation platforms. The route management information table 124 includes data relating to routes from landing points to landing points in each transportation facility. The route management information table 124 includes fields of departure point, arrival point, transportation name, required time, and amount.
[0021]
FIG. 3 is a diagram showing detailed processing contents of the first embodiment, which are executed in the following steps. In step 201, the time map creation module 100 reads the user search conditions. Step 201 corresponds to the search condition reading process 101 of FIG. In step 202, the time map creation module 100 reads map data and application-dependent data from the map database 106 and the application-dependent database 108. In step 203, the time map creation module 100 extracts keywords corresponding to transportation names such as “bus” and “subway” from the search condition. Then, the time map creating module 100 searches the transportation information from the transportation database 107 using the keyword as a search key. Steps 202 and 203 correspond to the reference information reading process 102 in FIG. In step 204, the time map creation module 100 sets the current position / current time based on an input from the user. The current position may be a position sensor such as GPS, and the current time may be a computer timer. In step 205, the time map creation module 100 refers to the read road network data 120 and searches for a route to the transportation platform near the current position. Here, a criterion for calculating the time distance by walking is set in advance, and the time map creation module 100 calculates the time distance of the route to the transportation platform based on this criterion (walking time distance calculation processing). ). In step 206, the time map creation module 100 searches for a route to the target in consideration of connections between a plurality of transportation facilities, and calculates the time distance (route time distance calculation processing). Step 204, step 205, and step 206 correspond to the time distance calculation process 103 in FIG. In step 207, the time map generation module 100 plots the transportation platform on the white time map based on the time distance while maintaining the direction of the transportation platform. Here, the white time map refers to a time map in which no target is placed. Step 207 corresponds to the time map creation processing 104 of FIG. In step 208, the system outputs the created time map to the display. Step 208 corresponds to the time map output process 105 of FIG.
[0022]
FIG. 4 is a more detailed processing flow of the walking time distance calculation processing 205 described in FIG. 3 of the first embodiment. This function calculates the time distance from the reference point to the nearest transportation platform on foot. With this function, the time map creation system can create a time map with an arbitrary place as a reference point.
[0023]
In step 301 of FIG. 4, the time map creation module 100 sets a transportation platform closest to the current position at the Euclidean distance as a target. In step 302, the time map creation module 100 searches for the shortest route from the current position to the target with reference to the road network data 120 included in the map database 106. As the shortest route search technique, for example, JP-A-11-173863 “Route Search Method” may be used. In step 303, the time map creation module 100 calculates the distance of the searched shortest route. In step 304, in order to calculate the time distance, the time map generation module 100 calculates the time distance to the target based on a preset criterion. Here, the reference set in advance is a mathematical formula for converting the Euclidean distance into a time distance. For example, if the formula “1 km = 10 minutes on foot” is preset and the shortest path distance is measured as 500 m, the time map creation module 100 calculates the time distance to the target as 5 minutes on foot. . In step 305, the time map creation module 100 checks whether the time distance of the shortest route is within the user-specified range. When the time distance of the shortest route is within the user specified range, the time distance is associated with the target and the target is stored. In step 306, the time map creation module 100 updates the target and returns the process to step 302. If it is outside the user-specified range, the time map creation module 100 ends the walking time distance calculation processing 205. The targets stored in the time / distance creation module 100 are a set of transportation platforms that can be reached on foot.
[0024]
FIG. 5 is a more detailed processing flow of the route time distance calculation processing 206 described in FIG. 3 of the first embodiment. First, in step 401, the time map creation module 100 initializes variables in the legend in FIG. In step 402, the time map creation module 100 sets the current position BP as the departure point SP (SP = BP). In step 403, the time map generation module 100 confirms whether there is a place R [i] that can be reached from the departure point SP and there is a place that has not been searched from the departure point SP (R []! = Φ and F [i]! = SP). Here, the transportation means used to reach the starting point or the transportation platform that can be reached on foot is defined as the reachable place. For example, when there is a railway station that can be reached on foot from a bus stop, the time mapping module 100 can reach the next bus stop that can be reached from the bus stop using a bus and the station that can be reached on foot. A place. However, when using a transportation means other than walking, the time map creation module 100 refers to the timetable field of the transportation management information table 108 and confirms that the transportation is operating after the estimated time.
[0025]
If there is a reachable location that meets the conditions in step 403, in step 404, the time map generation module 100 sets one of the reachable locations as the target EP (EP = R [i]). The starting point SP is set to the starting point F [i] immediately before the target EP (F [i] = SP). In step 405, the time map creation module 100 refers to the route management information table 124 and searches for the time distance T from the departure point SP to the target object EP (T = Time). In step 406, the time map generation module 100 calculates a time distance (Tmin [j] + T) obtained by adding the detected time distance T to the shortest time distance Tmin [j] to the starting point from the current position BP. Time distance to the object EP. However, when using a transportation facility, the time map creation module 100 adds the waiting time at the transportation facility to the time distance. Then, the time map creation module 100 compares the calculated time distance (Tmin [j] + T) with the shortest time distance Tmin [i] to the target EP. If the calculated time distance is shorter, in step 407, the time map generation module 100 records the calculated time distance as the shortest time distance from the current position BP to the target EP (Tmin [i] = Tmin [j] + T).
[0026]
In step 408, the time map creation module 100 stores the departure point SP as a route branch point (B [m] = SP) and stores the target EP as a new departure in order to store the route taken. Set to point SP (SP = EP). Then, the time map creation module 100 returns the process to step 403. If the calculated time distance is longer in step 406, in step 410, the time map generation module 100 sets the immediately preceding route branch point as the starting point (SP = B [m]), and the process is stepped. Return to 403. If there is no reachable place in the condition in step 403, in step 409, the time map generation module 100 checks whether or not the current position BP is the departure point SP (SP = BP). If the current position is not the starting point, the time map creation module 100 advances the process to step 410. If the current position is the reference point, the time map creation module 100 ends the route time distance calculation process 206. By the route time distance calculation process by this depth priority search method, the shortest time time for each reachable target can be calculated.
[0027]
FIG. 6 is an example of a screen displayed on the display by the time map creation module 100 in the time map output process 105 of the first embodiment. A screen example 501 in FIG. 6 is a time map with the current position as a reference point. The time map creation module 100 arranges each target at a position corresponding to the time distance on the white time map, and displays the time distance for each target. At this time, the target is placed in consideration of the direction with respect to the current position. Then, the time map creation module 100 connects the current position (center) and each target with arrows. The time map creation system sets an arbitrary point on the displayed time map as a new reference point through interactive processing with the user, and creates and displays a detailed and local time map at the reference point. For example, when the user clicks “Azamino” with the mouse in the time map of the screen example 501, the time map creation system creates a local time map with “Azamino” as a reference point and displays it in a separate window. (Screen example 502). Similarly, in the time map of the screen example 501, when the user clicks “groove mouth” with the mouse, the time map creating system creates and displays a local time map with “groove mouth” as a reference point.
[0028]
In the above embodiment, an example of creating a time map with the time from the current position to the target as a scale has been shown, but creating a toll map with the traffic charge required to reach the target from the current position as a scale You can also. As described above, according to the present invention, it is possible to calculate the distance based on various attributes relating to the target and visually display the result.
[0029]
FIG. 7 is a diagram illustrating an example of a time map complement process that is performed in the time map output process 105 according to the first embodiment and supplements the time map with map data. In the time map complement process, the time map is complemented using the mesh data 121 included in the map database 106. In the time map complementing process, the triangular area of the mesh data is transformed and complemented so as to correspond to the triangular area of the time map. On the mesh data 601, the time map complementing process is a vertex set obtained by adding the current position to the transportation facility, and the mesh data area is divided into triangular partial areas based on the vertex set. In the time map complementing process, for an arbitrary triangular area, three points on the time map 603 corresponding to the apex of the triangular area are detected. In the time map complementing process, the triangular area of the three-point time map is compared with the triangular area of the mesh data, and the triangular area of the mesh data is deformed so that the corresponding vertices overlap. For example, from the triangular area 602 composed of vertices A, B, and C and the triangular area 604 composed of points A ′, B ′, and C ′ on the time map corresponding to points A, B, and C, the time map complementing process is The internal point of the triangular area 602 is converted into the internal point of the triangular area 604, and the time map is supplemented with the map data between the transportation facilities. Conversely, it is also possible to easily plot places that can be reached at the same time on the map.
[0030]
FIG. 8 is an explanatory diagram of the detailed processing contents of the second embodiment. Hereinafter, the system of the second embodiment is referred to as a real estate property evaluation support system. In step 701, the real estate property evaluation support system enlarges / reduces / moves the map displayed on the display by interactive processing with the user and searches for the designated real estate property (for example, a company or school). Etc.) (screen example 711). In step 702, the real estate property evaluation support system confirms with the user whether or not a condition for creating a time map for the stored reference point is designated. If the condition is designated, in step 703, the real estate property evaluation support system stores the condition designated by the user. For example, the user designates conditions such as “buses and trains to be used only for transportation” and “one-way travel time is within one hour”. In step 704, the real estate property evaluation support system creates a time map based on the conditions (screen example 712). This is the same processing as steps 101 to 105 in FIG. In the real estate property evaluation support system, the real estate property database corresponds to the application-dependent database 108 in FIG.
[0031]
In step 705, the real estate property evaluation support system confirms with the user whether or not a condition for searching for a real estate property is designated. If the condition is designated, in step 706, the real estate property evaluation support system stores the condition designated by the user. For example, the user designates conditions such as “how much the rent is” and “completely equipped with air conditioning”. In step 707, the real estate property evaluation support system searches for real estate properties based on the designated conditions, and displays a list of search results (screen example 713). One property is selected from the result list by the user, and in step 708, the real estate property evaluation support system confirms whether or not to specify a display item when displaying a time map with the selected property as a reference point. When the display item is designated, in step 709, the real estate property evaluation support system stores the condition designated by the user. In step 710, the real estate property evaluation support system creates a time map with the designated target property as a reference point and displays it in a separate window (screen example 714). This is also the same processing as steps 101 to 105 in FIG.
[0032]
Screen examples 711 to 714 in FIG. 8 are screen examples of the second embodiment. In screen example 711, the user selects an area on which to search for real estate properties on the map. At this time, the user can enlarge the map by selecting a rectangle on the map with the mouse and pressing the enlarge button. Furthermore, when the user selects a point on the map with the mouse and presses the enter button, the location can be set as a reference point. In the screen example 712, a time map centering on the reference point is displayed. The user can change which time zone the time map is displayed by selecting an arbitrary time from the list box at the upper left of the time map. By referring to this time map and referring to how long and how long it is possible to go, the user searches for a real estate property by specifying a location and other conditions. When the user presses a time map display button from the list of search results displayed in the screen example 713, a local time map with the property as a reference point is displayed. As shown in the example screen 714, what kind of shop is located in the vicinity of the target property about a few minutes on foot is displayed.
[0033]
FIG. 9 is a screen example of the third embodiment. Hereinafter, the system of the third embodiment is referred to as a taxi calling system. The time map creation method in the taxi calling system is the same procedure as in the first and second embodiments. The taxi calling system is installed inside the taxi and provides customers with services that apply time maps. A taxi user operates a touch panel display installed inside the taxi. The taxi calling system is equipped with a position sensor. First, the taxi call system displays a map around the taxi on the display. In the screen example 801, the taxi user designates the destination on the map displayed on the display and presses the enter button. In the example screen 802, the taxi call system displays a time map with the taxi position as a reference point until it reaches the destination. The taxi calling system displays not only the destination but also the location around the current location, and the time and amount of money it takes to stop at that location. In the screen example 803, the taxi user selects a place where he / she wants to stop from the time map. Here, it is easy to automatically update the route by transmitting information on the stop-by location designated by the taxi user to the car navigation system on the driver's seat side.
[0034]
As a function common to all the embodiments, an example of a method for automatically measuring a required time from automatically measuring a required time from one place to another and storing it in a database will be described. The vehicle uses satellite communication to send the vehicle position information to the required time automatic measuring device. The required time automatic measurement device records the sent vehicle position information in association with the current time. By focusing on one recorded car with respect to the recorded information, the time required automatic measurement device can calculate the time required for the car to travel in a certain section. The required time automatic measuring device stores the calculated time in the database as the required time of the section by car. By using the required time automatic measurement method, it is possible to measure the required time at the current time and automatically update the database.
[0035]
A program for executing the target object arranging method of the present invention described above is stored in a computer-readable recording medium, and loaded into the main memory at the time of execution.
[0036]
【The invention's effect】
According to the present invention, a distance calculation method based on one or more attributes is defined for a target having a certain reference point and a plurality of attributes, and the distance calculated by the defined method is visually represented. Thus, the user can compare the target from various viewpoints.
[0037]
In the real estate property evaluation support system according to the present invention, the user can set an arbitrary place as a reference point, or specify a time zone and a transportation system, and the system creates a time map based on these conditions, An effective time map customized for each user can be provided.
[0038]
In the taxi stop providing system according to the present invention, the time distance to a nearby store is calculated using the current position of the taxi as a reference point, and the store is a target, and additional time and additional time when stopping at the target A convenient time map showing the amount of money can be provided.
[0039]
The automatic update method of the required time database using satellite communication according to the present invention makes it possible to easily acquire the required time in a certain section, and to create and provide a convenient and effective time map to the user. it can.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration and processing outline of a first embodiment.
FIG. 2 is a diagram illustrating a configuration of a database according to the first embodiment.
FIG. 3 is a diagram showing detailed processing contents of the first embodiment.
FIG. 4 is a diagram illustrating detailed processing contents of a walking time distance calculation process according to the first embodiment;
FIG. 5 is a diagram illustrating detailed processing contents of a route time distance calculation processing according to the first embodiment;
FIG. 6 is an example of an output screen in the time map output process of the first embodiment.
FIG. 7 is a diagram illustrating an example of a time map complement process according to the first embodiment.
FIG. 8 is an explanatory diagram of detailed processing contents of the second embodiment.
FIG. 9 is a screen example of the third embodiment.

Claims (6)

In a map display method for displaying map information based on a required time on a display device using a computer,
A storage device stores a map database storing road network data defining road networks with intersections as nodes and mesh data obtained by dividing an image map, and real estate property information including real estate address, rent, and floor plan fields Real estate property information database, transportation management information that defines the location and route of each transportation platform, and route management information that defines the time required to use the transportation from the departure point to the arrival point of transportation And a transportation database that stores
The accepting means of the computer accepting an input of a search condition including transportation ,
The calculating means of the computer calculates a required time from the current position to each target ;
Creating means of the computer, the reference to the current position, the current said each target from the position at a position corresponding to the required time to each target was placed on the map expressed by the required time And creating the map information,
The computer display means displays the map information expressed by the required time on the display device, the real estate property information is displayed on the map information expressed by the required time , and the computer complement means And supplementing the map information represented by the required time using the mesh data,
In the calculating step, the road network data and the mesh data are read from the map database, the real estate property information is read from the real estate property information database, and traffic from the transport database is used as a search key as a search key. Search the engine management information and the route management information, refer to the road network data, search for a route to a transportation platform near the current position, calculate the Euclidean distance along the route, and calculate the unit Euclidean distance Using a standard that defines the required time per route, the first required time is calculated from the Euclidean distance, the route from the transportation platform to each target is searched, and the route management information is referred to , detects the second required time to the respective target from the landing of the transport And, the first required time and by adding the second required time, calculates the time required until the respective target from the current position,
The complementing step divides the mesh data area into triangular partial areas with the current position and the transportation platform as vertices, and a map represented by the required time corresponding to the vertices of the triangular partial areas. Detecting the upper point, transforming the triangular partial region of the mesh data so that the vertex of the triangular partial region of the mesh data overlaps the point on the map represented by the required time , and the transportation The map display method characterized by complementing the map information expressed by the said required time using the said mesh data between the boarding points of the. The map display method according to claim 1,
The road network data includes fields of intersection ID, position and road intersection ID,
The mesh data includes a mesh number field, an upper left corner of the mesh, a lower right corner of the mesh, an adjacent mesh, and an image file name field .
The transportation management information includes a field of transportation platform name, latitude and longitude indicating its position, transportation name, timetable, and route,
2. The map display method according to claim 1, wherein the route management information includes fields for a departure point, an arrival point, a transportation name, a required time, and an amount of money. In the map display method according to claim 1 or 2,
Wherein the step of calculating the set target of one of the possible locations reach from the departure point point, by referring to the path management information, the second required time from the departure point to the target searching, the newly adding the second required time to search for in the second required time to departure point, and set the target to the departure point, arrival from the departure point point The map display method, wherein the second required time is searched from the transportation platform to each target object by repeating the search and addition of the second required time until there is no possible place. In a map display device that displays map information based on the required time on the display device,
Real estate information stored with the map database storing the mesh data obtained by dividing the road network data and image map that defines the road network as a node of an intersection, real estate Adress, rent, the real estate information including fields of floor plan Stored database, transportation management information that defines the location and route of each transportation station, and route management information that defines the time required to use the transportation from the departure point to the arrival point. A storage means having a transportation database;
Input means for accepting an input of search conditions including transportation, and is connected to the input means, to calculate the time required to each target from the current position, based on the said current position, the respective target from the current position each of said target at a position corresponding to the time required to the object, and disposed on the map expressed by the time required to create the map information, said display map information represented by the time required is displayed on the device, the real estate listing information in the map information represented by the required time, and control means to complement a map information represented by the required time by using the mesh data,
Said control means, said reading the road network data and the mesh data from the map database, the real estate information read the real estate information from the database, transportation from the transportation database the transportation of the search condition as a search key Search the management information and the route management information, refer to the road network data, search for the route to the transportation platform near the current position, calculate the Euclidean distance along the route, and calculate per unit Euclidean distance Using the standard defining the required time , calculate the first required time from the Euclidean distance, search the route from the transportation platform to each target, refer to the route management information, Find the second required time from landing of the transport to the respective target, before By adding the first required time and the second required time, it calculates the time required until the respective target from the current position,
The control means divides the mesh data area into triangular partial areas with the current position and the transportation platform as vertices, and the map is represented by the required time corresponding to the vertices of the triangular partial areas. And the triangle partial area of the mesh data is transformed so that the vertex of the triangular partial area of the mesh data is superimposed on a point on the map represented by the required time , A map display device characterized in that the map information expressed by the required time is complemented using the mesh data between the landings. The map display device according to claim 4,
The road network data includes fields of intersection ID, position and road intersection ID,
The mesh data includes a mesh number field, an upper left corner of the mesh, a lower right corner of the mesh, an adjacent mesh, and an image file name field .
The transportation management information includes a field of transportation platform name, latitude and longitude indicating its position, transportation name, timetable, and route,
The map display device characterized in that the route management information includes fields of a departure point, an arrival point, a transportation facility name, a required time, and an amount of money. In the map display device according to claim 4 or 5,
It said control means sets the target one of the possible locations reach from the departure point point, by referring to the path management information, the second required time from the departure point to the target search, the newly adding the second required time to search for in the second required time to departure point, and set the target to the departure point, reachable locations from the departure point The map display device is characterized in that the second required time from the transportation platform to each target is searched by repeating the search and addition of the second required time until there is no more.

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