JPH04278981A - Method and device for map display - Google Patents

Abstract

PURPOSE:To support the selection of the movement route of a moving means on the ground or the water by an operator by displaying a map, where various movement routes are indicated corresponding to a region range where movement of the moving means on the ground or the water is planned, in a selected scale level. CONSTITUTION:A topographical model is generated from height data and road and river data of a three-dimensional digital map by a topographic model generating means 3, and various movement route plans of the moving means, the distribution of a danger covering range, and the inclination state distribution of topography which are generated by respective generating means and the distribution of land conditions based on land condition data are interactively or selectively indicated on this topographic model, and the optimum movement route is selected from all movement route plans by an optimum movement route indicating means 16 with the moving capability of the moving means, the inclined states on movement routes, distances of movement routes, land conditions on movement routes, danger covering section length on movement routes, and classifications of the danger as discrimination elements and is instructed to an operator.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a map display method and method for assisting an operator in selecting a travel route for a land or water transportation means in accordance with the area in which the land or water transportation means plans to travel. This is related to the device.

0002

2. Description of the Related Art Conventionally, paper maps have been used to select travel routes for land or water transportation based on human intuition. In addition, as seen in car navigation systems, arrows indicating the direction of the destination are shown on a map display to assist in selecting a route for transportation.

[0003] When using a paper map, the slope condition on the travel route, which is the basis for selecting the optimal travel route,
Factors such as the distance of travel routes and the range of threats that travel routes come into contact with were dependent on human estimates. Furthermore, in commercially available navigation systems for automobiles, road data is two-dimensional data composed of latitude and longitude. Due to constraints such as the need for operators to perform operations to guide themselves to their destination in parallel with driving the car, they were only able to provide simple displays such as arrows showing the direction from their current location to their destination. Ta.

0004

[Problems to be Solved by the Invention] Conventionally, as described above, when using paper maps, humans have not been able to estimate the slope of the travel route, the distance of the travel route, and the range of threats that the travel route will come into contact with. Therefore, there were problems in that it was time consuming and the accuracy was poor. Additionally, car navigation systems have the problem of not being able to display the travel route as is or setting a route that deviates from the road due to data or operational constraints.

[0005] The present invention was made to solve the above problem, and is based on the elevation data of a three-dimensional digital map, roads and A terrain model is generated from river data, and on this terrain model, various travel route options for transportation methods, threat ranges, terrain slope distribution, and land condition distribution based on land condition data are selectively shown. , the travel route proposal is determined based on the movement capacity of the means of transportation, the slope condition on the travel route, the distance of the travel route, the land conditions on the travel route, the length of the threat cover section on the travel route, and the type of threat. The purpose of the present invention is to provide a map display method for selecting the optimal travel route from among them and assisting an operator in selecting a travel route for land or water transportation, and a further purpose is to obtain a map display device for this purpose. It is said that

[0006]

[Means for Solving the Problems] In the map display method according to the present invention, three
A terrain model is created from the elevation database of the dimensional digital map and the road and river database of the 3-dimensional digital map, which consists of latitude, longitude, elevation, road or river type, and the scale selected by the operator.・Display a two-dimensional map that is a horizontal projection of the terrain model corresponding to the level, enter the type of means of transportation on land or water, the starting position, and the destination position on the two-dimensional map, and display the input values and roads on the two-dimensional map. Alternatively, based on river data, a proposed travel route along the nearest road or river connecting the starting point and destination of land or water transportation means is calculated, and this is superimposed on a two-dimensional map and the operator If requested by the operator, the slope state of the terrain is calculated from the elevation data, a distribution map is created and this is superimposed on the horizontal plane projection map of the terrain model, and if requested by the operator, the latitude, longitude, land A distribution map of land conditions is created from a land condition database consisting of land use or soil type, and this is superimposed on the horizontal plane projection of the terrain model. When a threat exists, the operator can Enter the type of threat, the location of the threat, and the maximum reachable distance of the threat on the projection map, calculate the threat coverage range, which is the range of the threat, create a distribution map, and use this as a horizontal plane projection of the terrain model. If there is one or more proposed travel routes that the operator has independently devised, input the travel route from the horizontal projection of the terrain model and superimpose it on the horizontal projection of the terrain model. A distribution map of the movement capacity of the means of transportation, inferred from the type of transportation means on land or water, the slope condition of the travel route, the distance of the travel route, the land conditions along the route, and the threat coverage area was created. The optimal travel route is selected and displayed from all possible travel routes, using the length of the threat coverage section on the travel route and the type of threat as determining factors.

The map display device according to the present invention also includes an elevation data storage means for storing an elevation data base of a three-dimensional digital map consisting of latitude, longitude, and elevation; A road and river data storage means for storing a road and river data base of a 3D digital map consisting of river types, and a road and river data storage means for storing a road and river database of a 3D digital map consisting of river types, and a road and river data storage means for storing a road and river database of a 3D digital map; A terrain model generation means for modeling the terrain by interpolating elevation, a scale/level input manual operation means for an operator to select a scale/level, and a terrain model generation means for generating a model according to the selected scale/level. A map display means for generating a two-dimensional map that is a horizontal projection of the terrain model from the terrain model and displaying the generated two-dimensional map on a two-dimensional map display window of a display; and a two-dimensional map displayed on the two-dimensional map display window. From above, the operator inputs the type of transportation means on land or water, the starting position, and the destination position, that is, the transportation means parameters.The operator enters the transportation means parameters from above. travel route generation means for creating a travel route plan along roads or rivers; slope state distribution map generation means for calculating the slope state of the terrain in the terrain model generated by the terrain model means and generating a distribution map thereof; , a threat parameter input manual operation means where, when a threat exists, the operator inputs the type of threat, its location, and the maximum reachable distance of the threat, that is, threat parameters, from a two-dimensional map displayed on a two-dimensional map display window. , a threat coverage distribution map generating means for calculating the range of threats and generating a distribution map in the terrain model generated by the terrain model means, and a land area consisting of latitude, longitude, land use or soil type. land condition data storage means for storing a condition database; land condition distribution map generation means for receiving input land condition data and generating a land condition distribution map; the slope state distribution map generation means; and the threat coverage range. Once storing various distribution maps generated by the distribution map generation means and the land condition distribution map generation means, and selecting a distribution map to be displayed from among them according to an operator's request,
a distribution map display selection means for superimposing zero or more selected distribution maps on the two-dimensional map displayed on the two-dimensional map display window; A manual operation means for inputting a travel route by which an operator inputs the travel route from a two-dimensional map of a terrain model displayed on a two-dimensional map display window, and a movement capability of the transportation means that is inferred from the type of transportation means on land or water. The slope condition on the migration route, the distance of the migration route, the land condition on the migration route, the length of the threat coverage area on the migration route when the distribution map of the threat coverage area is created, and the type of threat are the determining factors, The apparatus is comprised of an optimal travel route indicating means that selects the optimal travel route from among the travel route plans and displays the selected travel route superimposed on the horizontal plane projection of the terrain model displayed on the two-dimensional map display window.

[0008] Furthermore, the means for generating a map display includes a three-dimensional map generating means for generating a three-dimensional map, which is a bird's-eye view of the terrain model, from the generated terrain model,
When an operator instructs display of a three-dimensional map using a manual operation means, the generated three-dimensional map is displayed on a three-dimensional map display window of the display.

[0009] The means for generating the three-dimensional map also includes a viewpoint where the operator arbitrarily specifies the positions of viewpoints and reference points on the two-dimensional map of the terrain model displayed on the two-dimensional map display window. and reference point input manual operation means to regenerate a three-dimensional map of the terrain model according to the viewpoint and reference point specified by the operator, and display the generated three-dimensional map on a three-dimensional map display window. .

[0010] Furthermore, the means for generating a map display includes a cross-sectional view generating means for generating a cross-sectional view of the topographic model from the generated topographic model, and the operator instructs the display of the cross-sectional view by manual operation means. When this happens, the generated cross-sectional view is displayed in the cross-sectional view display window of the display.

[0011] The means for generating the cross-sectional view also includes an operator who arbitrarily determines the positions of two end points of the cross-section and a route connecting therebetween on the two-dimensional map of the topographic model displayed on the two-dimensional map display window. Cross section 2 specified by the operator using a device that includes manual operation means for inputting the specified cross section route.
A cross-sectional view of the terrain model is generated according to the end points and the route connecting between them, and the generated cross-sectional view is displayed in the cross-sectional view display window.

0012

[Operation] As described above, in this invention, a terrain model is generated from elevation data and road and river data of a three-dimensional digital map, and on this terrain model, various travel route plans for transportation means and threat ranges are generated. , terrain slope distribution,
Interactively or selectively shows the distribution of land conditions based on the land condition data, the movement capacity of the means of transportation, the slope condition on the movement route, the distance of the movement route, the land conditions on the movement route, and the land condition on the movement route. The system selects and instructs the operator to select the optimal travel route from among the proposed travel routes, using the length of the threat cover section and the type of threat as determining factors, thereby facilitating operator selection of travel routes for land or water transportation. Realize supporting map display.

Furthermore, in the map display means, in addition to a two-dimensional map that is a horizontal projection of the terrain model, a three-dimensional map or cross-sectional view that is a bird's-eye view of the terrain model is simultaneously displayed, so that the operator can Alternatively, a map display that more interactively or selectively supports travel route selection for water transportation means is realized.

[0014]

[Example] Example 1. FIG. 1 is a block diagram of an embodiment of a map display device according to the present invention. Reference numeral 1 denotes an elevation data storage means for storing an elevation data base of a three-dimensional digital map, which divides the map to be displayed into grids at regular intervals and has elevation data for each grid point. 2 is a road and river data storage means for storing a road and river data base of a three-dimensional digital map, and a road or river data storage means is used to store a road and river data base of a three-dimensional digital map. Or it has river type and its elevation data. 3 is a terrain model generation means, which models the terrain from elevation data extracted from the elevation database and road or river data extracted from the road and river database. Reference numeral 4 denotes a scale level input manual operation means, through which the operator selects the scale level. Reference numeral 5 denotes a two-dimensional map generation means, which generates a two-dimensional map which is a horizontal plane projection of the terrain model from the terrain model generated by the terrain model generation means 3 according to the selected scale level. A map display means 6 displays the generated two-dimensional map on a two-dimensional map display window of the display. Reference numeral 7 denotes a manual operation means for inputting transportation means parameters, in which the operator inputs transportation means parameters, that is, the type, starting position, and purpose of transportation means on land or water, from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. Enter the location. Reference numeral 8 denotes a movement route generation means, which calculates the starting position and destination position of the movement means on land or water based on input values of movement means parameters and road or river data included in the terrain model generated by the terrain model generation means 3. A travel route plan along the nearest road or river connecting the two is created and displayed superimposed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. Reference numeral 9 denotes a slope state distribution map generating means, which calculates the slope state of the terrain based on the elevation data included in the topographic model generated by the topographic model generating means 3, and generates a distribution map thereof. Reference numeral 10 denotes a manual operation means for inputting threat parameters. When a threat exists, an operator inputs the threat parameters, that is, the type of threat, the location of the threat, and the threat from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. This is a manual operation means for inputting the maximum reachable distance. Reference numeral 11 denotes a threat coverage distribution map generation means, which calculates the threat range based on the input value of the threat parameter and the elevation data included in the terrain model generated by the terrain model generation means 3, and generates the distribution map. generate. Reference numeral 12 denotes a land condition data storage means for storing a land condition data base, which has land use or soil type data in a grid pattern with the same regular intervals as the elevation data base. Reference numeral 13 denotes a land condition distribution map generation means, which receives input of land condition data and generates a land condition distribution map. 14 is a distribution map display selection means, which temporarily stores various distribution maps generated by the slope state distribution map generation means 9, the threat coverage range distribution map generation means 11, and the land condition distribution map generation means 13, and displays them from among them. The selected distribution maps are selected according to the operator's request, and the selected zero or more distribution maps are superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. Reference numeral 15 denotes a manual operation means for inputting a travel route, and when there is one or more travel route proposals independently devised by the operator, the 2D map displayed on the two-dimensional map display window of the map display means 6 is displayed.
The operator inputs the travel route from the dimensional map,
The locus of the movement route is superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. Reference numeral 16 is an optimum movement route indicating means, which includes the movement capacity of the means of transportation, which can be inferred from the type of means of transportation on land or water, the slope condition on the movement route, the distance of the movement route, the land conditions on the movement route, and the threat cover. The optimum movement route is selected from all possible movement routes and displayed on the two-dimensional map display means 6 based on the length of the threat coverage section on the movement route and the type of threat when the range distribution map is created. It is displayed superimposed on the two-dimensional map displayed in the map display window.

FIG. 2 is a flowchart showing the overall processing procedure in the map display device configured as described above. First, in S1, the operator
On the two-dimensional map displayed on the dimensional map display window, the transportation means parameters, that is, the type of transportation means on land or water, the starting position, and the destination position, are input using the transportation means parameter input manual operation means 7. In S2, based on the input values of transportation means parameters and the road or river data included in the terrain model generated by the terrain model generation means 3, the nearest road or Automatically generate a travel route plan along the river. In S3, the generated travel route is superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. In S4, the slope state of the terrain is calculated and a distribution map thereof is created. In S5, when a threat exists, the type and location of the threat and the maximum reachable distance of the threat are input, and based on the input values and the elevation data included in the terrain model generated by the terrain model generation means 3. , calculate the range of the threat and generate its distribution map. In S6, a land condition distribution map is generated based on the land condition data extracted from the land condition database. In S7, when there is one or more proposed travel routes that the operator has independently devised, the operator inputs the proposed travel route from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6, and Display the route superimposed on a two-dimensional map. In S8, when we created a distribution map of the movement capacity of the means of transportation, inferred from the type of transportation means on land or water, the slope condition of the travel route, the distance of the travel route, the land conditions on the travel route, and the threat coverage range. The optimal movement route is selected from all possible movement routes, using the length of the threat coverage section on the movement route and the type of threat as determining factors. In S9, the selected optimal travel route is displayed superimposed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6, and is instructed to the operator.

FIG. 3 is a flowchart showing the processing procedure for creating a slope state distribution map, and explains in detail the step S4 in FIG. 2. First, in S10, the slope state of the terrain is calculated based on the elevation data included in the terrain model generated by the terrain model generation means 3. At this time, the slope state of the terrain at each grid point that has elevation data is calculated by comparing the elevation of each grid point with the elevation of surrounding grid points centered on that point. Indicated by direction and degree of inclination. In S11, a slope state distribution map is created that realizes a slope state display showing the type of slope, the direction of slope, and the degree of slope according to the slope state at each grid point. In S12,
The created slope state distribution map is temporarily stored in a storage buffer. In S13, the operator determines whether or not to superimpose and display the slope state distribution map stored in S12 on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. In S14, the slope state distribution map determined to be displayed in S13 is superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6.

FIG. 4 is a flowchart showing the processing procedure for creating a threat coverage distribution map.
This is a detailed explanation of the steps. First, S15
is a determination of whether a threat exists within the area in which the vehicle plans to travel. If the existence of a threat is not recognized, there is no threat coverage range, and the steps from S16 to S22 are invalid. The case where one or more threats exist, that is, the case where steps S16 to S22 are valid will be described below. In S16, the operator inputs the threat parameters related to the existing threat, that is, the type of threat, the location of the threat, and the maximum reachable distance of the threat, using the threat parameter input manual operation means 10. S1
In step 7, the range covered by the threat, that is, the threat coverage range is calculated based on the input value of the threat parameter and the elevation data included in the terrain model generated by the terrain model generation means 3. In this case, the threat coverage range is defined as the area where the line of sight from the threat's location is within the ground surface of the terrain model, which is included in a sphere with the threat's location as the center and the threat's maximum reach distance as its radius. Calculated by subtracting the area occluded by the terrain. In S18, a threat coverage distribution map is created that realizes a threat degree display that indicates the degree of threat according to the type of threat. In S19, the created threat coverage distribution map is temporarily stored in a storage buffer. When there are two or more threats, when storing threat coverage distribution maps for the second and subsequent threats, the newly created threat coverage distribution map is added to the previously stored threat coverage distribution map. S20 is a determination for passing the calculation logic from S16 to S19 on the second and subsequent threats when there are two or more threats. In step S21, the operator displays the threat coverage distribution map stored in step S19 on the two-dimensional map display window of the map display means 6.
This is a decision as to whether or not to display it superimposed on the dimensional map. S2
In Step 2, the threat coverage distribution map determined to be displayed in S21 is superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6.

FIG. 5 is a flowchart showing the processing procedure for creating a land condition distribution map, and provides a detailed explanation of the step S6 in FIG. 2. First, in S23, a land condition distribution map is created based on the land condition data extracted from the land condition database. At this time, colors are used for each type of land condition so that the degree of difficulty of passage depending on the type of transportation method can be clearly displayed. In S24,
The created land condition distribution map is temporarily stored in a storage buffer. In S25, the operator determines whether to superimpose and display the land condition distribution map stored in S24 on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. In S26, the land condition distribution map determined to be displayed in S25 is superimposed and displayed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6.

FIG. 6 is a flowchart showing a processing procedure in which an operator inputs a unique travel route, and provides a detailed explanation of the step S7 in FIG. 2. First, in S27, it is determined whether or not there is a proposed travel route that the operator has independently devised. If there is no movement route plan, there is no unique movement route, so from S28 to S3
Steps up to 0 are invalid. In the following, a case will be described in which there is one or more movement route plans independently devised by the operator, that is, a case in which the steps from S28 to S30 are valid. In S28, the operator inputs one of the travel route plans that he or she has independently conceived from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6 using the travel route input manual operation means 15. In S29, the travel route input by the operator is displayed superimposed on the two-dimensional map displayed on the two-dimensional map display window of the map display means 6. In S30, there are 2 travel route plans created by the operator.
This is a determination to pass the processing logic from S28 to S29 on the second and subsequent movement route plans when there are more than one.

FIG. 7 is a flowchart showing the processing procedure for instructing the optimal travel route, and provides a detailed explanation of the step S8 in FIG. 2. First, in S31, based on the type of transportation means on land or water that the operator inputs from the transportation means parameter input manual operation means 7, the movement capacity of the transportation means is estimated, and the slope of the terrain that the transportation means cannot pass is estimated. Select the degree of turbulence and type of land condition. S32 is a determination as to whether or not a distribution map of the threat coverage range has been created before this step, that is, whether a threat exists or not. The only difference between when a threat exists and when there is no threat is whether or not to include the length of the threat coverage section on the movement route and the type of threat as judgment factors when evaluating the movement route. The case where a threat exists will be explained below. In S33, one travel route to be evaluated is selected from all travel route proposals. In S34, the distance of the selected travel route is calculated. At this time, the movement route is replaced with an approximate route connecting adjacent grid points on the terrain model on the two-dimensional map, and the elevation data at each grid point on the approximate route is added. Replace the root with a set of three-dimensional vectors. In S35, first, the degree of inclination at each grid point on the travel route obtained in S34 is calculated from the degree of inclination at each grid point on the terrain model shown in the slope state distribution map already created by the slope state distribution map generation means 9. Next, the degree of inclination at each grid point on this travel route is compared with the degree of inclination of the terrain that is impossible for the means of transportation determined in S31, and it is determined whether the means of transportation can pass along the route. Check. In S36, first, from the type of land condition at each grid point on the terrain model shown in the land condition distribution map created by the land condition distribution map generation means 13, the land condition at each grid point on the travel route obtained in S34 is determined. Next, the type of land condition at each grid point on this travel route is compared with the type of land condition that is impossible for the means of transportation found in S31 to determine whether the means of transportation can pass along the route. Check whether In S37,
First, the movement obtained in S34 is based on the presence or absence of a threat at each grid point on the terrain model shown in the threat coverage distribution map created by the threat coverage distribution map generation means 11 and the type of threat if present. The presence or absence of a threat at each grid point on the route and, if so, the type of threat are determined, and then the range of consecutive grid points where the existence of the same type of threat is recognized on this movement route is determined. In other words, calculate the total threat coverage interval length, which is the sum of the threat coverage interval length for each type of threat and the threat coverage interval length for each type. In S38, S34
The distance of the movement route calculated in S35, the slope condition on the movement route checked in S35, the slope condition before the land condition on the movement route checked in S36, and the length and total threat coverage section by threat type calculated in S37. Using the threat coverage section length as a determining factor, the selected travel route is evaluated in S33, and the results are recorded. S39 has 2 travel route plans.
This is a determination to pass the calculation logic from S33 to S38 on the second and subsequent travel route plans when there are more than one. In S47, by comparing the results evaluated in S38, the optimum travel route is selected from all the travel route proposals and instructed to the operator.

Example 2. In this embodiment, the means for generating a map display includes means for generating a three-dimensional map that is a bird's-eye view of a terrain model, and if the operator requests, the generated three-dimensional map is displayed on the three-dimensional map display means 6. It is characterized by being displayed on a map display window.

FIG. 8 is a block diagram of this embodiment. 17 is a viewpoint and reference point input manual operation means by which the operator arbitrarily specifies the position of the viewpoint and reference point of the bird's eye view, and 18 is a three-dimensional map that is a bird's eye view of the terrain model according to the viewpoint and reference point specified in 17. This is a three-dimensional map generation means that generates a 3D map. The means for generating a map display in this embodiment has a block configuration in which a viewpoint and reference point input manual operation means 17 and a three-dimensional map generation means 18 are added to the above-mentioned embodiment 1, so that it is possible to display a two-dimensional map. In addition, a three-dimensional map can be displayed. This can be expected to provide a map display that will further assist operators in selecting travel routes for land or water transportation.

FIG. 9 is a flowchart showing the processing procedure for creating a three-dimensional map in this embodiment. First, S
At step 48, the operator instructs the position of the viewpoint and reference point of the bird's-eye view from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6 using the viewpoint and reference point input manual operation means 17. In S49, a three-dimensional map, which is a bird's-eye view of the terrain model, is created from the terrain model generated by the terrain model generation means 3 according to the viewpoint and reference point specified by the operator. In S50, the created three-dimensional map is temporarily stored in a storage buffer. In S51, the operator determines whether or not to display the three-dimensional map stored in S49 on the three-dimensional map display window of the map display means 6. In S52, the 3 that was determined to be displayed in S51
The dimensional map is displayed on the three-dimensional map display window of the map display means 6.

Example 3. In this embodiment, the means for generating a map display includes means for generating a cross-sectional view of the terrain model, and if requested by the operator, the generated cross-sectional view is displayed on the cross-sectional view display window of the map display means 6. It is characterized by

FIG. 10 is a block diagram of this embodiment. Reference numeral 19 denotes a cross-section route input manual operation means by which the operator arbitrarily specifies the positions of the two end points of the cross section of the cross-sectional view and the route connecting therebetween; This is a cross-sectional view generating means for generating a cross-sectional view of a terrain model. The means for generating a map display in this embodiment has a block configuration in which cross-sectional route input manual operation means 19 and cross-sectional view generating means 20 are added to the above-described first embodiment, so that in addition to displaying a two-dimensional map, cross-sectional Diagrams can be displayed. This can be expected to provide a map display that will further assist operators in selecting travel routes for land or water transportation.

FIG. 11 is a flowchart showing the processing procedure for creating a cross-sectional view in this embodiment. First, S5
3, the operator specifies the position of the two end points of the cross section of the cross-sectional view and the route connecting therebetween from the two-dimensional map displayed on the two-dimensional map display window of the map display means 6 using the cross-sectional route input manual operation means 19. In S54, a sectional view of the terrain model is created from the terrain model generated by the terrain model generation means 3 according to the two end points of the cross section designated by the operator and a route connecting therebetween. At this time, the same method as for calculating the altitude on the travel route described in S34 of FIG. 7 can be applied to the calculation of the altitude on the cross-sectional route. In S55,
The created cross-sectional view is temporarily stored in a storage buffer. S
Step 56 is a determination by the operator as to whether or not to display the cross-sectional view stored in S55 in the cross-sectional view display window of the map display means 6. In S57, the cross-sectional view determined to be displayed in S56 is displayed in the cross-sectional view display window of the map display means 6.

Example 4. In this embodiment, the means for generating a map display simultaneously includes means for generating a three-dimensional map, which is a bird's-eye view of the terrain model, and means for generating a cross-sectional view of the terrain model. The three-dimensional map or cross-sectional view is displayed on the three-dimensional map display window or the cross-sectional view display window of the map display means 6.

FIG. 12 is a block diagram of this embodiment. The means for generating a map display in this embodiment is the same as the viewpoint and reference point input manual operation means 17 and 3 in the first embodiment.
Dimensional map generation means 18 and section route input manual operation means 19
Since it has a block configuration including a cross-sectional view generating means 20, it is possible to display a three-dimensional map and a cross-sectional view in addition to a two-dimensional map display. As a result, it is possible to expect a map display that more interactively or selectively supports operators in selecting travel routes for land or water transportation.

[0029]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects.

[0030] A terrain model is generated from the elevation data and road and river data of the three-dimensional digital map, and on this terrain model, various travel route plans for transportation means, distribution of threat coverage, terrain slope distribution, and land Displays the distribution of land conditions based on condition data interactively or selectively, and shows the movement ability of the means of transportation, the slope condition on the movement route, the distance of the movement route, the land conditions on the movement route, and the threats on the movement route. The system supports operators in selecting travel routes for land or water transportation by selecting and instructing the operator the optimal travel route from among possible travel routes based on the length of covered area and the type of threat. Realize map display.

Furthermore, in the map display means, in addition to a two-dimensional map that is a horizontal projection of the terrain model, a three-dimensional map or cross-sectional view that is a bird's-eye view of the terrain model is displayed at the same time. Alternatively, a map display that more interactively or selectively supports travel route selection for water transportation means is realized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a first embodiment of a map display device according to the present invention.

FIG. 2 is a flowchart showing the overall processing procedure in Embodiment 1 of the present invention.

FIG. 3 is a flowchart showing a processing procedure for creating a slope state distribution diagram in the first embodiment of the present invention.

FIG. 4 is a flowchart showing a processing procedure for creating a threat coverage distribution map according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure for creating a land condition distribution map in Embodiment 1 of the present invention.

FIG. 6 is a flowchart showing a processing procedure for inputting a travel route in the first embodiment of the present invention.

FIG. 7 is a flowchart showing a processing procedure for instructing an optimal travel route in Embodiment 1 of the present invention.

FIG. 8 is a block diagram showing a second embodiment of a map display device according to the present invention.

FIG. 9 is a flowchart showing a processing procedure for creating a three-dimensional map in a second embodiment of the present invention.

FIG. 10 is a block diagram showing a third embodiment of a map display device according to the present invention.

FIG. 11 is a flowchart showing a processing procedure for creating a cross-sectional view in Embodiment 3 of the present invention.

FIG. 12 is a block diagram showing a fourth embodiment of a map display device according to the present invention.

[Explanation of symbols]

1. Three-dimensional digital map elevation data storage means 2
Three-dimensional digital map road and river data storage means 3 Terrain model generation means 5 Two-dimensional map generation means 6 Map display means 8 Travel route generation means 9 Slope condition distribution map generation means 11 Threat coverage distribution map generation means 12 Land condition data Storage means 13 Land condition distribution map generation means 16 Optimal movement route instruction means 18 Three-dimensional map generation means 20 Cross-sectional view generation means S1 Movement parameter input processing S2 Movement route generation processing S3 Movement route display processing S4 Slope state distribution map Creation processing S5 Threat coverage distribution map creation processing S6 Land condition distribution map creation processing S7 Movement route input processing S8 Optimal movement route instruction processing S9 Optimum movement route display processing

Claims (6)

[Claims] Claim 1: A map showing the various travel routes of the land or water transportation means in accordance with the regional range in which the land or water transportation means is planned to be traveled is displayed at a selected scale level to enable the operator to use the land or water transportation means. In the map display method to support travel route selection, the following a)
A map display method characterized by displaying a map by processing three-dimensional digital map data in the order of steps . b) From a 3D digital map elevation database consisting of latitude, longitude, and altitude, and a 3D digital map road and river database consisting of latitude, longitude, altitude, and road or river type. (b) Display a two-dimensional map, which is a horizontal projection of the terrain model, in accordance with the scale and level selected by the operator; (c) If the operator requests, display the slope state of the terrain from elevation data; d) input the type of means of transportation on land or water, the starting position, and the destination position on the topographic model; e) Based on the input values and road or river data, create a travel route plan along the nearest road or river that connects the starting point and destination of the land or water transportation means, and use this as the topographic model. c) If requested by the operator, land condition data consisting of latitude, longitude, land use or soil type can be displayed superimposed on the dimensional map.
A distribution map of land conditions is created from the base, and this is superimposed on the two-dimensional map of the terrain model. The maximum reachable distance of the threat is input, and if requested by the operator, the threat coverage area, which is the range of the threat, is calculated, a distribution map is created, and this is superimposed on the two-dimensional map of the terrain model. , h) When the operator has one or more proposed travel routes that he or she has independently devised, input the travel route from the terrain model and superimpose it on the two-dimensional map of the terrain model, and li) display it on the ground or The mobility of the means of transportation that can be inferred from the type of means of transportation on water, the slope condition of the travel route,
Select from all possible migration routes based on the distance of the migration route, the land conditions along the migration route, the length of the threat coverage area on the migration route when the distribution map of the threat coverage area is created, and the type of threat. Select and display the optimal travel route. [Claim 2] A map showing various travel routes for the area where the land or water transportation means is planned to be moved is displayed at a selected scale level, and the operator can move the land or water transportation means. In the map display device to support route selection, the following 1) ~
16) A map display device comprising: 1) An elevation data storage means for storing an elevation database of a 3D digital map consisting of latitude, longitude, and altitude; 2) A 3D digital map consisting of latitude, longitude, altitude, and road or river type. 3) a road and river data storage means for storing a road and river data base; 4. Terrain model generation means for modeling;
5) a scale level input manual operation means for an operator to select a scale level; 6) a two-dimensional map generating means for generating a dimensional map; 6) a map display means for displaying the generated two-dimensional map on a two-dimensional map display window of a display; and 7)
On the terrain model generated by the map model generation means,
a transportation means parameter input manual operation means by which an operator inputs the type of transportation means on land or water, a starting position, and a destination position, that is, transportation means parameters; and 8) generation of input values of transportation means parameters and the terrain model generation means. Based on the road or river data included in the topographical model, a travel route plan is created along the nearest road or river that connects the starting point and destination of the land or water transportation means, and this is used in the two-dimensional map. a travel route generating means for superimposing display on a two-dimensional map displayed on a display window; 9) calculating the slope state of the terrain based on elevation data included in the terrain model generated by the terrain model generating means; 10) When a threat exists, an operator can display the type and position of the threat and the maximum extent of the threat on the terrain model generated by the terrain model generation means. a threat parameter input manual operation means for inputting the reach distance, that is, the threat parameter; 11) determining the range of the threat based on the input value of the threat parameter and the elevation data included in the terrain model generated by the terrain model generation means; 12) land condition data storage means for storing a land condition database consisting of latitude, longitude, land use or soil type; 13) ) land condition distribution map generation means for receiving input of land condition data and generating a land condition distribution map; 14)
temporarily storing various distribution maps generated by the slope state distribution map generation means, the threat coverage range distribution map generation means, and the land condition distribution map generation means, and selecting a distribution map to be displayed from among them according to an operator's request; 15) distribution map display selection means for superimposing and displaying the selected zero or more distribution maps on the two-dimensional map displayed on the two-dimensional map display window;
When the operator has one or more proposed travel routes that he or she has independently devised, the operator inputs the travel route from the two-dimensional map displayed on the two-dimensional map display window, and the locus of the travel route is displayed on the two-dimensional map. 16) the movement capability of the means of transportation, which can be inferred from the type of means of transportation on land or water, the inclination of the route, the distance of the route;
The optimal movement route is selected from among the movement route proposals, using the land conditions along the movement route, the length of the threat coverage section on the movement route when the threat coverage distribution map is created, and the type of threat. means for generating a map display, the means for generating a map display comprising an optimum travel route indicating means superimposed on the two-dimensional map displayed on the two-dimensional map display window; 3. The means for generating a map display includes a three-dimensional map display means for generating a three-dimensional map, which is a bird's-eye view of the terrain model, from the generated terrain model, and the operator can manually display the three-dimensional map. 3. The map display device according to claim 2, wherein the generated three-dimensional map is displayed in a three-dimensional map display window of the display when a display instruction is given. 4. The means for generating the three-dimensional map is configured to generate a viewpoint and a reference point where an operator arbitrarily specifies positions of viewpoints and reference points on the two-dimensional map of the terrain model displayed on the two-dimensional map display window. Claim 3, further comprising a reference point input manual operation means, for regenerating a three-dimensional map of a terrain model according to specified viewpoints and reference points, and displaying the generated three-dimensional map on a three-dimensional map display window. Map display device as described in section. 5. The means for generating a map display includes cross-sectional view generating means for generating a cross-sectional view of the topographic model from the generated topographic model, and when an operator instructs display of the cross-sectional view by a manual operation means. 3. The map display device according to claim 2, wherein the generated cross-sectional view is displayed in a cross-sectional view display window of a display. 6. The means for generating the cross-sectional view comprises:
2 of the terrain model displayed on the dimensional map display window
The system includes a cross-section route input manual operation means by which an operator arbitrarily specifies the position of two cross-section end points and a route connecting them on a dimensional map, and generates a cross-sectional view of a terrain model according to the specified two cross-section end points and a route connecting therebetween. 6. The map display device according to claim 5, wherein the generated cross-sectional view is displayed in a cross-sectional display window.