JP2004333993A - Stereoscopic map display device and method by stereo photography system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems with a stereoscopic map by a stereoscopic photography system wherein two maps are always made into a pair and are stereoscopically viewed by both eyes, and therefore the maps are required to be juxtaposed within the pupil width of both eyes and the range of a visual field is limited. <P>SOLUTION: Unless there is an external input by clicking, etc., of a mouse 125, only the mother map A121 is displayed. When a user clicks the arbitrary point of the mother map A viewed as the stereoscopic map by the mouse 125, a mother map A display window 123 and a mother map B display window 124 are displayed on the display and by viewing the mother map A display window 123 and the mother map B display window 124 with both eyes, the user is able to stereoscopically view the map and therefore the range limitation of the visual field is released. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stereoscopic map display apparatus and a stereoscopic map display method that enable stereoscopic viewing of a map with the naked eye using a stereo photography method.
[0002]
[Prior art]
Generally, a map displays the topographical position of a terrain or a feature on a piece of paper, but what is called a topographic map is not only two-dimensional information such as terrain and features, but also terrain Height information (three-dimensional information) is also included. In a topographic map, height information is generally expressed by contour lines.
[0003]
Contour lines of the topographic map are created by photogrammetry. Photogrammetry is based on aerial photographs taken while shifting the position, using the principle of three-dimensional photography, the position difference (parallax) of the same feature in a pair of photos is measured with a plotter, and the height of the feature is measured. Get information about
In recent years, even in map creation, a three-dimensional map called a 3D map, which has three-dimensional information different from the contour line representation of a terrestrial feature using a computer technology, has become popular. Representative examples include a bird's eye view and a stereoscopic map. A bird's-eye view is a computer-based calculation of a scene looking at the terrain diagonally from a certain height. A stereoscopic map is intended to be three-dimensionally represented by computer technology using a conventionally known principle of stereoscopic vision. Further, there are various methods for implementing a three-dimensional expression, and typical methods include an anaglyph method using residual color glasses, a method using polarized glasses, a stereo photograph method using naked eyes but using two maps, There is a hologram method.
[0004]
[Non-Patent Document 1] "General View of Geodesy", Geodetic Society of Japan, 1974, p. 386
[0005]
[Problems to be solved by the invention]
Among the topographic maps described above, the present invention relates to a stereoscopic map using a stereo photography method. A method of using a stereoscopic map by the stereo photography method will be described with reference to FIGS. First, as shown in FIG. 15, a photograph 150 in which the subject A 152 and the subject B 153 are photographed and a photograph 151 in which the subject A 152 and the subject B 153 are photographed from a point shifted by a certain distance from the photographing point of the photograph 150 are arranged on the left and right. I do. At this time, the distance 157 between the subject A and the subject B, which is the distance between the subject A155 and the subject B156 photographed in the photograph 151, and the distance 154 between the subject A and the subject B photographed in the photograph 150, depend on the angle at which the photographing is performed. In the following description, the difference between the distance 154 between the subject A and the subject B and the distance 157 between the subject A and the subject B is referred to as a shift amount.
[0006]
Next, as shown in FIG. 16, when the photograph 150 and the photograph 151 arranged on the left and right shown in FIG. 15 are kept at a constant distance from the eye 160 to the photograph 150 and the photograph 151, and the subject A 161 and the subject B 162 actually exist. By focusing the eye 160 on the conceivable point, the subject A 161 and the subject B 162 taken in the photograph 150 and the photograph 151 can be stereoscopically viewed based on the principle of a stereoscopic image.
[0007]
When the subject A 161 and the subject B 162 are actually viewed from the viewpoint of the eye 160 (the focus of the eye 160 is kept as it is), the subject A 161 is photographed at the intersection of the line of sight of the left eye 160 with the subject A 161 and the photograph 150. Similarly, the photograph 150 in which the subject B162 is photographed at the intersection of the line of sight of the left eye 160 with the subject B162 and the photograph 150, and the intersection of the photograph 151 with the line of sight from the right eye 160 to the subject A161 and the subject B162, respectively. A photograph 151 in which A161 and the subject B162 are taken is inserted in the middle of the line of sight of the left eye 160 toward the subject A161 and the subject B162, and when the right eye 160 is inserted in the middle of the line of sight to the subject A161 and the subject B162, respectively. , The subject A 161 and the subject A 161 in the photograph 150 and the photograph 151. It is possible to recognize the object B162 as a stereoscopic image (actually the image in a state of viewing the object A161 and subject B162). This is based on the principle of a stereoscopic image recognized as a stereoscopic image by the difference (shift amount) between the distance 154 between the subject A and the subject B projected in the left eye 160 and the distance 157 between the subject A and the subject B projected in the right eye 160. by.
[0008]
The above-mentioned problem of the stereoscopic map by the conventional stereo photography method is that when a map is used, two maps must be paired and stereoscopically viewed with both eyes, so that the map is within the pupil width of both eyes. In a large map, it is necessary to devise such means as making a reduced copy, and the plan size is limited, which is impractical.
[0009]
The present invention is intended to solve such a conventional problem, and an object of the present invention is to release the restriction of a range of a visual field from a stereoscopic map by a stereo photograph method.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, a first storage means for storing first map information, and the first map information is shifted in accordance with a feature elevation, and the first map information is shifted between the first map information and the first map information. Second storage means for storing second map information in which parallax is generated, first display control means for displaying one of the first and second map information on a display screen, and Designation means for designating an arbitrary place on the one of the map information displayed on the display screen by the first display control means, and a place designated by the designation means on the display screen. A second display control means for displaying, in parallel with the corresponding partial area on the one piece of map information, a partial area on the other piece of map information corresponding to the partial area, Enables stereoscopic vision based on parallax between partial areas It is stereoscopic map display apparatus characterized.
[0011]
The invention according to claim 2, wherein the second map information is map information obtained by shifting the first map information in accordance with a difference from the minimum altitude. Device.
The invention according to claim 3 is the stereoscopic map display device according to claim 1 or 2, wherein the first map information and the second map information are displayed with contour lines according to elevation. It is.
[0012]
The invention according to claim 4 is characterized in that the first map information and the second map information are step maps which are classified according to the difference from the minimum altitude. It is a stereoscopic map display device of the description.
According to a fifth aspect of the present invention, the step of storing the first map information in the first storage means, and the step generates a parallax between the first map information and the first map information stored in the first storage means. A step of shifting the first map information according to the feature elevation to create second map information and storing the second map information in a second storage means; and a step of storing the second map information in the second storage means. Displaying the first map information on a display screen; and, when an arbitrary place on the first map information displayed on the display screen is designated by a designation unit, the first map information corresponding to the designated place is designated. Causing a computer to execute a step of displaying a partial area on the second map information corresponding to the partial area next to the partial area on the map information. Enables stereoscopic vision based on parallax between regions A stereoscopic map display method characterized by.
[0013]
The invention according to claim 6 is the stereoscopic map display according to claim 5, wherein the second map information is map information obtained by shifting the first map information according to a difference from the minimum altitude. Is the way.
7. The stereoscopic map display method according to claim 5, wherein the first map information and the second map information display contour lines according to elevation. It is.
[0014]
The invention according to claim 8 is characterized in that the first map information and the second map information are step maps which are classified according to the difference from the minimum altitude. It is a stereoscopic map display method described.
According to the first aspect of the present invention, an arbitrary location on the map displayed on the display screen by the first display control means is set to a location designated by the designation means and a partial map is displayed by the second display control means. Is displayed, and the map displayed by the first display control means and the map displayed by the second display control means have an effect of enabling stereoscopic viewing at an arbitrary place on the map. Further, according to the inventions of claims 2 to 4, the same operation and effect as those of the invention of claim 1 can be obtained.
[0015]
According to the fifth aspect of the present invention, the step of displaying the first map information on the display screen and the step of displaying an arbitrary place on the first map information displayed on the display screen by the specifying unit are performed. The step of displaying the second map information corresponding to the designated place sideways in parallel has the effect of enabling stereoscopic viewing at any place on the map. Further, according to the inventions of claims 6 to 8, the same effects and effects as those of the invention of claim 5 can be obtained.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 14 is a configuration of a computer that realizes the map display device according to the embodiment of the present invention. In accordance with the program instructions stored in the memory 141, the CPU 140 creates map data of the base map, the base map A, and the base map B. The created map data is temporarily stored in the external storage device 144 (first storage means and second storage means). When the creation of the map data is completed, the base map A is displayed on the display as the output device 143 (first display control means), and the apparatus waits for an instruction (designation means) from the mouse or the like as the input device 142. When an instruction is received from a mouse or the like, an interrupt instruction is issued to the CPU 140, and a partial area of the base drawing B corresponding to the instructed location is displayed on a display as the output device 143 (second display control means).
[0017]
A process of adding a step data to the base data by referring to a step table for a color corresponding to a specific altitude stored on the memory 141 at the time of creation. Map data for creating a base map based on elevation data. Certain numerical map data and altitude data required for the graduation processing and the shift correction processing are stored in the portable storage medium 146. In addition, the specific height required for the step coloring process and the color table corresponding to the specific height (FIG. 5) and the shift amount (FIG. 10) corresponding to the specific height required for the shift correction process are as follows. Are stored in the memory 141, and are referred to by the CPU 140 when the base map is subjected to the gradual processing or the shift correction processing.
[0018]
FIG. 1 is a flowchart showing an outline of an embodiment of the present invention. In the present invention, it is necessary to prepare a pair of stereo maps (the base map A display window 123 and the base map B display window 124 shown in FIG. 13) used when operating on the display. Therefore, in step S100, map information serving as a basis for the pair of stereo maps is created. Hereinafter, this map information is referred to as a base map, and the base map A obtained by performing a step coloring process for adding color information corresponding to the height based on the height information of the terrestrial features to the base map is referred to as base map A. Further, the base map B is calculated by calculating the shift amount based on the height information of the feature and reflecting the shift amount on the map data of the base map A, and is referred to as a base map B. . In the embodiment of the present invention, “Tokyo-5” of the CD version spatial data base / numerical map 2500 issued by the Geographical Survey Institute is used as the original data of the base map. The CD version of the spatial data infrastructure and numerical map 2500 has a unit area of 2 km x 1.5 km, and "Tokyo-5" includes Toshima-ku, Bunkyo-ku, Shinjuku-ku, Chiyoda-ku, Shibuya-ku and Chuo-ku in Tokyo. The vector map data relating to the ward and Minato ward is stored in 56 small sections. The spatial data base / numerical map 2500 reads the vector map data into the memory 141 via the medium driving device 145 as the portable storage medium 146, the external storage device 144, or the network (step S101), and the CPU 140 described above. The data divided and recorded into 56 sub-segments consisting of vector map data is combined into one plane, converted into a bit map data format to create base map data, and stored in the external storage device 144 (step S100). FIG. 2 shows the map data created in step S100.
[0019]
The altitude data is read from the portable storage medium 146 or the like to the memory 141 (step S103), and the base map data created in step S100 includes step information according to the specific altitude (difference from the minimum altitude in the map data to be used). It is added and stored in the external storage device 144 (step S102). In the step coloring process, the present invention uses specific altitude instead of altitude as height information. This is because when creating a floor map for an area such as Nagano city having a minimum altitude of several hundred meters, for example, it is not necessary to perform a step coloring process at a minimum altitude or lower. The map data created in step S102 is defined as a base map A. Further, in the embodiment of the present invention, as the altitude data issued by the Geospatial Information Authority of Japan, the CD version digital map 50 m mesh altitude data is used. This is composed of 200 × 200 elevation data obtained by dividing one top surface of a 25,000th topographic map at intervals of about 50 m in length and width.
[0020]
In step S104, the CPU 140 calculates a shift amount in accordance with the specific height for the map data of the base map A created in step S102, executes shift correction processing, and stores the result in the external storage device 144 or the like. I do. The map data created in step S104 is defined as a base map B.
[0021]
When the base diagram A and the base diagram B are created in steps S102 and S104, respectively, the base diagram A is displayed on the display as the output device 143 (step S105), and is input by the mouse 125 or the like as the input device 142. An instruction waiting state is set (step S106). On the display, the entire base map A may be displayed on one screen, or only a part of the base map A may be displayed, and the user may drag the mouse with the mouse 125 or the like to shift the map to a position desired by the user. May be.
[0022]
When a point of a map on the screen on which the stereoscopic map is to be displayed is designated by clicking with the mouse 125 or the like as the input device 142, the CPU 140 partially converts the base map B to a portion corresponding to the coordinates of the designated screen. A display process for displaying is performed (step S108 and the base diagram B display window 124 shown in FIG. 12). At this time, the size of the window frame of the base map B display window 124 is the same as that of the base map B display window 124 on the left side of the screen pointed by the mouse 125 in consideration of the visibility of the stereoscopic map. A window frame of the size is displayed. Also, a window frame is displayed for the displayed basic diagram B display window 124 for the same reason. The user of the stereoscopic map can use the periphery of the pointed map as a stereoscopic map by viewing the base map A display window 123 and the base map B display window 124 with both eyes.
[0023]
FIG. 4 is a flowchart showing details of the step coloring process in step S102 of FIG. In step 40, the altitude corresponding to each coordinate of the map data of the base map created in step S100 is obtained from the altitude data read in step S103. The base map map data and the CD version digital map 50 m mesh elevation data read in step S103 are stored in the memory 141, and the CPU 140 performs a process of comparing the elevations corresponding to the coordinates of all the base map map data, Calculate altitude.
[0024]
In step S41, one piece of coordinate data is selected from the map data of the base map created in step S100, and a specific height is calculated by taking a difference from the minimum elevation calculated in step S40 (step S42). When the specific height is calculated in step S42, in step S43, the step height data is stored in the memory 141 in advance based on the step height table corresponding to the specific height and the color shown in FIG. Is added to the map data (step S44).
[0025]
Here, in the present embodiment, each of the coordinates (x, y) corresponding to the 50 m interval in the target area is colored in a circle having a radius r proportional to the specific height. Note that the unit of the coordinates (x, y) in the step coloring and displacement calculation is a pixel (pic). In the case of the embodiment, 1 pic = 0.29 mm. In the embodiment, since the base map is created on the CD version spatial data base / digital map 2500 at a scale of 1/20000, the small section (2 km × 1.5 km) of the CD version spatial data base / digital map 2500 is displayed. Above, it is drawn in a size of 100 mm × 75 mm, and is 345 pic × 259 pic in pixel units. From the above, when displaying the base map A in which the base map is subjected to the step coloring process on the display, assuming that the specific height is h, FIG. 5 shows the coordinates (x, y) corresponding to the target area at 50 m intervals. From the correspondence table, a color corresponding to the specific height is displayed by being filled with a circle having a radius of r = h / 10 (pic). FIG. 3 shows a case where only the yellow data is displayed on the display according to the table of FIG. 5 according to the specific height from the map data of the base map shown in FIG. FIG. 6 shows a tiered diagram obtained by performing a tiered process on the base diagram (FIG. 2).
[0026]
When the step processing is completed, it is determined whether the step processing has been performed for all the coordinates of the base map data (step S45). The process returns to S41 and performs the stage coloring process. If the coloring process has been performed on all the map data, the coloring process ends (step S46), and the process shifts to the displacement correction process (step S104).
[0027]
FIG. 7 is a flowchart showing details of the shift correction processing in step S104 of FIG. The CPU 140 selects specific coordinates from the map data of the base map A created in step S102 developed in the memory 141 (step S70), and calculates a specific height corresponding to the selected coordinates (step S71). As shown in FIG. 10, the deviation amount corresponding to the specific height, which is calculated in advance, tabulated, and stored in the memory 141 is reflected on the coordinates selected in step S70 (the deviation amount is shifted by the deviation amount). Let it do). The shift amount shown in FIG. 10 is the shift amount of the base map B with respect to the base map A when the base map B is displayed on the right side of the base map A display window 123 as the base map B display window 124 as shown in FIG. In the case of a positive value, it is shifted in the minus direction of the x-axis when considering the coordinates with the origin at the lower left corner of the display screen. The coordinate data reflecting the shift amount is sequentially stored in the external storage device 144 as map data of the base map B.
[0028]
When the shift correction processing is completed, it is determined whether the shift correction processing has been performed for all the coordinates of the map data (step S74). Then, the process returns to step S70 to execute the shift correction process. When the shift correction processing is completed for all the map data, the shift correction processing ends (step S75), and the processing shifts to processing for displaying the map data of the base map A on the display as the output device 143 (step S105).
[0029]
Here, the outline of the calculation of the shift correction amount corresponding to the specific height shown in FIG. 10 used in step S72 will be described with reference to FIGS.
As shown in FIG. 8, when observing the relative positions of the two points A and B from the observation points O1 and O2 (in the case of photogrammetry), on a plane at a fixed distance c from the observation points O1 and O2. If a photograph is placed and the directional angles from observation points O1 and O2 to point A are α1 and α2, respectively, and h1 and h2 are the principal points of the photograph,
tanα1 = a1h1 / c
tan α2 = a2h2 / c
Holds.
Also, if the actual distance between the two observation points O1 and O2 is b,
b / h = (h1a1 + h2a2) / c
b / (h + Δh) = (h1b1 + h2b2) / c
It becomes. Here, for the sake of simplicity, let us consider a case where a1 and b1 match.
a2b2 ≒ b / h · c / h · Δh
It becomes.
Therefore, in the case of photogrammetry, an object having a real elevation difference (specific height) between a pair of photographs (or eyes) is ap = b1 at the observation point O1 and dp is the parallax difference at the observation point O2. = A2-b2. At this time, if the specific height of A and B is Δh and the scale factor is m,
Δh = h / b · m · dp
There is a relationship.
[0030]
In the embodiment of the present invention, as shown in FIG. 9, the interpupillary distance (b in FIG. 8) is bm = 200 pic (58 mm), the standard visual distance of the map (h in FIG. 8) is hm = 400 mm, and the PC monitor Assuming that the scale coefficient of the map on the (display) is m = 20,000 and the shift amount of the base map B with respect to the base map A is dp (mm), the recognized specific height Δh is:
Δh = (hm / bm) · m · dp
And the relationship between the deviation dp of the base maps A and B and the actual specific height, the deviation when the specific height of the feature is less than 80 m is
sd = s2 / 4-s3
In addition, when the specific height of the feature is 80 m or more, the shift amount is:
sd = 18 + s2 / 40-s3
Is given. Here, sd is the amount of shift in the horizontal direction of the display (unit is pic), and s2 is the specific height of the feature (unit is m). S3 is a constant shift amount (10 pic). FIG. 11 shows a case where the map data of the base map B described above is displayed on a display which is the output device 143.
[0031]
FIG. 12 is a conceptual diagram in a case where the base diagrams A and B are displayed on a display which is the output device 143. FIG. 13 shows a display example in a case where the base diagrams A and B are actually displayed on the display. The base diagrams A and B are displayed on the display so as to be vertically overlapped. Immediately before the base diagram A is displayed on the display in step S105 of FIG. 1, the base diagram B is displayed on the display window width setting 130 in order to display the base diagram B display window 124 in combination with the base diagram A display window 123. A process of translating the x coordinate by the set value in the direction in which the base diagram B display window 124 is displayed is performed, stored in the memory 141, and displayed on the display. Thereafter, the base diagram A is displayed on the display. In this process, the basic diagram B may be stored in the memory 141 and may not be displayed on the screen. When an instruction is given by the mouse 125 described later, the The process of displaying the portion shown in FIG. Further, after receiving an instruction from the mouse 125, a process of translating the x coordinate by the value set in the display window width setting 130 in the direction in which the base B display window 124 is displayed, for the corresponding base B portion. May be displayed on the display.
[0032]
When there is no external input by clicking the mouse 125 or the like as the input device 142 in the initial state of the screen or the like, only the base diagram A121 is displayed (S106). Here, the widths of the display windows of the base diagram A display window 123 and the base diagram B display window 124 are set by the user using the display window width setting unit 130 illustrated in FIG. In this embodiment, 200 pic is set as an initial value. In the embodiment, the size of the display window is determined such that the display width and the display height are 1: 2. Therefore, when the initial value of the horizontal width of the display window is 200 pic, the initial value of the vertical width of the display window is 400 pic. However, the ratio between the horizontal width and the vertical width of the display window is not limited to 1: 2. When the user clicks and designates an arbitrary point of the base map A to be viewed as a stereoscopic map with the mouse 125 or the like, the display on the display is refreshed, and after the base map B is displayed, the base map A is displayed. A display process is performed on a portion other than the display window 124 in FIG. Alternatively, after the display on the display is refreshed and the base drawing A is displayed on the display, the base drawing B of the corresponding portion designated by the mouse 125 or the like may be displayed. As a result, a part of the base map B corresponding to the specified base map A is displayed in the base map B display window 124, the window of the base map A is opened, and the window of the base map A is displayed (the base map B display window 124). To view the base diagram B. A window frame is displayed on the base diagram B display window 124, and a window frame having the same size as the window frame is also displayed on the display window of the base diagram A. Further, by dragging the mouse 125, the entire displayed map (the base map A121, the base map A display window 122, and the base map B display window 123) may be moved to a position that is easy for the user to see, such as the center of the display. Then, the user may drag the mouse 125 from the position on the base A121 to be viewed in a stereoscopic view to a position easily viewable by the user, and then display the base B display window 122. By viewing the base view A display window 123 and the base view B display window 124 with both eyes, the user can see a stereoscopic map of an arbitrarily designated place on the base view.
[0033]
Further, when it is desired to use a three-dimensional map for a different point on the base map A, the user clicks a desired place with the mouse 125 or the like to display the base map A display window 123 and the base map B in the same manner as described above. A window 124 is displayed. Therefore, the user does not need to prepare a pair of paper maps for each desired map as in the related art, but simply indicates the point to be viewed on the map displayed on the display with the mouse 125 or the like. Then, the stereoscopic map is displayed on the screen, and the stereoscopic map can be easily used. FIG. 13 is a diagram when the map shown in FIG. 12 of the embodiment of the present invention is actually displayed on a display.
[0034]
In the above description, in the embodiment of the present invention, vector map data is used as the original data of the base map like the CD-version spatial data base / digital map 2500 issued by the Geospatial Information Authority of Japan. Instead, raster numerical map data may be used, or data obtained by converting a conventional paper map into an electronic numerical value by means of a scanner or the like may be used. In addition, although the gradual map subjected to the gradual processing according to the specific altitude (altitude) is used for the base map A, the gradual processing is not necessarily required in the present invention. In order to enhance a three-dimensional visual effect, an absolute value display such as a contour line may be displayed. Needless to say, the present invention can realize a stereoscopic map that can be sufficiently stereoscopically viewed even when step processing and contour lines are not used. Furthermore, the arrangement order of the base diagram A display window 123 and the base diagram B display window 124 is not limited to the order shown in FIG. The base diagram B display window 124 may be displayed on the left side of the base diagram A display window 123. In this case, according to the table shown in FIG. 10, when the shift amount in the table is a positive value, the coordinate having the origin at the lower left corner of the display screen is obtained by performing the shift correction processing of the base map B with respect to the base map A according to the table shown in FIG. Can be easily realized by deviating in the x-axis plus direction with respect to.
[0035]
In FIG. 12, the base diagram A121 is displayed on the entire screen, and when the mouse 125 or the like is instructed, the base diagram B display window 124 is displayed. However, the base diagram B122 is displayed on the entire screen. The display window 123 of the base diagram A may be displayed when there is an instruction from the mouse 125 or the like.
[0036]
Further, the output device 143 and the input device 142 to be displayed on the display do not need to be configured as a single device as shown in FIG. 14, and the output device 143 and the input device 142 are connected via an electric communication network such as a network 148. It may be an output device and an input device.
[0037]
【The invention's effect】
As described above, in the electronic stereoscopic map according to the stereo photography method of the present invention, by specifying an arbitrary place to be displayed on the display, a pair of maps required for the stereo photography method are displayed on the display. Therefore, it is possible to use a stereoscopic map by a stereo photography method at an arbitrary location displayed on the display. In addition, by releasing the limitation of the range of the visual field in the conventional stereoscopic map made of paper, it is easy to display a large map (a wide range map) on the display and specify a desired place to view. It is possible to provide a stereo map based on a stereo photography method, which can be viewed as a stereo map in the first place.
[Brief description of the drawings]
FIG. 1 is a flowchart of an embodiment of the present invention.
FIG. 2 is a base diagram created in an embodiment of the present invention.
FIG. 3 is a step diagram of a specific altitude created in the embodiment of the present invention.
FIG. 4 is a flowchart for creating a step diagram according to the embodiment of the present invention.
FIG. 5 is a diagram showing a table of coloring with respect to a specific height.
FIG. 6 is a diagram showing a base diagram A created in the embodiment of the present invention.
FIG. 7 is a flowchart for creating a shift map according to the embodiment of the present invention.
FIG. 8 is a diagram showing an outline of a stereoscopic photograph.
FIG. 9 is a diagram used for calculating a shift amount.
FIG. 10 is a diagram showing a table of a shift amount with respect to a specific height.
FIG. 11 is a diagram showing a base diagram B obtained by shifting FIG. 6;
FIG. 12 is a diagram showing an embodiment of the present invention.
FIG. 13 is a diagram showing the screen of FIG. 11;
FIG. 14 is a circuit diagram used in an embodiment of the present invention.
FIG. 15 is a diagram of a stereo photograph.
FIG. 16 is a top view when a stereo photograph is used.
[Explanation of symbols]
120 ・ ・ ・ Display
121 ... Base A
122: Basic diagram B
123 ・ ・ ・ Basic diagram A display window
124 ・ ・ ・ Basic diagram B display window
125 ... mouse
140 ... CPU
141 ... memory
142 ・ ・ ・ Input device
143 ... Output device
144 external storage device
145... Medium drive device
146 ··· Portable storage device
147 ... Network connection device
148 ... Network
149 ・ ・ ・ Bus

Claims (8)

First storage means for storing first map information;
A second storage unit that stores second map information in which the first map information is shifted according to the feature elevation, and a parallax is generated between the first map information and the first map information;
First display control means for displaying one of the first and second map information on a display screen;
Designation means for designating an arbitrary location on the one of the map information displayed on the display screen by the first display control means;
On the display screen, next to the partial area on the one map information corresponding to the location specified by the specifying means, a second partial area on the other map information corresponding to the partial area is displayed in parallel. Display control means,
A stereoscopic map display device which enables stereoscopic vision based on the parallax between the two partial regions displayed in parallel. The stereoscopic map display device according to claim 1, wherein the second map information is map information obtained by shifting the first map information according to a difference from a minimum altitude. The stereoscopic map display device according to claim 1, wherein the first map information and the second map information are displayed with contour lines according to altitude. 3. The stereoscopic map display device according to claim 1, wherein the first map information and the second map information are step maps that are classified according to a difference from a minimum altitude. Storing the first map information in a first storage means;
The first map information is shifted according to the feature elevation so that the second map information is shifted so that a parallax is generated between the first map information and the first map information stored in the first storage means by the step. Creating and storing in a second storage means;
Displaying the first map information stored in the first storage means on a display screen;
When an arbitrary place on the first map information displayed on the display screen is designated by the designating means, the part is displayed next to the partial area on the first map information corresponding to the designated place. Displaying a partial area on the second map information corresponding to the area in parallel;
A stereoscopic view based on the parallax between the two partial regions displayed side by side by executing a computer. 6. The stereoscopic map display method according to claim 5, wherein the second map information is map information obtained by shifting the first map information according to a difference from a minimum altitude. 7. The stereoscopic map display method according to claim 5, wherein the first map information and the second map information are displayed with contour lines according to elevation. 7. The stereoscopic map display method according to claim 5, wherein the first map information and the second map information are step maps that are classified according to a difference from a minimum altitude.

Images