MAP IMAGE DISPLAY SYSTEM, MAP IMAGE DISPLAY DEVICE, MAP IMAGE DISPLAY METHOD, AND COMPUTER PROGRAM
First Claim
1. A map image display system comprising:
- a controller configured to;
acquire map data that is divided into a plurality of areas and hierarchically structured into a plurality of layers based on an amount of road network information;
define a display target area on a display device based on the acquired map data;
divide the display target area into a plurality of division areas with parts of neighboring ones of the division areas overlapping each other;
generate a map image for each of the division areas, each map image being based on a different layer of the map data;
in an area where two or more of the generated map images overlap, gradually change a transmittance of a first one of the overlapped map images so that a transmittance of an outer portion of the first overlapped map image becomes higher than a transmittance of an inner portion of the first overlapped map image;
display a second one of the overlapped map images on the display device; and
after the second map image is displayed on the display device, display the first map image on the display device so that the first map image is overlapped on the displayed second map image.
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Accused Products
Abstract
Map image display systems, devices, methods, and programs divide a display target area into a plurality of division areas with parts of neighboring ones of the division areas overlapping each other, and generate a map image for each of the division areas, each map image being based on a different layer of stored map data. In an area where two or more of the generated map images overlap, a transmittance of a first one of the overlapped map images is gradually changed so that a transmittance of an outer portion becomes higher than a transmittance of an inner portion. The systems, devices, methods, and programs display a second one of the overlapped map images on the display device, and then display the first map image on the display device so that the first map image is overlapped on the displayed second map image.
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Citations
16 Claims
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1. A map image display system comprising:
a controller configured to; acquire map data that is divided into a plurality of areas and hierarchically structured into a plurality of layers based on an amount of road network information; define a display target area on a display device based on the acquired map data; divide the display target area into a plurality of division areas with parts of neighboring ones of the division areas overlapping each other; generate a map image for each of the division areas, each map image being based on a different layer of the map data; in an area where two or more of the generated map images overlap, gradually change a transmittance of a first one of the overlapped map images so that a transmittance of an outer portion of the first overlapped map image becomes higher than a transmittance of an inner portion of the first overlapped map image; display a second one of the overlapped map images on the display device; and after the second map image is displayed on the display device, display the first map image on the display device so that the first map image is overlapped on the displayed second map image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A map image display method comprising:
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acquiring map data that is divided into a plurality of areas and hierarchically structured into a plurality of layers based on an amount of road network information; defining a display target area on a display device based on the acquired map data; dividing the display target area into a plurality of division areas with parts of neighboring ones of the division areas overlapping each other; generating a map image for each of the division areas, each map image being based on a different layer of the map data; in an area where two or more of the generated map images overlap, gradually changing a transmittance of a first one of the overlapped map images so that a transmittance of an outer portion of the first overlapped map image becomes higher than a transmittance of an inner portion of the first overlapped map image; displaying a second one of the overlapped map images on the display device; and after the second map image is displayed on the display device, displaying the first map image on the display device so that the first map image is overlapped on the displayed second map image. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer-readable storage medium storing a computer-executable image display program, the program comprising:
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instructions for acquiring map data that is divided into a plurality of areas and hierarchically structured into a plurality of layers based on an amount of road network information; instructions for defining a display target area on a display device based on the acquired map data; instructions for dividing the display target area into a plurality of division areas with parts of neighboring ones of the division areas overlapping each other; instructions for generating a map image for each of the division areas, each map image being based on a different layer of the map data; instructions for, in an area where two or more of the generated map images overlap, gradually changing a transmittance of a first one of the overlapped map images so that a transmittance of an outer portion of the first overlapped map image becomes higher than a transmittance of an inner portion of the first overlapped map image; and instructions for displaying a second one of the overlapped map images on the display device; instructions for, after the second map image is displayed on the display device, displaying the first map image on the display device so that the first map image is overlapped on the displayed second map image. - View Dependent Claims (16)
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Specification