MAP DISPLAY SYSTEM, MAP DISPLAY METHOD FOR MAP DISPLAY SYSTEM, MAP DISPLAY DEVICE, AND PROGRAM

摘要

When a bird's-eye view map showing roads, the roads are emphatically displayed. A map display system comprises a database storing map data and display means for displaying an image of a planar map or a bird's-eye view according to the map data acquired from the database storing map image. The map display system further comprises image data creating means for creating image data on a planar map or image data on a bird's-eye view map created by projection transformation of a planar map with a predetermined display width coefficient, drawing means for drawing a map on basis of the image data on the planar map or the bird's-eye view map, and display width coefficient control means. When the image data on the bird's-eye view map is created, the display width coefficient control means controls image data creating means so that the roads shown on the planar map undergo projection transformation with a display width coefficient larger than the predetermined display width coefficient, and the display means displays the map of the image data drawn by the drawing means.