THREE-DIMENSIONAL MAP DRAWING SYSTEM

Disclosed is a three-dimensional map wherein scale is preserved. Landscape feature data, wherein roads, buildings, and other landscape features are drawn three-dimensionally, is prepared, and a three-dimensional map is drawn on the basis of the data. The landscape feature data is generated by a method that projects an actual landscape feature (CST2) upon a projection plane (PL2) with parallel lines along the projection direction (PRJ), or in other words, a parallel projection, rather than a perspective projection. The landscape feature data is comprised of either two-dimensional raster data or polygonal data that draws a parallel projected projection map. It is possible to draw the three-dimensional map by only drawing the prepared landscape feature data, without rendering or other load-intensive processing. Unlike the perspective projection, with the parallel projection, the positional relations and scale of shapes between buildings is preserved, thereby facilitating a three-dimensional map wherein scale is preserved.