3 3 THREE-DIMENSIONAL MAP DRAWING LANDSCAPE FEATURE DATA GENERATING METHOD THREE-DIMENSIONAL MAP DRAWING METHOD AND COMPUTER-READABLE RECORDING MEDIUM

摘要

Provides a three-dimensional map that preserves the scale. Roads, buildings, and the like are created in advance, and a three-dimensional map is drawn based on the data. The object data is generated by a method of projecting the actual object CST2 onto the projection plane PL2 with a parallel line along the projection direction PRJ, that is, by parallel projection, instead of perspective projection. The object data is provided as two-dimensional raster data or polygon data for drawing a parallel projection projected image. Dimensional map can be drawn without performing a process with a large load {load} such as rendering only by rendering prepared article data in this manner. In the parallel projection, unlike the perspective projection, since the positional relationship between the buildings and the scale of the shape are preserved and maintained, it is possible to provide a three-dimensional map in which the scale is preserved and maintained.