THREE-DIMENSIONAL MAP DISPLAY NAVIGATION DEVICE, THREE-DIMENSIONAL MAP DISPLAY SYSTEM, AND THREE-DIMENSIONAL MAP DISPLAY PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a three-dimensional map display technology reducing overall computer load on a three-dimensional map display as well as reducing a plotting load. SOLUTION: The three-dimensional map display navigation device includes: a map database having a road database 21 storing road data, and a stereograph database 22 storing stereographic data of a solid body; a route information storage part for storing route information pertaining to a guidance route set based on the road data; a stereographic data reading unit 6 for accessing the map database, computing a discrete distance between the guidance route and the solid body, and transferring stereographic data pertaining to the solid body that has been simplified depending on the discrete distance, to a buffer part; and a map image generating means for generating a three-dimensional map image for route guidance based on the stereographic data taken out of the buffer part. COPYRIGHT: (C)2009,JPO&INPIT