Patent ID: 8218824

Claim:
A spatial information database generating device, comprising: an optical image acquiring unit that acquires an optical image of an ground surface from a predetermined height; a laser measuring unit that acquires altitude information of an ground surface from a predetermined height by laser measurement; a coordinate acquiring unit that acquires coordinate information of a position where the optical image is acquired and a position where the laser measurement is performed; and a synthesizing unit that synthesizes the optical image and the altitude information acquired by the laser measurement based on similarity between altitude information included in the optical image and the altitude information acquired by the laser measurement and based on the coordinate information, wherein the synthesizing unit creates an orthographic projection image from the optical image, groups altitude information of a digital surface model created from the orthographic projection image for each object, groups the altitude information acquired by the laser measurement for each object, and synthesizes the optical image and the altitude information acquired by the laser measurement based on the position information of each object.