Patent ID: 6621494
Filing Date: 2003-09-16
Classification: G01C,G08G,G09B

Abstract:
A map database device for displaying a bird's eye view map by converting a two-dimensional map into a display format of a bird's eye view method, comprising:an element point data portion in which positional coordinates of each element point existing in said two-dimensional map are stored, the two-dimensional map being divided into a plurality of areas; and a height data portion in which a plurality of height data respectively corresponding to altitudes of the plurality of areas into which said two-dimensional map is divided are respectively stored, each of the plurality of areas being assigned only one of the plurality of height data, wherein one of the plurality of height data corresponding to one of the plurality of areas is common for all element points existing in the one of the plurality of areas; and the plurality of height data are used for displaying the bird's eye view map.