Patent ID: 6125367
Filing Date: 2000-09-26
Classification: G01C,Y10S

Abstract:
A map data base management method comprising the steps:(a) constructing a map index file including region indices designated for each of a plurality of regions partitioning maps drawn on a plurality of scales for a same geographical area, wherein a region index designating each region of a large-scale map determines region indices designating a plurality of regions of a map of a smaller scale than that of the large-scale map;(b) constructing a map data file wherein among regions designated by region indices in step (a), individual map data is designated by a scale and a region index, and only regions having land in a corresponding scale map have corresponding map data;(c) determining a region index corresponding to a desired longitude and latitude and a desired scale, using the map index file; and(d) reading and displaying map data corresponding to a desired scale and the region index determined in step (c) from the map data file.