Patent ID: 8073876
Filing Date: 2011-12-06
Classification: G01C,G08G,G09B

Abstract:
1. A computer readable storage medium having stored therein distribution map data used to distribute a map through communication, the distribution map data comprising: road data in correspondence to each of a plurality of map area blocks, the map area blocks ranging over individual areas of the map which are equal to one another in size, wherein the road data provides position information indicating positions of roads within the map area blocks; and integrated name data that provides common name information for a road, such that the integrated name data provides a single set of name data for the road for use in all of the map area blocks in which the road is present, wherein: the distribution map data includes the road data in each of a plurality of map layers set in correspondence to different specific scaling factors, each of the scaling factors having been set in accordance with ratios of distances between points as represented on the corresponding map layer and the actual distances between the points; and the integrated name data provides the common name information such that the integrated name data provides the single set of name data in the plurality of the map layers.