Navigation device for vehicle and preparation of road shape data used therefor

摘要

A road shape data preparation device, comprising: location change calculation device that calculate the change of the location in line with the traveling of a traveling status vehicle detected by the traveling status detection device; correction device that compare the location change obtained by the location change calculation device with accurate location data according to the said location change obtained by other device and corrects the traveling status detected by the traveling status detection device based on the comparison result; and road shape data calculation device that calculate the road shape data based on the correct traveling status.