Patent ID: 8612153
Filing Date: 2013-12-17
Classification: G01C

Abstract:
1. A map data management apparatus comprising: a storage for storing map data; a data acquisition unit for acquiring data as first map data that is to be used in the apparatus; and an update unit for performing update of the data in the storage by replacing a second map data in the storage with the first map data acquired by the data acquisition unit, wherein the first map data includes at least a high-priority portion and a low-priority portion, the second map data includes at least a high-priority portion and a low-priority portion, the update unit replaces the low-priority portion of the second map data with the high-priority portion of the first map data as a first replacement, replacement of the low-priority portions of the second map data with the high-priority portion of the first map data being performed by storing the high priority portion of the first map data for the update in the storage, thereby allowing co-existence of the high-priority portion of the first map data and the high-priority portion of the second map data in the storage, and the update unit thereafter replaces the high-priority portion of the second map data with the low-priority portion of the first map data after the first replacement.