Patent ID: 8457886
Filing Date: 2013-06-04
Classification: G01C,G06F,G09B

Abstract:
1. A method implemented on a navigation system that includes a data receiving device and a memory device, map data of a map being stored in the memory device, wherein the map data (i) are hierarchically organized into at least two hierarchy levels, the levels including a low hierarchy level and a high hierarchy level higher than the low hierarchy level, and (ii) includes a plurality of page frames assigned to (a) the low hierarchy level and (b) a page frame that is assigned to the high hierarchy level, the method comprising: receiving, via the receiving device, updated map data that is assigned an update version identification; responsive to the receipt of the updated map data: responsive to the updating of the at least one of the plurality of page frames of the low hierarchy level, assigning the update version identification, that is assigned to the each of the at least one of the plurality of page frames of the low hierarchy level that have been updated, to the page frame of the high hierarchy level to which the at least one of the plurality of page frames of the low hierarchy level is assigned.