Patent ID: 7711473
Filing Date: 2010-05-04
Classification: G01C

Abstract:
1. A map data update method of updating nationwide updated version map data to next nationwide updated version map data using nationwide update data and of updating the next nationwide updated version map data using route-specific update data, comprising: a first step of performing map data updating in a background of navigation control in which map data is comprised of a plurality of map files, and giving priority to update processing using the route-specific update data over update processing using the nationwide update data; and a second step of, for map files updated using route-specific update files included in the route-specific update data, performing an update at first using nationwide update files included in the nationwide update data and then performing an update using the route-specific update files, wherein said second step includes sub-steps of: checking whether map files used in the navigation control have been updated using the route-specific update data; if not updated, checking whether the map files have been updated using the nationwide update files included in the nationwide update data; and if not updated, updating the map files using the nationwide update files included in the nationwide update data, and then updating the map files using the route-specific update files, and the updated map files are then used in the navigation control.