Patent ID: 6728633
Filing Date: 2004-04-27
Classification: G01C,Y10S

Abstract:
A map data processing apparatus comprising:storing means for storing map data, the map data including record map data stored in a plurality of tables, and header map data indicating a location of each table by an offset from a reference point; information acquiring means for sending an updating operation request requesting an update in the map data to a map-data-providing station, and for acquiring updating-operation information indicating updating content transmitted from the map-data-providing station in response to the updating-operation request containing map data identification information and a version number for the map data identification information; and updating means for updating the map data stored in said storing means according to the updating-operation information acquired by said information acquiring means, wherein the updating-operation information contains an updating information header that includes data type information for specifying type of the map data to be updated, update position information for specifying whether the map data to be updated is located by a record number or offset information, and update type information indicating type of update to be performed on the map data.