BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram showing a map data update system to which an embodiment of the present invention is applied;
FIG. 2 is a diagram for explaining differential updating data;
FIG. 3 is a schematic diagram showing concepts of region and mesh;
FIG. 4 is a schematic diagram showing registered contents of partial update management data TL 1032;
FIG. 5 is a schematic diagram showing registered contents of differential update management data TL 1033;
FIG. 6 is a diagram for explaining depending relationship of differential updating data;
FIG. 7A is a diagram for explaining a structure 1701 of partial updating data file; and
FIG. 7B is a diagram for explaining a structure 1702 of differential updating data file;
FIG. 8 is a diagram showing an example of hardware structure of a map provider 10 and a navigation terminal 20;
FIG. 9 is a schematic diagram showing registered contents of map data TL 2701;
FIG. 10 is a schematic diagram showing registered contents of partial update management data TL 2032;
FIG. 11 is a schematic diagram showing registered contents of differential update management data TL 2033;
FIG. 12 is a diagram for explaining total operations of the map data update system to which an embodiment of the present invention is applied;
FIG. 13 is a diagram for explaining operation flow in the step S101 (update management data generating process) in FIG. 12;
FIG. 14 is a diagram for explaining operation flow in the step S102 (update management data selecting process) in FIG. 12;
FIG. 15 is a diagram for explaining operation flow in the step S103 (update application process) in FIG. 12;
FIG. 16 is a schematic diagram showing a navigation terminal to which an embodiment of the present invention is applied;
FIG. 17 is a diagram for explaining total operations of the map data updating process to which an embodiment of the present invention is applied;
FIG. 18 is a schematic diagram showing registered contents of region boundary mesh ID column TL 1031; and
FIG. 19 is a schematic diagram showing a navigation terminal to which an embodiment of the present invention is applied.