Apparatus and method for providing map data and system thereof

A navigation providing method of a navigation terminal which provides a navigation function and includes a reception unit and an execution unit, the navigation providing method comprising:

• receiving, by the reception unit, a file in which map data of a specific zone is stored, from a map provision server;
• and
• executing, by the execution unit, a navigation function on the specific zone with the file,
• wherein the file is produced by an individual unit with respect to each of geographic areas divided by a mesh unit having a variable size, and
• wherein the size of the mesh unit is decided according to amount of information included in the geographic area such that the file has an equalized size;
• wherein the s specific zone is selected by a user:
• wherein the reception unit is further adapted to receive files of areas corresponding to the specific zone selected by the user, from the divided geographic areas in a lump;
• and
• wherein the files of the areas corresponding to the specific zone selected by the user are stored in an internal memory, and files of additional areas corresponding to zones other than the specific zone selected by the user are temporarily stored in a cache;
• the execution unit executing the navigation function for areas corresponding to the specific zone selected by the user on the files stored in the internal memory, when reception unit does not communicate with the map provision server;
• the execution unit executing the navigation function for the additional areas not selected by the user with the files temporarily stored in the cache when reception unit communicates with the map provision server;
• and the execution unit performing routes search, displaying the routes on a display device, and proving the route guidance.

A non-transitory computer-readable medium which includes an instruction enabling a computer system to provide a navigation function, the computer system being controlled by a method comprising receiving a file in which map data of a specific zone is stored, from a map provision server;

• and executing a navigation function on the specific zone with the file,
• wherein the file is produced by an individual unit with respect to each of geographic areas divided by a mesh unit having a variable size,
• wherein the size of the mesh unit is decided according to amount of information included in the geographic area such that the file has an equalized size, and
• wherein information needed for a map screen display, a route search, and a route guidance is stored in the file;
• wherein the specific zone is selected by a user;
• wherein the computer system is further adapted to receive files of areas corresponding to the specific zones selected by the user, from the divided geographic areas in a lump;
• and
• wherein the files of the areas corresponding to the specific zone selected by the user are stored in an internal memory, and files of addition areas corresponding to zones other than the specific zone selected by the user are temporarily stored in a cache;
• the computer system executing the navigation function for areas corresponding to the specific zone selected by the user on the files stored in the internal memory, when a reception unit does not communicate with the map provision server;
• the computer system executing the navigation function for the additional areas not selected by the user with the files temporarily stored in the cache, when the reception unit communicates with the map provision server;
• and the computer system performing routes search, displaying the routes on a display device, and proving the route guidance.