Navigation system and method for displaying map on navigation system

1. A method for displaying a map performed by a processor of a navigation system including a key input device, a display, a map data storage, and a GPS module, the method comprising:

loading a numerical map from the map data storage, the numerical map including a current position detected through the GPS module or a specific position selected through the key input device;

defining a first area of the numerical map;

matching a scale of a photomap stored in the map data storage with a scale of the numerical map;

extracting a region of the photomap, the region including a second area corresponding to the first area;

matching a reference point of the region of the photomap and a reference point of the first area of the numerical map to overlap the region of the photomap on the numerical map;

generating a matched map by performing a boundary treatment at an area of the region of the photomap outside the first area;

displaying the matched map by the display; and

wherein the boundary treatment includes an Alpha Blending process in which an alpha value for the Alpha Blending process decreases as a distance from a border of the first area increases.

2. The method of claim 1 , wherein the first area is set in a rectangular block unit.

3. The method of claim 1 , wherein the first area is set in a polygon unit.

4. The method of claim 1 , wherein the region of the photomap is larger than the second area.

5. The method of claim 1 , wherein the photomap includes an aerial photomap or a satellite photomap.

6. The method of claim 1 , wherein the first area is set in a polygon unit,

wherein the region of the photomap is larger than the second area,

wherein the photomap includes an aerial photomap or a satellite photomap, and

wherein the first area, when the first area is one of a park, a golf course, a contour line, a green belt, and a water system, is set by selecting a point in the first area or inputting a specific condition for the first area.

7. A navigation system, comprising:

a GPS module configured to detect a current position;

a key input device configured to receive an input for selecting a specific position;

a map data storage configured to store a numerical map and a photomap;

a processor configured to load the numerical map including the current position or the specific position, to define a first area of the numerical map, to match a scale of the photomap with a scale of the numerical map, to extract a region of the photomap including a second area corresponding to the first area, to match a reference point of the region of the photomap and a reference point of the first area of the numerical map to overlap the region of the photomap on the numerical map, and to generate a matched map by performing a boundary treatment with respect to an area of the region of the photomap outside the first area; and

a display configured to display the matched map; and

wherein the boundary treatment includes an Alpha Blending process in which an alpha value for the Alpha Blending process decreases as a distance from a border of the first area increases.

8. The navigation system of claim 7 , wherein the first area is set in a rectangular block unit.

9. The navigation system of claim 7 , wherein the first area is set in a polygon unit.

10. The navigation system of claim 7 , wherein the region of the photomap is larger than the second area.

11. The navigation system of claim 7 , wherein the photomap includes an aerial photomap or a satellite photomap.

12. The system of claim 7 , wherein the first area is set in a polygon unit,

wherein the region of the photomap is larger than the second area,

wherein the photomap includes an aerial photomap or a satellite photomap, and

wherein the first area, when the first area is one of a park, a golf course, a contour line, a green belt, and a water system, is set by selecting a point in the first area or inputting a specific condition for the first area.

13. A method for displaying a map by a processor on a navigation system including a key input device, a display, a map data storage, and a GPS module, the method comprising:

loading a photomap from the map data storage, the photomap including a current position detected through the GPS module or a specific position selected through the key input device;

defining a first area of the photomap matching a scale of a numerical map stored in the map data storage with a scale of the photomap;

extracting a region of the numerical map, the region including a second area corresponding to the first area;

matching a reference point of the region of the numerical map and a reference point of the first area of the photomap to overlap the region of the numerical map on the photomap;

generating a matched map by performing a boundary treatment at an area of the region of the numerical map outside the first area; and

displaying the matched map by the display; and

wherein the boundary treatment includes an Alpha Blending process in which an alpha value for the Alpha Blending process decreases as a distance from a border of the first area increases.

14. The method of claim 13 , wherein the first area is set in a polygon unit,

wherein the region of the numerical map is larger than the second area,

wherein the photomap includes an aerial photomap or a satellite photomap, and

wherein the first area, when the first area is one of a park, a golf course, a contour line, a green belt, and a water system, is set by selecting a point in the first area or inputting a specific condition for the first area.