Map display device and map display method

1. A map display device that displays a plurality of drawing pictures including a first drawing picture and a second drawing picture in an at least partially overlapping manner,

said first drawing picture displaying at least one first drawing object and having a preset first attention point,

said second drawing picture displaying at least one second drawing object and having a preset second attention point,

wherein the attention points are points to be compared when the user refers to both the first drawing picture and the second drawing picture,

one of said first and second drawing objects displaying a map displaying a geographical area as map information and the other one displaying map relevant information, and

the map display device comprising:

an input unit that receives input of user operation related to display of a drawing picture; and

a controller that controls an overlapping state between said first drawing picture and said second drawing picture in accordance with input of user operation received by said input unit and outputs, to a display unit, a picture in which one of said first and second drawing objects masks the other one in a portion where said first drawing picture and said second drawing picture are overlapped with each other, and

wherein said controller slides one of said first and second drawing pictures relatively to the other one so as to successively change the overlapping state between said first and second drawing pictures with a board slide by which said first drawing picture and its associated drawing object is shifted in a slide direction in association with the sliding of said drawing picture to change the overlap of said first and second drawing pictures on a display without changing the position of the first display object with respect to the first drawing picture

upon control of the overlapping state between said first drawing picture and said second drawing picture, said first attention point and said second attention point always coincide with each other, or said first attention point and said second attention point coincide with each other only when a predetermined overlapping state is established;

wherein as the controller performs the board slide, the first attention point approaches the second attention point.

2. The map display device according to claim 1 , wherein

said input unit and said display unit are integrally formed as a display device provided with a touch panel.

3. The map display according to claim 1 wherein said map display device is equipped on a mobile body, and

one of said first drawing object and said second drawing object displays information related to one of a position on a map of said mobile body, a travel route of said mobile body, and a destination of said mobile body.

4. The map display device according to claim 1 , wherein

said controller successively controls the overlapping state from a completely overlapped state to a completely displaced state between said first and second drawing pictures.

5. The map display device according to claim 4 , wherein

when said second drawing picture is smaller than said first drawing picture,

in said completely overlapped state, entirety of said second drawing picture is overlapped with a predetermined range of said first drawing picture.

6. The map display device according to claim 1 , wherein

said display unit includes a display screen, and

the size of said first drawing picture corresponds to entirety of said display screen and the size of said second drawing picture corresponds to entirety or part of said display screen.

7. The map display device according to claim 1 wherein the map relevant information includes at least one of traffic jam data or line data.

8. The map display device according to claim 1 wherein said first and second drawing pictures are the same size.

9. The map display device of claim 1 wherein one of the first and second attention points is a current position of the user.

10. The map display device of claim 1 wherein one of the first and second attention points is a destination on the respective drawing picture.

11. A method of processing map data for display on a map display to enable display of a plurality of drawing pictures including a first drawing picture and a second drawing picture in an at least partially overlapping manner,

said first drawing picture displaying at least one first drawing object and having a preset first attention point,

said second drawing picture displaying at least one second drawing object and having a preset second attention point,

wherein the attention points are points to be compared when the user refers to both the first drawing picture and the second drawing picture,

one of said first and second drawing objects displaying a map of a geographical area as map information and the other one displaying map relevant information, and

said first and second drawing pictures being equal or different in size,

the method including the steps of:

(a) receiving input of user control operations related to display of a drawing picture,

(b) providing map information and map relevant information for display;

(c) processing said map information and said map relevant information under control of the user control operations to produce display information;

(d) providing the display information to the display to display said map information and said map relevant information as a plurality of drawing pictures, and

said step of processing controlling an overlapping state between said first drawing picture and said second drawing picture in accordance with input of user operations received in said step (a), and masking one of said first and second drawing objects with the other one in a portion where said first drawing picture and said second drawing picture are overlapped with each other, and

in said step (c), one of said first and second drawing pictures is slid relatively to the other one so as to successively change the overlapping state between said first and second drawing pictures by enlarging one of said first and second drawing pictures while reducing the other one of said first and second drawing pictures, the one of said first and second drawing pictures being slid over the other in a board slide by which said drawing object in said drawing picture is shifted in a slide direction in association with the sliding of said drawing picture without changing the position of the first display object with respect to the first drawing picture, and

upon control of the overlapping state between said first drawing picture and said second drawing picture, said first attention point and said second attention point always coincide with each other, or said first attention point and said second attention point coincide with each other only when a predetermined overlapping state is established,

wherein, when the board slide is performed in said step (c), the first attention point approaches the second attention point.

12. The method of claim 11 wherein one of the first and second attention points is a current position of the user.