Landmark search system for digital camera, map data, and method of sorting image data
In a camera location landmark search system, when an image is captured by a digital camera, a GPS calculator calculates position data indicating a camera position. The position data and image data of the captured image are memorized in association with each other. Map data is divided at regular intervals of latitude and longitude into a lot of areas. Based on the position data, a divisional area including the camera position is selected with reference to a divisional area index table of the map data, and landmark data prepared for the determined divisional area are retrieved from a landmark data table of the map data. Based on the landmark data, a landmark corresponding to the camera position is determined, and the landmark name is memorized in association with the image data. The image data as sorted according to the landmark names may be displayed with the landmark names.
1. A landmark search system, comprising:
a digital camera comprising a position data obtaining device for obtaining position data of a camera position at which an image is captured, and a data storage device for storing said position data in association with image data of the captured image;
a map data storage device storing map data, said map data comprising area data of divisional areas which are provided by dividing a map area at regular intervals of a latitude and a longitude, and place data prepared for each of said divisional areas, said place data including data of landmarks located in each of said divisional areas; and
a search device that searches said map data based on said position data, to select one divisional area that includes the camera position, and thereafter retrieve said place data for the selected divisional area, to determine a landmark that corresponds to the camera position.
2. A landmark search system as claimed in claim 1 , wherein said place data comprises landmark name data and landmark area data.
3. A landmark search system as claimed in claim 2 , wherein said landmark area data comprises data of latitudes and longitudes of vertexes of polygonal areas that outline actual areas of respective landmarks.
4. A landmark search system as claimed in claim 3 , wherein said landmark area data further comprises data of an extended area that is extended in all directions by a predetermined width from each of said polygonal areas.
5. A landmark search system as claimed in claim 1 , wherein said place data further comprises data of an inclusive relation between those landmarks, of which one is included in an area of another.
6. A landmark search system as claimed in claim 1 , further comprising a data storage device for storing data of the determined landmark in association with image data of the captured image.
7. A landmark search system as claimed in claim 1 , further comprising a display device for displaying results of a search by said search device.
8. A landmark search system as claimed in claim 1 , wherein said position data obtaining device comprises a GPS (global positioning system) terminal.
9. A search method for retrieving data of a landmark that corresponds to a camera position at which an image is captured by a digital camera, said method comprising:
preparing map data that comprises area data of divisional areas which are provided by dividing a map area at regular intervals of a latitude and a longitude, and place data prepared for each of said divisional areas, as executed by a processing unit on a computer, said place data including data of landmarks located in each of said divisional areas;
obtaining position data of the camera position;
searching said map data based on said position data, to select one divisional area that includes the camera position; and
thereafter retrieving said place data for the selected divisional area, to determine the landmark that corresponds to the camera position.
10. A search method as claimed in claim 9 , wherein said place data comprises landmark name data and landmark area data.
11. A search method as claimed in claim 10 , wherein said landmark area data comprises data of latitudes and longitudes of vertexes of polygonal areas that outline actual areas of respective landmarks.
12. A search method as claimed in claim 11 , wherein said landmark area data further comprises data of an extended area that is extended in all directions by a predetermined width from each of said polygonal areas.
13. A search method as claimed in claim 9 , wherein said place data further comprises data of an inclusive relation between those landmarks, of which one is included in an area of another.
14. A search method as claimed in claim 9 , wherein said position data is obtained through a global positioning system.
15. A device for retrieving data, said device comprising:
a search device that searches map data to retrieve data of a landmark that corresponds to a camera position at which an image is captured, said map data comprising area data of divisional areas which are provided by dividing a map area at regular intervals of a latitude and a longitude, and place data prepared for each of said divisional areas, said place data including data of landmarks located in each of said divisional areas,
wherein said place data further comprises data of an inclusive relation between the landmarks, of which one is included in an area of another.
16. The device of claim 15 , wherein said place data comprises landmark name data and landmark area data.
17. The device of claim 16 , wherein said landmark area data comprises data of latitudes and longitudes of vertexes of polygonal areas that outline actual areas of respective landmarks.
18. The device of claim 17 , wherein said landmark area data further comprises data of an extended area that is extended in all directions by a predetermined width from each of said polygonal areas.
19. The device of claim 15 , wherein the inclusive relation between the landmarks comprises a parent-affiliate relation between the landmarks.
20. The device of claim 15 , wherein the map data further comprises a landmark data table which stores the place data comprising parent data and affiliate data of respective ones of the landmarks.
21. The device of claim 15 , wherein the search device selects one divisional area that includes the camera position, and thereafter retrieves said place data for the selected divisional area, to determine a landmark that corresponds to the camera position.