Method for organizing map data
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Abstract
A method of organizing map data on a physical storage medium is disclosed. The map data represents geographic features located in a geographic region. The method identifies at least one dense area in the geographic region. The map data representing the geographic features within the dense area have a data size exceeding a predetermined maximum size for a predetermined sized geographic area of the region. The method subdivides the map data representing the geographic features within the dense area into parcels so that the portion of map data contained in the parcel is close to a predetermined parcel size. The method subdivides the map data less the map data representing the dense area into parcels so that the portion of map data contained in the parcel is close to the predetermined parcel size. Additionally, the method locates the map data in each parcel together on the physical storage medium.
88 Citations
48 Claims
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1-28. -28. (canceled)
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29. A method of organizing data on a physical storage medium, wherein the data represent geographic features located in a geographic region, the method comprising:
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identifying at least one dense area in the geographic region, the data representing the geographic features within said dense area having a data size larger than a predetermined size for a predetermined sized area;
forming at least one small area parcel from the data representing the geographic features within said dense area, and forming at least one large area parcel from the data representing the geographic features located in the geographic region less the data representing the dense area. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of organizing map data on a physical storage medium, the map data represent geographic features located in a region, the method comprising:
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organizing the region into a grid of tiles;
identifying at least one dense tile having an estimated map data size larger than a predetermined size;
forming a plurality of small area parcels from the map data contained within the dense tile; and
forming a plurality of large area parcels from the map data less the map data contained within the dense tiles. - View Dependent Claims (42, 43, 44, 45, 46, 47)
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48. A map database comprising:
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map data that represent geographic features located in a region;
the map data are organized into a plurality of large area parcels and a plurality of small area parcels;
each of the small area parcels formed from dense areas in the region, the data representing the geographic features within said dense area having a data size larger than a predetermined size for a predetermined sized area;
each of the large area parcels formed from the data representing the geographic features located in the region less the data representing the dense area.
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Specification