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Spatial indexing method and apparatus for navigation system for indexing and retrieval of XML map data
Spatial indexing method and apparatus for navigation system for indexing and retrieval of XML map data
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机译:用于XML地图数据的索引和检索的导航系统的空间索引方法和装置
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摘要
A method and apparatus efficiently assigns the spatial index numbers to map cells that divide an area which is a unit of administrative region into a plurality of small units. The method includes the steps of: establishing a plurality of map cells that divide an administrative region expressed by XML map data which is configured in a multiple-layered structure; determining a layer in the XML map data on which the map cells are established; selecting a type of tracing curve for sequentially indexing the plurality of map cells; assigning index numbers consecutively to the map cells with the sequence of the tracing curve; and repeating foregoing steps for all of the map cells in all of the layers of the XML map data, thereby creating a map database in the XML format with the spatial indexes for all of the map cells.
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