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《Geography and Geo-Information Science》 2003-05
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A New QuaPA-based ID-coding Method for Borderless GIS and Global Spatial Data Organization

WU Li-xin1,2,SHI Wen-zhong2(1.Institute of 3S & Subsidence Eng., China Uni. Mining & Tech., Beijing 100083;2.LSGI of PolyU HongKong, China)  
The location coding for spatial entity is the key of spatial data organization, and is the base of geo-information inquiry, index and data excavation. Referring to the shortcomings of traditional ID coding techniques and the urgent demands of borderless GIS and global spatial data organization, the location information of spatial entity is applied in the ID coding process. A new QuaPA-based ID coding method, comprised of principal code and auxiliary code, is presented. It takes the quadrant where the entity involved in, the location of the entity and the unique indexing-label of the entity into consideration as a whole. As mine GIS for application example, the QuaPA coding for the spatial entity in borderless 2D GIS and 3D GIS is introduced, and as global spatial data organization for example, the QuaPA coding based on latitude-longitude coordination system and global radius is introduced. The QuaPA method supports the rapid spatial indexing based on window's coordinate and grid index mechanism.
【Fund】: 教育部"高校青年教师奖"专项基金;; 香港研究资助局(3_ZB40);; 香港理工大学(1.34.9709)
【CateGory Index】: P208
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