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《Geography and Geo-Information Science》 2009-04
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Preliminary Studies on Geospatial Information Code Model Based on Global Subdivision Model

CHENG Cheng-qi,SONG Shu-hua,WAN Yuan-wei,GUAN Li,ZHANG En-dong(Institute of Remote Sensing and GIS,Peking University,Beijing 100871,China)  
Considering existing data models of GIS applications,identification of the same geospatial object is usually not the same in different application systems,and the object's identification is always static and lack of geospatial information such as position and scale.These hinder the data sharing in GIS.To solve these problems caused by objects' IDs,a new universal code of global geospatial information,GeoDNA,is put forward based on global subdivision model(GSM) and the universal coding architecture is designed.Spatial objects' GeoDNA that combines subdivision cell's address identifier with object feather code is unique in the world,and may express continuous and multi-scale global geospatial information due to the hierarchical and continuous property of GSM.At the last part,an example of encoding objects in a remote sensing image is presented,and the results show that GeoDNA on global geospatial information enhances data sharing capacity in GIS and improves efficiency of global massive data storage and management,which is of theoretical and applied value in regional emergency response.
【Fund】: 国家863计划项目(2008AA701108)
【CateGory Index】: P208
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