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Centralized Data Model of Multi-scaled GIS

WANG Yan-min1, LI De-ren2 GONG Jian-ya2 1. Department of Surveying and Mapping Heilongjiang Institute of Technology Harbin 150008 China 2. National Laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan uni  
The main concepts and recent research trends of multi-scaled GIS are introduced. some typical vector data models are discussed. A centralized data model of multi-scaled GIS is designed. The model is realized in relation database structure.
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