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GIS spatial data updating service mode and implementing strategy

WANG Yu-hong(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 430072,China)  
Data is "blood" of GIS and updating can make GIS more vigorous.While data producers attach importance to revise their own database by modern surveying and mapping technology such as RS and GPS,they should also study how to enable data users to utilize this updating information to update users' databases and keep them current.This paper discussed the development tendency from data sharing to updating service.Then,it introduced two basic delivery modes for updating information and discussed current implementation status of GIS spatial data updating service.Finally the technical implementation framework that uses bulk data to update client database was proposed.
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