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《Science of Surveying and Mapping》 2005-03
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Research on automatic updating of GIS data

FAN Da-zhao,ZHANG yong-sheng,LEI Rong,GUO Hai-tao(Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052)  
It is vital to keep GIS data “fresh” for application and development of GIS.This paper describes a general process for automatic data updating of GIS,discusses three basic methods of change detection,and analyses the characteristic of these methods.Finally,the outlook are presented for further studies.
【CateGory Index】: P208
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