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AN ASSESSMENT ABOUT SEVERAL GEOGRAPHICAL INFORMATION SYSTEM

HeXiang(Geographcal Department,Yunnan Normal University)  
It is an important problem to select a GIS software system according to rightassrssment of GIS systems about their functions,features of work area, etc,In this article,some im-portant points inassessment and selection processes were disscussed,several widely used GISsoftware systems were assessed,and some usefull suggestion were pointed out.
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