Component Gis Platform Geoobjects, The Design And Realization

Components Geographic Information System(GIS), the tendency of GIS technology, has brought a golden chance for the development of national GIS. ComGIS provides convenient and efficient functions of GIS for users depending on its good reuse. The paper is mainly about the process how to empolder the ComGIS platform basing on ATL, and something about COM, ComGIS, the theory of component software development, also the design and implement of the platformt.As people have deffrent comprehence toward spatial data model, it is diffiult for GIS to share spatial data, so GIS is considered as island of information. For the reason, we have built opening spatial data model to resolve the problem., and have a try to interoperate spatial data mutualy. Besides, the topics of the paper are as follow :1 We have a try to improve the performance of the system by the ways of the index and the cache.2 Talking about the way how to query attribute not depending on SQL of the database.3 Talking about the theory and methed how to build a independent and agility module of military plotting.My work consists of the design and implement of the query modul and military module , the design of the index and the exchange format. The quick show of map ,the opening data model supporting OGC and the agility and slinky military plotting module are three prominent characters of the paper.