Powercommap Design And Development

Components Geography Information System( ComGIS), the latest tendency of GIS technology, coming with the rapid development of GIS and component object model ( COM) , has brought a golden chance for national GIS to catch up with the world record.PowerComMap is a component GIS platform, composed with an ActiveX and a serial of automations. It is easy for users to add GIS and mapping function to any. system that based on Microsoft Windows system.The paper is mainly about the design and development of the platform, and something about COM, ComGIS, the theory of component software development, also the design and implement of data access component.The dual-interface data access component based on OLE DB and data model supporting OGC are the two prominent characteristics of the paper.