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Development Technology of DEM Application Based on Surfer Automation Objects

YANG Zhao-hui 1 ,DANG Li-hua 2 (1.Department of Urban&Environmentology,Suzhou Science&Technology University,Suzhou215011,China;2.Lu Da Traffic Engineering Supervise&Manager Consultation Ltd.Of Suzhou,Suzhou215007,China)  
DEM is a key point in GIS's research.The functions about3D view and3D analysis with DEM data are applied in many client application programs.But because of DEM data's complication,it is hard to realize these functions though programming development.So,author uses Surfer software 's new automation technology to solve this problem.And with some code examples,the DEM's application development technology based on the Surfer's automation objects is discussed.From the discussion,the advantages of quick programming and powerful functions are showed.
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