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《Journal of Anshan University of Science and Technology》 2004-05
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Creating urban DEM by use of topographic map with DWG format

MA Chi~(1,2),SONG Wei-dong~2(1.Dept.of Surveying Engineering,Liaoning Technical University,Fuxin 123000,China;2.Vocational College,Shenyang Agriculatural University,Shenyang 110122,China)  
VBA is a VB language embeded into AutoCAD which can be used to develop AutoCAD by ActiveX Automation interface.By using VBA,we can extract discrete elevation points and elevation annotions and store them in pairs;We can also extract elevation information by discretization of equal-high lines,eliminate errors of the extracted elevation data by the 3D method in ArcGIS and create DEM at last.Practice proves this method,being both fast and precise, is an ideal way of creating city DEM.
【CateGory Index】: P28
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