![]() ![]() The CHELEV.LSP file can be downloaded from Download. Just pick two points connecting a line climbing across the contour set and specify the bottom elevation and the contour step. ![]() The LISP utility CHELEV (command CHELEV) can easily assign proper elevation (Z) to a set of contours. But a simple LISP utility can simplify generating a terrain model in AutoCAD Civil 3D or AutoCAD.Ī sample data can be download from the drawing file LOM. You obviously cannot directly generate digital terrain model (DTM, topo) from such source data. ![]() If you need to use a supplied survey data to create a 3D terrain model (DTM) you can sometimes find that the input data are just 2D contours (polylines) without any assigned elevation (Z-coordinate) - just a flat plan view. Assigning elevations to 2D contours (isolines). ![]()
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