SIMPLIFY command change z of polyline - CIVIL Topic
When I use Simplify command with few polylines that have z value the command chanche the z value of all of the polylines.
I want to use it to reduce the topographic contour lines that I extract from other software, that generate lot of points. Anyone have the same problem or knows why it happen?
Thanks you
Comments
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Just google "Reduce pline vertices autolisp" Weed.lsp is a reduce program as one example.
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If the polylines represent contour lines, then they are likely 2D heavy weight or light weight polylines. If this is the case, then I would try using the CONVERTPOLY command to switch the polyline type. Potentially changing the type will help when you use SIMPLIFY.
As a general rule you should try to avoid using contour lines like this generated from other applications. It just creates problems like the one you've encountered, it also tends to cause performance issues. Better to ask for the source data used to generate the contours from, such as 3DFACES, LandXML, or Civil3D .dwg file. This would allow you to generate a TIN surface in BricsCAD, which has properties to display contour lines, as well as extract them if you need to.
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