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scremin posted a topic in AutoLISP, Visual LISP & DCLHello everyone, I am quite new here in this forum and I was expecting some help. Recently I've been working with water distribution models and I just faced a wasting time problem when working with elevation data. People in my office have to look for every elevation data in the topografic dwg and then write down all those numbers one by one in an Excel spreadsheet. I think this process is kinda waste of time, so I came here looking for some help. If anyone could help me I would apreciate it very much. Basicaly, what I do actualy need is a lisp routine capable of converting a 3Dpolyline to a 2Dpolyline but changing also the 3D polylines' vector Z to the 2D polylines' elevation. For example: if I have a 3d polyline with vector Z value of 350 (meters), I want the lisp program to turn it into a 2D polyline with Elevation value of 350. Thanks in advance..