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# Civil 3D Percent Slope

 Author Message    Topic Search   Topic Options greatsyd Newbie Joined: 22.Jan.2019 Location: Belgium Using: Civil3D, Cyclone, BricsCAD, Spatial Analyzer Status: Offline Points: 5 Post Options    Thanks(0)    Quote  Reply Topic: Civil 3D Percent Slope    Posted: 24.Jan.2019 at 13:34 Can anybody tell me how Civil calculates the percentage of Slopes?Thank you very much! Trial and "FATAL ERROR" is the key to success! nkiakas Newbie Joined: 01.Jun.2017 Location: Greece Using: AutoCAD,Civil3D,Revit Status: Offline Points: 1 Post Options    Thanks(0)    Quote  Reply Posted: 27.Mar.2019 at 07:49 Civil 3d calclulates triangles.These triangles have a specific and only one slope.So when civil 3d returns the slope, in fanct returns the slope of each triangle.In fact the slope of each triangle is a slope of a "straight furface", coming from the 3 points of the triangle.I hope i helped you c.chambers Newbie Joined: 17.Mar.2019 Location: Canada Using: AutoCAD 2019, Civil 3D 2019 Status: Offline Points: 9 Post Options    Thanks(0)    Quote  Reply Posted: 28.Mar.2019 at 01:35 Are asking about the specifi formula Civil 3D uses ? If so, Civil 3D creates surfaces using the Delaunay triangulation method. from there slopes are derived use the triangles as described by nkiakasC. ChambersInfratech Civilhttps://infratechcivil.com C. Chambers, Civil Application Specialist---www.infratechcivil.com