Gambit Posted February 3, 2012 Share Posted February 3, 2012 (edited) Hello All, I am using Civil 3d 2010. I am trying to make a slope analysis. Slope analysis made from a TIN surface look terrible graphically, though they may be more accurate. With that said... 1. Exporting my TIN surface to a DEM does not give me a nice gridded point file as I would expect. Instead it is terraced, not the real surface of the ground. Running a slope analysis on that would give me two results flat and near vertical. How do I get a DEM output that data that is true to the earth? See attached 2. How can I make a Grid Surface from contours as that is the only data I have? 3. 80% of the work I do is in the USA. I do not want to work in metrics whenI am trying to geo reference the exported DEM. It always ends up scaled downand in the wrong place. Is there a work around to get it to be in feet and project correctly? Thanks so much! Note: Posted this in the wrong category before so sorry about the double post, I will try to delete the other. Terraced Crap.dwg Edited February 4, 2012 by Gambit Quote Link to comment Share on other sites More sharing options...
ScribbleJ Posted February 6, 2012 Share Posted February 6, 2012 If you make the grid interval less than the resolution you have it at now it will give you a better look. Try going to 0.25 foot (or less if your PC can handle it). 2 foot intervals is not that great of a resolution for what your trying to achieve. Quote Link to comment Share on other sites More sharing options...
Gambit Posted February 6, 2012 Author Share Posted February 6, 2012 Scribble, Thanks for the response. I have done a grid spacing of 1 foot, this is a huge area (2300'x2300') so 25' grid spacing is fine. The problem is that it comes out terraced not true to ground. That attachment shows the terracing. I can't figure out why it is doing that. Quote Link to comment Share on other sites More sharing options...
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