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Forums >> Revit Building >> Technical Support >> Toposurface Using Imported Instance
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Joined: Wed, Jun 20, 2007
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I am having trouble creating a toposurface by using the imported instance. The dxf is from a company called Promap who provide OS Maps and also DSM (Digital Surface Modelling) Height data in dxf format. When I click on the imported dxf, the add points from selected layers dialogue box appears with only two layers: 0 & Height Point. This seems a little strange as normally there are numerous layers. So i click OK and finish surface, but no surface is generated. I've tried to explode the dxf to see if the block is separated into various points and a warning comes up saying import contained 3D date or points which cant be exploded. Only 2D data was exploded. Ive also tried to use a dwg instead of a dxf and this does the same. I am really struggling with this one and any assistance available will be much appreciated. I've attached the dxf's for reference.
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Joined: Sun, Nov 27, 2005
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Bummer.. The points are made out of "Nodes". Revit is not able to read it. I tried a few things and the best I can figure is to connect the dots with lines. I set the osnap to "Nodes" and just click from node to node. Then the import will work. It will take a few minutes to do it. 1073 points. The only other thing that you might try is to contact the company that did the Point drawgin in cad and see if they can give you point file. x,y,z points just listed in a text file. Let me know how it goes..
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Thanks for that robinballew. Just tried it out and that looks fab! the only other problem i have now is that I dont have autocad on my computer do be able to connect the dots with lines. Im using revit 9.1 so it didnt come with it! Nightmare! In response to your other suggestion, I thought of getting the data as a points file, however the company who supply the height data to promap are an american company who are apparently difficult to contact. I had a look on their website and they dont have any contact information on there. 
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45698_Platt_DSM_.dxf
45701_45698PlattDSM1.dwg