Finally, you can tweak some of the topography graphics. So I have set the Project Base Point elevation to 100’ below the Survey Point elevation at the first floor (6510’-100’=6410’).ĥ. EVstudio standards require the first floor elevation to be at 100’. If your project base point and elevation are off, you can just unclip the project base point and move it to the desired elevation. This is a good way to check that you have both set correctly. I am showing two levels below – one is based on the project base point and the other is based on the survey point. In an elevation view add a level for your first floor. You can go ahead and hide the imported CAD file as you should only need it for reference now.Ĥ. So just move it (along with the imported CAD file) in an elevation view until the spot elevation matches up. Your toposurface is probably not at the right elevation. In your plan view, add a spot elevation (the elevation origin of this spot elevation should be set to Survey Point). These are the contour layers that you made a note of in Step 1.Ĭlick OK on this window and Revit will create a toposurface with points based on the layers you selected.Ĭlick on the check mark in the ribbon menu and your topo surface is complete.ģ. Next you will be presented with window where you can pick only the contour layers to use for the topography. Select the CAD site plan that you just imported. Select the Create from Import dropdown and then click Select Import Instance. In the Massing & Site ribbon, click on Toposurface. Make sure that “Current View Only” is unchecked.Ĭlick open, and your imported CAD file should be visible.ģ. Go to the Insert Ribbon and click on Import CAD.
It’s ok if there are other lines on other, non-contour layers.Ģ. Check that only the topography lines are on these layers and not some other miscellaneous lines. Civil engineers typically label topography layers contours, major contours, and/or minor contours. We are going to tell Revit which layers to import from this CAD drawing. While you have AutoCAD open, you can go ahead and make a mental note of the layer names for the topography lines. You can also orbit the drawing to check that the topo lines create a legible surface. You can easily check this in AutoCAD if you click on a topo line and look at the elevation in the properties panel. It has to be a CAD file with the topography represented in the 3 dimensions. Inspect the CAD file the civil engineer gave you. For this example, I am using a Survey Point of 6,460′ (USGS Elevation) which corresponds to the first topo line on the Northeast corner of my site plan.ġ. When we receive their CAD file for a site, we have to import it into Revit to create a topography surface that we can then edit.īefore you create topography in Revit, make sure that your Survey Point is set to a known elevation on your topography.
Civil engineers typically use a 3D CAD program to model topography for a site.
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