Download and Build a USGS DEM Surface
5/29/2025
Christopher Fugitt demos one method of how to download and build a USGS DEM Surface in Civil 3D.
See the @C3DReminders YouTube Channel
Comments
Be careful to size the area of interest appropriately and do not ignore the coordinate system details.
It is easy to produce a very large surface from the public USGS DEM datasets.
The Civil 3D 2026+ release performs better with larger surfaces.
Civil 3D 2026+ also allows us to further clip the surface when it is DREFed into other drawings.