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Creating a Grid Surface from a DEM

Product Documentation
Intermediate
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Use the Grid Surface From DEM dialog box to create a grid surface.

A DEM file comes in several formats. You can import either USGS DEM, ESRI Arc Grid, or GeoTIFF files.

Tip

You can also import DEM files into an existing surface. For more information, see Adding DEM Files to a Surface.

For more information about DEM file data, see DEM Files.

Note

SDTS ( Spatial Data Transfer Standard ) DEMs are not supported in AutoCAD Civil 3D. There is a number of free utilities that you can download and use to convert SDTS data to the supported DEM format.

To create a surface from DEM data

  1. Click Home tabCreate Ground Data panelSurfaces drop-downCreate Surface From DEM.At the Command prompt, enter CreateSurfaceGridFromDEM.
  2. In the Grid Surface From DEM dialog box, browse to the location of the file.
  3. Select the DEM (.dem), GeoTIFF (.tif), ESRI ASCII Grid (.asc or .txt), or ESRI Binary Grid (.adf) file. The filename is displayed in the File Name field.
  4. Click Open.

Ribbon

Home tab Create Ground Data panel Surfaces drop-down Create Surface From DEM

Menu

Surfaces menu Create Surface From DEM

Toolspace Context Menu

Prospector tab: Right-click SurfacesCreate Surface From DEM

Command Line

CreateSurfaceGridFromDEM

Dialog Box

Grid Surface from DEM (standard file selection dialog box)


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