The following content requires the use of Scalable Terrain Models which is only available with Bentley Descartes or Bentley Map Enterprise.
In a 3D design file, ensure a valid Geographic Coordinate System has been attached.
Select File > Scalable Terrain Model
Select the New button and create the STM file in a folder of your choice. The New STM Settings dialog will open.
In the Calculated Features Display pane, turn on the Contours and turn off the Triangles and Draped Rasters.
The new STM is added to the Scalable Terrain Model dialog and the STM Elevation Source Editor opens.
In the Source Editor, add your DEM:
When all of the source elevation data has been added, generate the STM. Note that this may take some time depending on the volume of data to process.
If needed, fit the view to see the contours
Contour symbology and spacing can be edited via the Element Information dialog.
First select the STM, then choose the Element Information tool.
Expand and edit each node to obtain the desired results.
Note: An alternate workflow is to attach the DEM via the Raster Manager. Then select Utilities > Scalable Terrain Model from the Raster Manager menu.