Feature Description

DEM lake carving has significant application value. Traditional DEM construction methods using point or line data can only represent macro-terrain features, but fail to depict micro-terrain features like lakes, depressions, and glaciers. The DEM lake carving function helps accurately represent these features in DEMs. During the process, it obtains elevation information of lakes or depressions and assigns these values to corresponding DEM cells. For more details, see DEM Construction Overview.

The application provides two approaches for DEM lake carving: 1) Perform lake carving during DEM construction to generate final DEM data with lakes; 2) First construct DEM then perform lake carving operation. For the first method, refer to the Build DEM page. This page focuses on the second approach.

Feature Entry

• Spatial Analysis Tab -> Raster Analysis group -> Build DEM -> DEM Lake Carving.
• Toolbox -> Raster Analysis -> Build DEM -> DEM Lake Carving.

Parameter Description

• DEM Lake Carving: Specify the DEM dataset for lake carving. Select the datasource and DEM dataset containing target DEM data.
• Lake Data: Configure lake region data. Select the datasource and region dataset containing lake features.
• Elevation configuration: Two methods are provided:
  • Elevation Field: Select this radio button to use a field from the region dataset as elevation source.
  • Altitude:: Select this radio button to manually input elevation value in the text box.