3.3.5 Topographic Position Index (TPI)

Topographic Position Index (TPI) Widget

Fig. 3.12 Topographic Position Index (TPI) Widget

The TPI widget creates a new raster based on the calculated Topographic Position Index (TPI) from an input DEM raster.

3.3.5.1 Usage

  1. Select the input DEM raster. You can either select from imported rasters using the Input
    combo box or select one from your PC (1).
  2. Select the output TPI raster location. You can either type in the absolute file path
    yourself or pick one with a dialog (2).

  3. Start the calculation (4)

If you want to use the created TPI raster in your LSAT Project you need to import it using the Import Raster Widget.

Clicking on Cancel (3) closes the widget.

3.3.5.2 Input and Output

Input

Digital Elevation Model raster dataset (.tif)

Output

Topographic Position Index (TPI) raster dataset (.tif)