xdem.DEM.terrain_ruggedness_index#

DEM.terrain_ruggedness_index(method='Riley', window_size=3)[source]#

Calculates the Terrain Ruggedness Index, the cumulated differences to neighbouring pixels. Output is in the unit of the DEM (typically meters).

Based either on:

Riley et al. (1999), http://download.osgeo.org/qgis/doc/reference-docs/Terrain_Ruggedness_Index.pdf that derives
the squareroot of squared differences to neighbouring pixels, preferred for topography.
Wilson et al. (2007), http://dx.doi.org/10.1080/01490410701295962 that derives the mean absolute difference to
neighbouring pixels, preferred for bathymetry.

Parameters:

method (str) – The algorithm used (“Riley” for topography or “Wilson” for bathymetry).
window_size (int) – The size of the window for deriving the metric.

Raises:

ValueError – If the inputs are poorly formatted.

Return type:

TypeVar(RasterType, bound= Raster)

xdem.DEM.terrain_ruggedness_index