Subgroup: other

Class: QgsRuggednessFilter

class qgis.analysis.QgsRuggednessFilter

Bases: qgis._analysis.QgsNineCellFilter

Calculates the ruggedness index based on a 3x3 moving window. Algorithm from Riley et al. 1999: A terrain ruggedness index that quantifies topographic heterogeneity*

Methods

cellSizeX
cellSizeY
inputNodataValue
outputNodataValue
processNineCellWindow	Calculates output value from nine input values.
processRaster	Starts the calculation, reads from mInputFile and stores the result in mOutputFile
setCellSizeX
setCellSizeY
setInputNodataValue
setOutputNodataValue
setZFactor
zFactor

Attributes

processNineCellWindow(self) → Tuple[float, float, float, float, float, float, float, float, float, float]

Calculates output value from nine input values. The input values and the output value can be equal to the nodata value if not present or outside of the border. Must be implemented by subclasses*