Subgroup: other

Class: QgsAspectFilter¶

class qgis.analysis.QgsAspectFilter¶

Bases: qgis._analysis.QgsDerivativeFilter

Calculates aspect values in a window of 3x3 cells based on first order derivatives in x- and y- directions. Direction is clockwise starting from north*

Methods

calcFirstDerX

calcFirstDerY

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

calcFirstDerX()¶

calcFirstDerY()¶

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*