Subgroup: other
Class: QgsKernelDensityEstimation¶
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class
qgis.analysis.QgsKernelDensityEstimation¶ Bases:
sip.wrapperPerforms Kernel Density Estimation (“heatmap”) calculations on a vector layer.
New in version 3.0: Methods
addFeatureAdds a single feature to the KDE surface. finaliseFinalises the output file. preparePrepares the output file for writing and setups up the surface calculation. runRuns the KDE calculation across the whole layer at once. Attributes
DriverErrorFileCreationErrorInvalidParametersKernelEpanechnikovKernelQuarticKernelTriangularKernelTriweightKernelUniformOutputRawOutputScaledRasterIoErrorSuccess-
DriverError= 1¶
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FileCreationError= 3¶
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InvalidParameters= 2¶
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KernelEpanechnikov= 4¶
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KernelQuartic= 0¶
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class
KernelShape¶ Bases:
int
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KernelTriangular= 1¶
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KernelTriweight= 3¶
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KernelUniform= 2¶
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OutputRaw= 0¶
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OutputScaled= 1¶
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class
OutputValues¶ Bases:
int
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class
Parameters¶ Bases:
sip.wrapperQgsKernelDensityEstimation.Parameters(QgsKernelDensityEstimation.Parameters)
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decayRatio¶
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outputValues¶
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pixelSize¶
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radius¶
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radiusField¶
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shape¶
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source¶
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weightField¶
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RasterIoError= 4¶
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class
Result¶ Bases:
int
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Success= 0¶
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addFeature(self, feature: QgsFeature) → QgsKernelDensityEstimation.Result¶ Adds a single feature to the KDE surface. prepare() must be called before adding features.
See also
See also
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finalise(self) → QgsKernelDensityEstimation.Result¶ Finalises the output file. Must be called after adding all features via addFeature().
See also
See also
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prepare(self) → QgsKernelDensityEstimation.Result¶ Prepares the output file for writing and setups up the surface calculation. This must be called before adding features via addFeature().
See also
See also
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run(self) → QgsKernelDensityEstimation.Result¶ Runs the KDE calculation across the whole layer at once. Either call this method, or manually call run(), addFeature() and finalise() separately.
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