QgsSlopeFilter Class Reference

Calculates slope values in a window of 3x3 cells based on first order derivatives in x- and y- directions. More...

#include <qgsslopefilter.h>

Inheritance diagram for QgsSlopeFilter:

Collaboration diagram for QgsSlopeFilter:

List of all members.

Public Member Functions
	QgsSlopeFilter (const QString &inputFile, const QString &outputFile, const QString &outputFormat)
	~QgsSlopeFilter ()
float	processNineCellWindow (float *x11, float *x21, float *x31, float *x12, float *x22, float *x32, float *x13, float *x23, float *x33)
	Calculates output value from nine input values.

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Detailed Description

Calculates slope values in a window of 3x3 cells based on first order derivatives in x- and y- directions.

Definition at line 24 of file qgsslopefilter.h.

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Constructor & Destructor Documentation

QgsSlopeFilter::QgsSlopeFilter	(	const QString &	inputFile,
		const QString &	outputFile,
		const QString &	outputFormat
	)

Definition at line 20 of file qgsslopefilter.cpp.

QgsSlopeFilter::~QgsSlopeFilter

(

)

Definition at line 26 of file qgsslopefilter.cpp.

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Member Function Documentation

float QgsSlopeFilter::processNineCellWindow	(	float *	x11,
		float *	x21,
		float *	x31,
		float *	x12,
		float *	x22,
		float *	x32,
		float *	x13,
		float *	x23,
		float *	x33
	)		[virtual]

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

Implements QgsDerivativeFilter.

Definition at line 31 of file qgsslopefilter.cpp.

References QgsDerivativeFilter::calcFirstDerX(), QgsDerivativeFilter::calcFirstDerY(), M_PI, and QgsNineCellFilter::mOutputNodataValue.

Referenced by QgsRelief::processNineCellWindow().

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The documentation for this class was generated from the following files:

• src/analysis/raster/qgsslopefilter.h
• src/analysis/raster/qgsslopefilter.cpp