Calculates the ruggedness index based on a 3x3 moving window. More...

Inheritance diagram for QgsRuggednessFilter:

Collaboration diagram for QgsRuggednessFilter:

Public Member Functions
	QgsRuggednessFilter (const QString &inputFile, const QString &outputFile, const QString &outputFormat)
	~QgsRuggednessFilter ()
Public Member Functions inherited from QgsNineCellFilter
	QgsNineCellFilter (const QString &inputFile, const QString &outputFile, const QString &outputFormat)
	Constructor that takes input file, output file and output format (GDAL string)
virtual	~QgsNineCellFilter ()
int	processRaster (QProgressDialog *p)
	Starts the calculation, reads from mInputFile and stores the result in mOutputFile.

Protected Member Functions
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.

Private Member Functions
	QgsRuggednessFilter ()

Additional Inherited Members
Protected Attributes inherited from QgsNineCellFilter
QString	mInputFile
QString	mOutputFile
QString	mOutputFormat
double	mCellSizeX
double	mCellSizeY
float	mInputNodataValue
	The nodata value of the input layer.
float	mOutputNodataValue
	The nodata value of the output layer.

Detailed Description

Calculates the ruggedness index based on a 3x3 moving window.

Algorithm from Riley et al. 1999: A terrain ruggedness index that quantifies topographic heterogeneity

Definition at line 25 of file qgsruggednessfilter.h.

Constructor & Destructor Documentation

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

Definition at line 20 of file qgsruggednessfilter.cpp.

QgsRuggednessFilter::~QgsRuggednessFilter ( )

Definition at line 31 of file qgsruggednessfilter.cpp.

QgsRuggednessFilter::QgsRuggednessFilter ( )

private

Definition at line 25 of file qgsruggednessfilter.cpp.

float QgsRuggednessFilter::processNineCellWindow	(	float *	x11,
		float *	x21,
		float *	x31,
		float *	x12,
		float *	x22,
		float *	x32,
		float *	x13,
		float *	x23,
		float *	x33
	)

protectedvirtual

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

Definition at line 36 of file qgsruggednessfilter.cpp.

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

/build/buildd/qgis-1.7.4+1.7.5~20120320/src/analysis/raster/qgsruggednessfilter.h
/build/buildd/qgis-1.7.4+1.7.5~20120320/src/analysis/raster/qgsruggednessfilter.cpp