Base class for raster analysis methods that work with a 3x3 cell filter and calculate the value of each cell based on the cell value and the eight neighbour cells. More...

#include <qgsninecellfilter.h>

Inheritance diagram for QgsNineCellFilter:

[legend]

Public Member Functions
	QgsNineCellFilter (const QString &inputFile, const QString &outputFile, const QString &outputFormat)
	Constructor that takes input file, output file and output format (GDAL string)
virtual	~QgsNineCellFilter ()
double	cellSizeX () const
double	cellSizeY () const
double	inputNodataValue () const
double	outputNodataValue () const
virtual float	processNineCellWindow (float x11, float x21, float x31, float x12, float x22, float x32, float x13, float x23, float *x33)=0
	Calculates output value from nine input values.
int	processRaster (QProgressDialog *p)
	Starts the calculation, reads from mInputFile and stores the result in mOutputFile.
void	setCellSizeX (double size)
void	setCellSizeY (double size)
void	setInputNodataValue (double value)
void	setOutputNodataValue (double value)
void	setZFactor (double factor)
double	zFactor () const

Protected Attributes
double	mCellSizeX
double	mCellSizeY
QString	mInputFile
float	mInputNodataValue
	The nodata value of the input layer.
QString	mOutputFile
QString	mOutputFormat
float	mOutputNodataValue
	The nodata value of the output layer.
double	mZFactor
	Scale factor for z-value if x-/y- units are different to z-units (111120 for degree->meters and 370400 for degree->feet)

Detailed Description

Base class for raster analysis methods that work with a 3x3 cell filter and calculate the value of each cell based on the cell value and the eight neighbour cells.

Common examples are slope and aspect calculation in DEMs. Subclasses only implement the method that calculates the new value from the nine values. Everything else (reading file, writing file) is done by this subclass

Definition at line 30 of file qgsninecellfilter.h.

Constructor & Destructor Documentation

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

Constructor that takes input file, output file and output format (GDAL string)

Definition at line 29 of file qgsninecellfilter.cpp.

QgsNineCellFilter::~QgsNineCellFilter ( )

virtual

Definition at line 51 of file qgsninecellfilter.cpp.

Member Function Documentation

double QgsNineCellFilter::cellSizeX ( ) const

inline

Definition at line 41 of file qgsninecellfilter.h.

double QgsNineCellFilter::cellSizeY ( ) const

inline

Definition at line 43 of file qgsninecellfilter.h.

double QgsNineCellFilter::inputNodataValue ( ) const

inline

Definition at line 49 of file qgsninecellfilter.h.

double QgsNineCellFilter::outputNodataValue ( ) const

inline

Definition at line 51 of file qgsninecellfilter.h.

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

pure 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

Implemented in QgsRuggednessFilter, QgsTotalCurvatureFilter, QgsAspectFilter, QgsHillshadeFilter, QgsSlopeFilter, and QgsDerivativeFilter.

int QgsNineCellFilter::processRaster ( QProgressDialog * p )

Starts the calculation, reads from mInputFile and stores the result in mOutputFile.

Parameters

p	progress dialog that receives update and that is checked for abort. 0 if no progress bar is needed.

Returns: 0 in case of success

Definition at line 56 of file qgsninecellfilter.cpp.

void QgsNineCellFilter::setCellSizeX ( double size )

inline

Definition at line 42 of file qgsninecellfilter.h.

void QgsNineCellFilter::setCellSizeY ( double size )

inline

Definition at line 44 of file qgsninecellfilter.h.

void QgsNineCellFilter::setInputNodataValue ( double value )

inline

Definition at line 50 of file qgsninecellfilter.h.

void QgsNineCellFilter::setOutputNodataValue ( double value )

inline

Definition at line 52 of file qgsninecellfilter.h.

void QgsNineCellFilter::setZFactor ( double factor )

inline

Definition at line 47 of file qgsninecellfilter.h.

double QgsNineCellFilter::zFactor ( ) const

inline

Definition at line 46 of file qgsninecellfilter.h.

Member Data Documentation

double QgsNineCellFilter::mCellSizeX

protected

Definition at line 79 of file qgsninecellfilter.h.

double QgsNineCellFilter::mCellSizeY

protected

Definition at line 80 of file qgsninecellfilter.h.

QString QgsNineCellFilter::mInputFile

protected

Definition at line 75 of file qgsninecellfilter.h.

float QgsNineCellFilter::mInputNodataValue

protected

The nodata value of the input layer.

Definition at line 82 of file qgsninecellfilter.h.

QString QgsNineCellFilter::mOutputFile

protected

Definition at line 76 of file qgsninecellfilter.h.

QString QgsNineCellFilter::mOutputFormat

protected

Definition at line 77 of file qgsninecellfilter.h.

float QgsNineCellFilter::mOutputNodataValue

protected

The nodata value of the output layer.

Definition at line 84 of file qgsninecellfilter.h.

double QgsNineCellFilter::mZFactor

protected

Scale factor for z-value if x-/y- units are different to z-units (111120 for degree->meters and 370400 for degree->feet)

Definition at line 86 of file qgsninecellfilter.h.

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

/tmp/buildd/qgis-2.8.2+12wheezy/src/analysis/raster/qgsninecellfilter.h
/tmp/buildd/qgis-2.8.2+12wheezy/src/analysis/raster/qgsninecellfilter.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation