QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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Classes | Public Types | Public Member Functions | Static Public Member Functions | List of all members
QgsRasterFileWriter Class Reference

The raster file writer which allows you to save a raster to a new file. More...

#include <qgsrasterfilewriter.h>

Classes

struct  FilterFormatDetails
 Details of available filters and formats. More...
 

Public Types

enum  RasterFormatOption { SortRecommended = 1 << 1 }
 Options for sorting and filtering raster formats. More...
 

Public Member Functions

 QgsRasterFileWriter (const QString &outputUrl)
 Constructor for QgsRasterFileWriter, writing to the specified output URL/filename.
 
Qgis::RasterBuildPyramidOption buildPyramidsFlag () const
 Returns the pyramid building option.
 
QgsRasterDataProvidercreateMultiBandRaster (Qgis::DataType dataType, int width, int height, const QgsRectangle &extent, const QgsCoordinateReferenceSystem &crs, int nBands) SIP_FACTORY
 Create a raster file with given number of bands without initializing the pixel data.
 
QgsRasterDataProvidercreateOneBandRaster (Qgis::DataType dataType, int width, int height, const QgsRectangle &extent, const QgsCoordinateReferenceSystem &crs) SIP_FACTORY
 Create a raster file with one band without initializing the pixel data.
 
QStringList createOptions () const
 Returns the list of data source creation options which will be used when creating the output raster file.
 
int maxTileHeight () const
 Returns the maximum tile height (in pixels) for tiled outputs.
 
int maxTileWidth () const
 Returns the maximum tile width (in pixels) for tiled outputs.
 
QString outputFormat () const
 Returns the output format.
 
QString outputProviderKey () const
 Returns the name of the data provider for the raster output.
 
QString outputUrl () const
 Returns the output URL (filename) for the raster.
 
QStringList pyramidsConfigOptions () const
 Returns the list of configuration options used when creating the pyramids for the output raster file.
 
Qgis::RasterPyramidFormat pyramidsFormat () const
 Returns the raster pyramid format.
 
QList< int > pyramidsList () const
 Returns the list of pyramids which will be created for the output file.
 
QString pyramidsResampling () const
 
void setBuildPyramidsFlag (Qgis::RasterBuildPyramidOption f)
 Sets the pyramid building option.
 
void setCreateOptions (const QStringList &list)
 Sets a list of data source creation options to use when creating the output raster file.
 
void setMaxTileHeight (int h)
 Sets the maximum tile height (in pixels) for tiled outputs.
 
void setMaxTileWidth (int w)
 Sets the maximum tile width (in pixels) for tiled outputs.
 
void setOutputFormat (const QString &format)
 Sets the output format.
 
void setOutputProviderKey (const QString &key)
 Sets the name of the data provider for the raster output.
 
void setPyramidsConfigOptions (const QStringList &list)
 Sets a list of configuration options to use when creating the pyramids for the output raster file.
 
void setPyramidsFormat (Qgis::RasterPyramidFormat f)
 Sets the raster pyramid format.
 
void setPyramidsList (const QList< int > &list)
 Sets the list of pyramids which will be created for the output file.
 
void setPyramidsResampling (const QString &str)
 
void setTiledMode (bool t)
 Sets whether the output should be tiled.
 
bool tiledMode () const
 Returns whether the output will be tiled.
 
Qgis::RasterFileWriterResult writeRaster (const QgsRasterPipe *pipe, int nCols, int nRows, const QgsRectangle &outputExtent, const QgsCoordinateReferenceSystem &crs, const QgsCoordinateTransformContext &transformContext, QgsRasterBlockFeedback *feedback=nullptr)
 Write raster file.
 
Q_DECL_DEPRECATED Qgis::RasterFileWriterResult writeRaster (const QgsRasterPipe *pipe, int nCols, int nRows, const QgsRectangle &outputExtent, const QgsCoordinateReferenceSystem &crs, QgsRasterBlockFeedback *feedback=nullptr) SIP_DEPRECATED
 Write raster file.
 

Static Public Member Functions

static QString driverForExtension (const QString &extension)
 Returns the GDAL driver name for a specified file extension.
 
static QStringList extensionsForFormat (const QString &format)
 Returns a list of known file extensions for the given GDAL driver format.
 
static QString filterForDriver (const QString &driverName)
 Creates a filter for an GDAL driver key.
 
static QList< QgsRasterFileWriter::FilterFormatDetailssupportedFiltersAndFormats (RasterFormatOptions options=SortRecommended)
 Returns a list or pairs, with format filter string as first element and GDAL format key as second element.
 
static QStringList supportedFormatExtensions (RasterFormatOptions options=SortRecommended)
 Returns a list of file extensions for supported formats.
 

Detailed Description

The raster file writer which allows you to save a raster to a new file.

The writer defaults to creating GeoTIFF outputs using GDAL. Alternative formats and data providers can be used by calling setOutputFormat() and setOutputProviderKey().

Definition at line 40 of file qgsrasterfilewriter.h.

Member Enumeration Documentation

◆ RasterFormatOption

Options for sorting and filtering raster formats.

Since
QGIS 3.0
Enumerator
SortRecommended 

Use recommended sort order, with extremely commonly used formats listed first.

Definition at line 48 of file qgsrasterfilewriter.h.

Constructor & Destructor Documentation

◆ QgsRasterFileWriter()

QgsRasterFileWriter::QgsRasterFileWriter ( const QString &  outputUrl)

Constructor for QgsRasterFileWriter, writing to the specified output URL/filename.

Definition at line 66 of file qgsrasterfilewriter.cpp.

Member Function Documentation

◆ buildPyramidsFlag()

Qgis::RasterBuildPyramidOption QgsRasterFileWriter::buildPyramidsFlag ( ) const
inline

Returns the pyramid building option.

See also
setBuildPyramidsFlag()

Definition at line 196 of file qgsrasterfilewriter.h.

◆ createMultiBandRaster()

QgsRasterDataProvider * QgsRasterFileWriter::createMultiBandRaster ( Qgis::DataType  dataType,
int  width,
int  height,
const QgsRectangle extent,
const QgsCoordinateReferenceSystem crs,
int  nBands 
)

Create a raster file with given number of bands without initializing the pixel data.

Returned provider may be used to initialize the raster using writeBlock() calls. Ownership of the returned provider is passed to the caller.

Returns
Instance of data provider in editing mode (on success) or nullptr on error.
Note
Does not work with tiled mode enabled.
Since
QGIS 3.0

Definition at line 54 of file qgsrasterfilewriter.cpp.

◆ createOneBandRaster()

QgsRasterDataProvider * QgsRasterFileWriter::createOneBandRaster ( Qgis::DataType  dataType,
int  width,
int  height,
const QgsRectangle extent,
const QgsCoordinateReferenceSystem crs 
)

Create a raster file with one band without initializing the pixel data.

Returned provider may be used to initialize the raster using writeBlock() calls. Ownership of the returned provider is passed to the caller.

Returns
Instance of data provider in editing mode (on success) or nullptr on error.
Note
Does not work with tiled mode enabled.
Since
QGIS 3.0

Definition at line 42 of file qgsrasterfilewriter.cpp.

◆ createOptions()

QStringList QgsRasterFileWriter::createOptions ( ) const
inline

Returns the list of data source creation options which will be used when creating the output raster file.

See also
setCreateOptions()

Definition at line 268 of file qgsrasterfilewriter.h.

◆ driverForExtension()

QString QgsRasterFileWriter::driverForExtension ( const QString &  extension)
static

Returns the GDAL driver name for a specified file extension.

E.g. the driver name for the ".tif" extension is "GTiff". If no suitable drivers are found then an empty string is returned.

Note that this method works for all GDAL drivers, including those without create support (and which are not supported by QgsRasterFileWriter).

Since
QGIS 3.0

Definition at line 1066 of file qgsrasterfilewriter.cpp.

◆ extensionsForFormat()

QStringList QgsRasterFileWriter::extensionsForFormat ( const QString &  format)
static

Returns a list of known file extensions for the given GDAL driver format.

E.g. returns "tif", "tiff" for the format "GTiff".

If no matching format driver is found an empty list will be returned.

Note that this method works for all GDAL drivers, including those without create support (and which are not supported by QgsRasterFileWriter).

Since
QGIS 3.0

Definition at line 1101 of file qgsrasterfilewriter.cpp.

◆ filterForDriver()

QString QgsRasterFileWriter::filterForDriver ( const QString &  driverName)
static

Creates a filter for an GDAL driver key.

Definition at line 1115 of file qgsrasterfilewriter.cpp.

◆ maxTileHeight()

int QgsRasterFileWriter::maxTileHeight ( ) const
inline

Returns the maximum tile height (in pixels) for tiled outputs.

See also
maxTileWidth()
setMaxTileHeight()
tiledMode()

Definition at line 252 of file qgsrasterfilewriter.h.

◆ maxTileWidth()

int QgsRasterFileWriter::maxTileWidth ( ) const
inline

Returns the maximum tile width (in pixels) for tiled outputs.

See also
maxTileHeight()
setMaxTileWidth()
tiledMode()

Definition at line 189 of file qgsrasterfilewriter.h.

◆ outputFormat()

QString QgsRasterFileWriter::outputFormat ( ) const
inline

Returns the output format.

For GDAL disk based outputs this will match the GDAL driver name, e.g. "GTiff" for GeoTiff exports.

See also
setOutputFormat()

Definition at line 138 of file qgsrasterfilewriter.h.

◆ outputProviderKey()

QString QgsRasterFileWriter::outputProviderKey ( ) const
inline

Returns the name of the data provider for the raster output.

See also
setOutputProviderKey()

Definition at line 154 of file qgsrasterfilewriter.h.

◆ outputUrl()

QString QgsRasterFileWriter::outputUrl ( ) const
inline

Returns the output URL (filename) for the raster.

Since
QGIS 3.0

Definition at line 120 of file qgsrasterfilewriter.h.

◆ pyramidsConfigOptions()

QStringList QgsRasterFileWriter::pyramidsConfigOptions ( ) const
inline

Returns the list of configuration options used when creating the pyramids for the output raster file.

See also
setPyramidsConfigOptions()

Definition at line 284 of file qgsrasterfilewriter.h.

◆ pyramidsFormat()

Qgis::RasterPyramidFormat QgsRasterFileWriter::pyramidsFormat ( ) const
inline

Returns the raster pyramid format.

See also
setPyramidsFormat()

Definition at line 227 of file qgsrasterfilewriter.h.

◆ pyramidsList()

QList< int > QgsRasterFileWriter::pyramidsList ( ) const
inline

Returns the list of pyramids which will be created for the output file.

See also
setPyramidsList()

Definition at line 210 of file qgsrasterfilewriter.h.

◆ pyramidsResampling()

QString QgsRasterFileWriter::pyramidsResampling ( ) const
inline

Definition at line 219 of file qgsrasterfilewriter.h.

◆ setBuildPyramidsFlag()

void QgsRasterFileWriter::setBuildPyramidsFlag ( Qgis::RasterBuildPyramidOption  f)
inline

Sets the pyramid building option.

See also
buildPyramidsFlag()

Definition at line 203 of file qgsrasterfilewriter.h.

◆ setCreateOptions()

void QgsRasterFileWriter::setCreateOptions ( const QStringList &  list)
inline

Sets a list of data source creation options to use when creating the output raster file.

See also
createOptions()

Definition at line 260 of file qgsrasterfilewriter.h.

◆ setMaxTileHeight()

void QgsRasterFileWriter::setMaxTileHeight ( int  h)
inline

Sets the maximum tile height (in pixels) for tiled outputs.

See also
maxTileHeight()
setMaxTileWidth()
tiledMode()

Definition at line 243 of file qgsrasterfilewriter.h.

◆ setMaxTileWidth()

void QgsRasterFileWriter::setMaxTileWidth ( int  w)
inline

Sets the maximum tile width (in pixels) for tiled outputs.

See also
maxTileWidth()
setMaxTileHeight()
tiledMode()

Definition at line 180 of file qgsrasterfilewriter.h.

◆ setOutputFormat()

void QgsRasterFileWriter::setOutputFormat ( const QString &  format)
inline

Sets the output format.

For GDAL disk based outputs this should match the GDAL driver name, e.g. "GTiff" for GeoTiff exports.

See also
outputFormat()

Definition at line 129 of file qgsrasterfilewriter.h.

◆ setOutputProviderKey()

void QgsRasterFileWriter::setOutputProviderKey ( const QString &  key)
inline

Sets the name of the data provider for the raster output.

E.g. set to "gdal" to use GDAL to create disk based raster files.

See also
outputProviderKey()

Definition at line 147 of file qgsrasterfilewriter.h.

◆ setPyramidsConfigOptions()

void QgsRasterFileWriter::setPyramidsConfigOptions ( const QStringList &  list)
inline

Sets a list of configuration options to use when creating the pyramids for the output raster file.

See also
pyramidsConfigOptions()

Definition at line 276 of file qgsrasterfilewriter.h.

◆ setPyramidsFormat()

void QgsRasterFileWriter::setPyramidsFormat ( Qgis::RasterPyramidFormat  f)
inline

Sets the raster pyramid format.

See also
pyramidsFormat()

Definition at line 234 of file qgsrasterfilewriter.h.

◆ setPyramidsList()

void QgsRasterFileWriter::setPyramidsList ( const QList< int > &  list)
inline

Sets the list of pyramids which will be created for the output file.

See also
pyramidsList()

Definition at line 217 of file qgsrasterfilewriter.h.

◆ setPyramidsResampling()

void QgsRasterFileWriter::setPyramidsResampling ( const QString &  str)
inline

Definition at line 220 of file qgsrasterfilewriter.h.

◆ setTiledMode()

void QgsRasterFileWriter::setTiledMode ( bool  t)
inline

Sets whether the output should be tiled.

Tiled outputs will automatically split the raster into multiple parts, based on the maxTileWidth() value.

See also
tiledMode()

Definition at line 164 of file qgsrasterfilewriter.h.

◆ supportedFiltersAndFormats()

QList< QgsRasterFileWriter::FilterFormatDetails > QgsRasterFileWriter::supportedFiltersAndFormats ( RasterFormatOptions  options = SortRecommended)
static

Returns a list or pairs, with format filter string as first element and GDAL format key as second element.

Relies on GDAL_DMD_EXTENSIONS metadata, if it is empty corresponding driver will be skipped even if supported.

The options argument can be used to control the sorting and filtering of returned formats.

See also
supportedFormatExtensions()

Definition at line 1139 of file qgsrasterfilewriter.cpp.

◆ supportedFormatExtensions()

QStringList QgsRasterFileWriter::supportedFormatExtensions ( RasterFormatOptions  options = SortRecommended)
static

Returns a list of file extensions for supported formats.

The options argument can be used to control the sorting and filtering of returned formats.

See also
supportedFiltersAndFormats()
Since
QGIS 3.0

Definition at line 1206 of file qgsrasterfilewriter.cpp.

◆ tiledMode()

bool QgsRasterFileWriter::tiledMode ( ) const
inline

Returns whether the output will be tiled.

See also
setTiledMode()

Definition at line 171 of file qgsrasterfilewriter.h.

◆ writeRaster() [1/2]

Qgis::RasterFileWriterResult QgsRasterFileWriter::writeRaster ( const QgsRasterPipe pipe,
int  nCols,
int  nRows,
const QgsRectangle outputExtent,
const QgsCoordinateReferenceSystem crs,
const QgsCoordinateTransformContext transformContext,
QgsRasterBlockFeedback feedback = nullptr 
)

Write raster file.

Parameters
piperaster pipe
nColsnumber of output columns
nRowsnumber of output rows (or -1 to automatically calculate row number to have square pixels)
outputExtentextent to output
crscrs to reproject to
transformContextcoordinate transform context
feedbackoptional feedback object for progress reports
Since
QGIS 3.8

Definition at line 85 of file qgsrasterfilewriter.cpp.

◆ writeRaster() [2/2]

Qgis::RasterFileWriterResult QgsRasterFileWriter::writeRaster ( const QgsRasterPipe pipe,
int  nCols,
int  nRows,
const QgsRectangle outputExtent,
const QgsCoordinateReferenceSystem crs,
QgsRasterBlockFeedback feedback = nullptr 
)

Write raster file.

Parameters
piperaster pipe
nColsnumber of output columns
nRowsnumber of output rows (or -1 to automatically calculate row number to have square pixels)
outputExtentextent to output
crscrs to reproject to
feedbackoptional feedback object for progress reports
Deprecated:
since QGIS 3.8, use version with transformContext instead

Definition at line 79 of file qgsrasterfilewriter.cpp.


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