GDAL
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
VRTRasterBand Class Reference
Inheritance diagram for VRTRasterBand:
GDALRasterBand GDALMajorObject VRTRawRasterBand VRTSourcedRasterBand VRTWarpedRasterBand VRTDerivedRasterBand

Public Member Functions

virtual CPLErr XMLInit (CPLXMLNode *, const char *)
 
virtual CPLXMLNodeSerializeToXML (const char *pszVRTPath)
 
virtual CPLErr SetNoDataValue (double)
 Set the no data value for this band. More...
 
virtual double GetNoDataValue (int *pbSuccess=NULL)
 Fetch the no data value for this band. More...
 
virtual CPLErr SetColorTable (GDALColorTable *)
 Set the raster color table. More...
 
virtual GDALColorTableGetColorTable ()
 Fetch the color table associated with band. More...
 
virtual CPLErr SetColorInterpretation (GDALColorInterp)
 Set color interpretation of a band. More...
 
virtual GDALColorInterp GetColorInterpretation ()
 How should this band be interpreted as color? More...
 
virtual const char * GetUnitType ()
 Return raster unit type. More...
 
CPLErr SetUnitType (const char *)
 Set unit type. More...
 
virtual char ** GetCategoryNames ()
 Fetch the list of category names for this raster. More...
 
virtual CPLErr SetCategoryNames (char **)
 Set the category names for this band. More...
 
virtual CPLErr SetMetadata (char **papszMD, const char *pszDomain="")
 Set metadata. More...
 
virtual CPLErr SetMetadataItem (const char *pszName, const char *pszValue, const char *pszDomain="")
 Set single metadata item. More...
 
virtual double GetOffset (int *pbSuccess=NULL)
 Fetch the raster value offset. More...
 
CPLErr SetOffset (double)
 Set scaling offset. More...
 
virtual double GetScale (int *pbSuccess=NULL)
 Fetch the raster value scale. More...
 
CPLErr SetScale (double)
 Set scaling ratio. More...
 
virtual int GetOverviewCount ()
 Return the number of overview layers available. More...
 
virtual GDALRasterBandGetOverview (int)
 Fetch overview raster band object. More...
 
virtual CPLErr GetHistogram (double dfMin, double dfMax, int nBuckets, int *panHistogram, int bIncludeOutOfRange, int bApproxOK, GDALProgressFunc, void *pProgressData)
 Compute raster histogram. More...
 
virtual CPLErr GetDefaultHistogram (double *pdfMin, double *pdfMax, int *pnBuckets, int **ppanHistogram, int bForce, GDALProgressFunc, void *pProgressData)
 Fetch default raster histogram. More...
 
virtual CPLErr SetDefaultHistogram (double dfMin, double dfMax, int nBuckets, int *panHistogram)
 Set default histogram. More...
 
CPLErr CopyCommonInfoFrom (GDALRasterBand *)
 
virtual void GetFileList (char ***ppapszFileList, int *pnSize, int *pnMaxSize, CPLHashSet *hSetFiles)
 
virtual void SetDescription (const char *)
 Set object description. More...
 
virtual GDALRasterBandGetMaskBand ()
 Return the mask band associated with the band. More...
 
virtual int GetMaskFlags ()
 Return the status flags of the mask band associated with the band. More...
 
virtual CPLErr CreateMaskBand (int nFlags)
 Adds a mask band to the current band. More...
 
void SetMaskBand (VRTRasterBand *poMaskBand)
 
void SetIsMaskBand ()
 
CPLErr UnsetNoDataValue ()
 
virtual int CloseDependentDatasets ()
 
virtual int IsSourcedRasterBand ()
 
- Public Member Functions inherited from GDALRasterBand
 GDALRasterBand ()
 
virtual ~GDALRasterBand ()
 
int GetXSize ()
 Fetch XSize of raster. More...
 
int GetYSize ()
 Fetch YSize of raster. More...
 
int GetBand ()
 Fetch the band number. More...
 
GDALDatasetGetDataset ()
 Fetch the owning dataset handle. More...
 
GDALDataType GetRasterDataType (void)
 Fetch the pixel data type for this band. More...
 
void GetBlockSize (int *, int *)
 Fetch the "natural" block size of this band. More...
 
GDALAccess GetAccess ()
 Find out if we have update permission for this band. More...
 
CPLErr RasterIO (GDALRWFlag, int, int, int, int, void *, int, int, GDALDataType, int, int)
 Read/write a region of image data for this band. More...
 
CPLErr ReadBlock (int, int, void *)
 Read a block of image data efficiently. More...
 
CPLErr WriteBlock (int, int, void *)
 Write a block of image data efficiently. More...
 
GDALRasterBlockGetLockedBlockRef (int nXBlockOff, int nYBlockOff, int bJustInitialize=FALSE)
 Fetch a pointer to an internally cached raster block. More...
 
CPLErr FlushBlock (int=-1, int=-1, int bWriteDirtyBlock=TRUE)
 
unsigned char * GetIndexColorTranslationTo (GDALRasterBand *poReferenceBand, unsigned char *pTranslationTable=NULL, int *pApproximateMatching=NULL)
 Compute translation table for color tables. More...
 
virtual CPLErr FlushCache ()
 Flush raster data cache. More...
 
virtual double GetMinimum (int *pbSuccess=NULL)
 Fetch the minimum value for this band. More...
 
virtual double GetMaximum (int *pbSuccess=NULL)
 Fetch the maximum value for this band. More...
 
virtual CPLErr Fill (double dfRealValue, double dfImaginaryValue=0)
 Fill this band with a constant value. More...
 
virtual CPLErr GetStatistics (int bApproxOK, int bForce, double *pdfMin, double *pdfMax, double *pdfMean, double *padfStdDev)
 Fetch image statistics. More...
 
virtual CPLErr ComputeStatistics (int bApproxOK, double *pdfMin, double *pdfMax, double *pdfMean, double *pdfStdDev, GDALProgressFunc, void *pProgressData)
 Compute image statistics. More...
 
virtual CPLErr SetStatistics (double dfMin, double dfMax, double dfMean, double dfStdDev)
 Set statistics on band. More...
 
virtual CPLErr ComputeRasterMinMax (int, double *)
 Compute the min/max values for a band. More...
 
virtual int HasArbitraryOverviews ()
 Check for arbitrary overviews. More...
 
virtual GDALRasterBandGetRasterSampleOverview (int)
 Fetch best sampling overview. More...
 
virtual CPLErr BuildOverviews (const char *, int, int *, GDALProgressFunc, void *)
 Build raster overview(s) More...
 
virtual CPLErr AdviseRead (int nXOff, int nYOff, int nXSize, int nYSize, int nBufXSize, int nBufYSize, GDALDataType eDT, char **papszOptions)
 Advise driver of upcoming read requests. More...
 
virtual GDALRasterAttributeTableGetDefaultRAT ()
 Fetch default Raster Attribute Table. More...
 
virtual CPLErr SetDefaultRAT (const GDALRasterAttributeTable *)
 Set default Raster Attribute Table. More...
 
virtual CPLVirtualMemGetVirtualMemAuto (GDALRWFlag eRWFlag, int *pnPixelSpace, GIntBig *pnLineSpace, char **papszOptions)
 Create a CPLVirtualMem object from a GDAL raster band object. More...
 
void ReportError (CPLErr eErrClass, int err_no, const char *fmt,...) CPL_PRINT_FUNC_FORMAT(4
 Emits an error related to a raster band. More...
 
- Public Member Functions inherited from GDALMajorObject
int GetMOFlags ()
 
void SetMOFlags (int nFlags)
 
virtual const char * GetDescription () const
 Fetch object description. More...
 
virtual char ** GetMetadataDomainList ()
 Fetch list of metadata domains. More...
 
virtual char ** GetMetadata (const char *pszDomain="")
 Fetch metadata. More...
 
virtual const char * GetMetadataItem (const char *pszName, const char *pszDomain="")
 Fetch single metadata item. More...
 

Protected Member Functions

void Initialize (int nXSize, int nYSize)
 
- Protected Member Functions inherited from GDALRasterBand
void InvalidateMaskBand ()
 
virtual CPLErr IReadBlock (int, int, void *)=0
 
virtual CPLErr IWriteBlock (int, int, void *)
 
virtual CPLErr IRasterIO (GDALRWFlag, int, int, int, int, void *, int, int, GDALDataType, int, int)
 
CPLErr OverviewRasterIO (GDALRWFlag, int, int, int, int, void *, int, int, GDALDataType, int, int)
 
int InitBlockInfo ()
 
CPLErr AdoptBlock (int, int, GDALRasterBlock *)
 
GDALRasterBlockTryGetLockedBlockRef (int nXBlockOff, int nYBlockYOff)
 Try fetching block ref. More...
 
- Protected Member Functions inherited from GDALMajorObject
char ** BuildMetadataDomainList (char **papszList, int bCheckNonEmpty,...) CPL_NULL_TERMINATED
 Helper function for custom implementations of GetMetadataDomainList() More...
 

Protected Attributes

int bIsMaskBand
 
int bNoDataValueSet
 
int bHideNoDataValue
 
double dfNoDataValue
 
GDALColorTablepoColorTable
 
GDALColorInterp eColorInterp
 
char * pszUnitType
 
char ** papszCategoryNames
 
double dfOffset
 
double dfScale
 
CPLXMLNodepsSavedHistograms
 
std::vector< VRTOverviewInfoapoOverviews
 
VRTRasterBandpoMaskBand
 
- Protected Attributes inherited from GDALRasterBand
GDALDatasetpoDS
 
int nBand
 
int nRasterXSize
 
int nRasterYSize
 
GDALDataType eDataType
 
GDALAccess eAccess
 
int nBlockXSize
 
int nBlockYSize
 
int nBlocksPerRow
 
int nBlocksPerColumn
 
int bSubBlockingActive
 
int nSubBlocksPerRow
 
int nSubBlocksPerColumn
 
GDALRasterBlock ** papoBlocks
 
int nBlockReads
 
int bForceCachedIO
 
GDALRasterBandpoMask
 
bool bOwnMask
 
int nMaskFlags
 
- Protected Attributes inherited from GDALMajorObject
int nFlags
 
CPLString sDescription
 
GDALMultiDomainMetadata oMDMD
 

Member Function Documentation

CPLErr VRTRasterBand::CreateMaskBand ( int  nFlags)
virtual

Adds a mask band to the current band.

The default implementation of the CreateMaskBand() method is implemented based on similar rules to the .ovr handling implemented using the GDALDefaultOverviews object. A TIFF file with the extension .msk will be created with the same basename as the original file, and it will have as many bands as the original image (or just one for GMF_PER_DATASET). The mask images will be deflate compressed tiled images with the same block size as the original image if possible.

Note that if you got a mask band with a previous call to GetMaskBand(), it might be invalidated by CreateMaskBand(). So you have to call GetMaskBand() again.

This method is the same as the C function GDALCreateMaskBand().

Since
GDAL 1.5.0
Returns
CE_None on success or CE_Failure on an error.
See also
http://trac.osgeo.org/gdal/wiki/rfc15_nodatabitmask

Reimplemented from GDALRasterBand.

char ** VRTRasterBand::GetCategoryNames ( )
virtual

Fetch the list of category names for this raster.

The return list is a "StringList" in the sense of the CPL functions. That is a NULL terminated array of strings. Raster values without associated names will have an empty string in the returned list. The first entry in the list is for raster values of zero, and so on.

The returned stringlist should not be altered or freed by the application. It may change on the next GDAL call, so please copy it if it is needed for any period of time.

This method is the same as the C function GDALGetRasterCategoryNames().

Returns
list of names, or NULL if none.

Reimplemented from GDALRasterBand.

GDALColorInterp VRTRasterBand::GetColorInterpretation ( )
virtual

How should this band be interpreted as color?

GCI_Undefined is returned when the format doesn't know anything about the color interpretation.

This method is the same as the C function GDALGetRasterColorInterpretation().

Returns
color interpretation value for band.

Reimplemented from GDALRasterBand.

GDALColorTable * VRTRasterBand::GetColorTable ( )
virtual

Fetch the color table associated with band.

If there is no associated color table, the return result is NULL. The returned color table remains owned by the GDALRasterBand, and can't be depended on for long, nor should it ever be modified by the caller.

This method is the same as the C function GDALGetRasterColorTable().

Returns
internal color table, or NULL.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::GetDefaultHistogram ( double *  pdfMin,
double *  pdfMax,
int *  pnBuckets,
int **  ppanHistogram,
int  bForce,
GDALProgressFunc  pfnProgress,
void *  pProgressData 
)
virtual

Fetch default raster histogram.

The default method in GDALRasterBand will compute a default histogram. This method is overriden by derived classes (such as GDALPamRasterBand, VRTDataset, HFADataset...) that may be able to fetch efficiently an already stored histogram.

This method is the same as the C function GDALGetDefaultHistogram().

Parameters
pdfMinpointer to double value that will contain the lower bound of the histogram.
pdfMaxpointer to double value that will contain the upper bound of the histogram.
pnBucketspointer to int value that will contain the number of buckets in *ppanHistogram.
ppanHistogrampointer to array into which the histogram totals are placed. To be freed with VSIFree
bForceTRUE to force the computation. If FALSE and no default histogram is available, the method will return CE_Warning
pfnProgressfunction to report progress to completion.
pProgressDataapplication data to pass to pfnProgress.
Returns
CE_None on success, CE_Failure if something goes wrong, or CE_Warning if no default histogram is available.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::GetHistogram ( double  dfMin,
double  dfMax,
int  nBuckets,
int *  panHistogram,
int  bIncludeOutOfRange,
int  bApproxOK,
GDALProgressFunc  pfnProgress,
void *  pProgressData 
)
virtual

Compute raster histogram.

Note that the bucket size is (dfMax-dfMin) / nBuckets.

For example to compute a simple 256 entry histogram of eight bit data, the following would be suitable. The unusual bounds are to ensure that bucket boundaries don't fall right on integer values causing possible errors due to rounding after scaling.

    int anHistogram[256];
    poBand->GetHistogram( -0.5, 255.5, 256, anHistogram, FALSE, FALSE, 
                          GDALDummyProgress, NULL );

Note that setting bApproxOK will generally result in a subsampling of the file, and will utilize overviews if available. It should generally produce a representative histogram for the data that is suitable for use in generating histogram based luts for instance. Generally bApproxOK is much faster than an exactly computed histogram.

This method is the same as the C function GDALGetRasterHistogram().

Parameters
dfMinthe lower bound of the histogram.
dfMaxthe upper bound of the histogram.
nBucketsthe number of buckets in panHistogram.
panHistogramarray into which the histogram totals are placed.
bIncludeOutOfRangeif TRUE values below the histogram range will mapped into panHistogram[0], and values above will be mapped into panHistogram[nBuckets-1] otherwise out of range values are discarded.
bApproxOKTRUE if an approximate, or incomplete histogram OK.
pfnProgressfunction to report progress to completion.
pProgressDataapplication data to pass to pfnProgress.
Returns
CE_None on success, or CE_Failure if something goes wrong.

Reimplemented from GDALRasterBand.

Reimplemented in VRTSourcedRasterBand.

GDALRasterBand * VRTRasterBand::GetMaskBand ( )
virtual

Return the mask band associated with the band.

The GDALRasterBand class includes a default implementation of GetMaskBand() that returns one of four default implementations :

  • If a corresponding .msk file exists it will be used for the mask band.
  • If the dataset has a NODATA_VALUES metadata item, an instance of the new GDALNoDataValuesMaskBand class will be returned. GetMaskFlags() will return GMF_NODATA | GMF_PER_DATASET.
    Since
    GDAL 1.6.0
  • If the band has a nodata value set, an instance of the new GDALNodataMaskRasterBand class will be returned. GetMaskFlags() will return GMF_NODATA.
  • If there is no nodata value, but the dataset has an alpha band that seems to apply to this band (specific rules yet to be determined) and that is of type GDT_Byte then that alpha band will be returned, and the flags GMF_PER_DATASET and GMF_ALPHA will be returned in the flags.
  • If neither of the above apply, an instance of the new GDALAllValidRasterBand class will be returned that has 255 values for all pixels. The null flags will return GMF_ALL_VALID.

Note that the GetMaskBand() should always return a GDALRasterBand mask, even if it is only an all 255 mask with the flags indicating GMF_ALL_VALID.

This method is the same as the C function GDALGetMaskBand().

Returns
a valid mask band.
Since
GDAL 1.5.0
See also
http://trac.osgeo.org/gdal/wiki/rfc15_nodatabitmask

Reimplemented from GDALRasterBand.

int VRTRasterBand::GetMaskFlags ( )
virtual

Return the status flags of the mask band associated with the band.

The GetMaskFlags() method returns an bitwise OR-ed set of status flags with the following available definitions that may be extended in the future:

  • GMF_ALL_VALID(0x01): There are no invalid pixels, all mask values will be 255. When used this will normally be the only flag set.
  • GMF_PER_DATASET(0x02): The mask band is shared between all bands on the dataset.
  • GMF_ALPHA(0x04): The mask band is actually an alpha band and may have values other than 0 and 255.
  • GMF_NODATA(0x08): Indicates the mask is actually being generated from nodata values. (mutually exclusive of GMF_ALPHA)

The GDALRasterBand class includes a default implementation of GetMaskBand() that returns one of four default implementations :

  • If a corresponding .msk file exists it will be used for the mask band.
  • If the dataset has a NODATA_VALUES metadata item, an instance of the new GDALNoDataValuesMaskBand class will be returned. GetMaskFlags() will return GMF_NODATA | GMF_PER_DATASET.
    Since
    GDAL 1.6.0
  • If the band has a nodata value set, an instance of the new GDALNodataMaskRasterBand class will be returned. GetMaskFlags() will return GMF_NODATA.
  • If there is no nodata value, but the dataset has an alpha band that seems to apply to this band (specific rules yet to be determined) and that is of type GDT_Byte then that alpha band will be returned, and the flags GMF_PER_DATASET and GMF_ALPHA will be returned in the flags.
  • If neither of the above apply, an instance of the new GDALAllValidRasterBand class will be returned that has 255 values for all pixels. The null flags will return GMF_ALL_VALID.

This method is the same as the C function GDALGetMaskFlags().

Since
GDAL 1.5.0
Returns
a valid mask band.
See also
http://trac.osgeo.org/gdal/wiki/rfc15_nodatabitmask

Reimplemented from GDALRasterBand.

double VRTRasterBand::GetNoDataValue ( int *  pbSuccess = NULL)
virtual

Fetch the no data value for this band.

If there is no out of data value, an out of range value will generally be returned. The no data value for a band is generally a special marker value used to mark pixels that are not valid data. Such pixels should generally not be displayed, nor contribute to analysis operations.

This method is the same as the C function GDALGetRasterNoDataValue().

Parameters
pbSuccesspointer to a boolean to use to indicate if a value is actually associated with this layer. May be NULL (default).
Returns
the nodata value for this band.

Reimplemented from GDALRasterBand.

double VRTRasterBand::GetOffset ( int *  pbSuccess = NULL)
virtual

Fetch the raster value offset.

This value (in combination with the GetScale() value) is used to transform raw pixel values into the units returned by GetUnits(). For example this might be used to store elevations in GUInt16 bands with a precision of 0.1, and starting from -100.

Units value = (raw value * scale) + offset

For file formats that don't know this intrinsically a value of zero is returned.

This method is the same as the C function GDALGetRasterOffset().

Parameters
pbSuccesspointer to a boolean to use to indicate if the returned value is meaningful or not. May be NULL (default).
Returns
the raster offset.

Reimplemented from GDALRasterBand.

GDALRasterBand * VRTRasterBand::GetOverview ( int  i)
virtual

Fetch overview raster band object.

This method is the same as the C function GDALGetOverview().

Parameters
ioverview index between 0 and GetOverviewCount()-1.
Returns
overview GDALRasterBand.

Reimplemented from GDALRasterBand.

Reimplemented in VRTWarpedRasterBand.

int VRTRasterBand::GetOverviewCount ( )
virtual

Return the number of overview layers available.

This method is the same as the C function GDALGetOverviewCount().

Returns
overview count, zero if none.

Reimplemented from GDALRasterBand.

Reimplemented in VRTWarpedRasterBand.

double VRTRasterBand::GetScale ( int *  pbSuccess = NULL)
virtual

Fetch the raster value scale.

This value (in combination with the GetOffset() value) is used to transform raw pixel values into the units returned by GetUnits(). For example this might be used to store elevations in GUInt16 bands with a precision of 0.1, and starting from -100.

Units value = (raw value * scale) + offset

For file formats that don't know this intrinsically a value of one is returned.

This method is the same as the C function GDALGetRasterScale().

Parameters
pbSuccesspointer to a boolean to use to indicate if the returned value is meaningful or not. May be NULL (default).
Returns
the raster scale.

Reimplemented from GDALRasterBand.

const char * VRTRasterBand::GetUnitType ( )
virtual

Return raster unit type.

Return a name for the units of this raster's values. For instance, it might be "m" for an elevation model in meters, or "ft" for feet. If no units are available, a value of "" will be returned. The returned string should not be modified, nor freed by the calling application.

This method is the same as the C function GDALGetRasterUnitType().

Returns
unit name string.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetCategoryNames ( char **  )
virtual

Set the category names for this band.

See the GetCategoryNames() method for more on the interpretation of category names.

This method is the same as the C function GDALSetRasterCategoryNames().

Parameters
papszNamesthe NULL terminated StringList of category names. May be NULL to just clear the existing list.
Returns
CE_None on success of CE_Failure on failure. If unsupported by the driver CE_Failure is returned, but no error message is reported.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetColorInterpretation ( GDALColorInterp  eColorInterp)
virtual

Set color interpretation of a band.

This method is the same as the C function GDALSetRasterColorInterpretation().

Parameters
eColorInterpthe new color interpretation to apply to this band.
Returns
CE_None on success or CE_Failure if method is unsupported by format.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetColorTable ( GDALColorTable poCT)
virtual

Set the raster color table.

The driver will make a copy of all desired data in the colortable. It remains owned by the caller after the call.

This method is the same as the C function GDALSetRasterColorTable().

Parameters
poCTthe color table to apply. This may be NULL to clear the color table (where supported).
Returns
CE_None on success, or CE_Failure on failure. If the action is unsupported by the driver, a value of CE_Failure is returned, but no error is issued.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetDefaultHistogram ( double  dfMin,
double  dfMax,
int  nBuckets,
int *  panHistogram 
)
virtual

Set default histogram.

This method is the same as the C function GDALSetDefaultHistogram().

Reimplemented from GDALRasterBand.

void VRTRasterBand::SetDescription ( const char *  pszNewDesc)
virtual

Set object description.

The semantics of the description are specific to the derived type. For GDALDatasets it is the dataset name. For GDALRasterBands it is actually a description (if supported) or "".

Normally application code should not set the "description" for GDALDatasets. It is handled internally.

This method is the same as the C function GDALSetDescription().

Reimplemented from GDALMajorObject.

CPLErr VRTRasterBand::SetMetadata ( char **  papszMetadataIn,
const char *  pszDomain = "" 
)
virtual

Set metadata.

The C function GDALSetMetadata() does the same thing as this method.

Parameters
papszMetadataInthe metadata in name=value string list format to apply.
pszDomainthe domain of interest. Use "" or NULL for the default domain.
Returns
CE_None on success, CE_Failure on failure and CE_Warning if the metadata has been accepted, but is likely not maintained persistently by the underlying object between sessions.

Reimplemented from GDALMajorObject.

Reimplemented in VRTSourcedRasterBand.

CPLErr VRTRasterBand::SetMetadataItem ( const char *  pszName,
const char *  pszValue,
const char *  pszDomain = "" 
)
virtual

Set single metadata item.

The C function GDALSetMetadataItem() does the same thing as this method.

Parameters
pszNamethe key for the metadata item to fetch.
pszValuethe value to assign to the key.
pszDomainthe domain to set within, use NULL for the default domain.
Returns
CE_None on success, or an error code on failure.

Reimplemented from GDALMajorObject.

Reimplemented in VRTSourcedRasterBand.

CPLErr VRTRasterBand::SetNoDataValue ( double  )
virtual

Set the no data value for this band.

To clear the nodata value, just set it with an "out of range" value. Complex band no data values must have an imagery component of zero.

This method is the same as the C function GDALSetRasterNoDataValue().

Parameters
dfNoDatathe value to set.
Returns
CE_None on success, or CE_Failure on failure. If unsupported by the driver, CE_Failure is returned by no error message will have been emitted.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetOffset ( double  )
virtual

Set scaling offset.

Very few formats implement this method. When not implemented it will issue a CPLE_NotSupported error and return CE_Failure.

This method is the same as the C function GDALSetRasterOffset().

Parameters
dfNewOffsetthe new offset.
Returns
CE_None or success or CE_Failure on failure.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetScale ( double  )
virtual

Set scaling ratio.

Very few formats implement this method. When not implemented it will issue a CPLE_NotSupported error and return CE_Failure.

This method is the same as the C function GDALSetRasterScale().

Parameters
dfNewScalethe new scale.
Returns
CE_None or success or CE_Failure on failure.

Reimplemented from GDALRasterBand.

CPLErr VRTRasterBand::SetUnitType ( const char *  )
virtual

Set unit type.

Set the unit type for a raster band. Values should be one of "" (the default indicating it is unknown), "m" indicating meters, or "ft" indicating feet, though other nonstandard values are allowed.

This method is the same as the C function GDALSetRasterUnitType().

Parameters
pszNewValuethe new unit type value.
Returns
CE_None on success or CE_Failure if not succuessful, or unsupported.

Reimplemented from GDALRasterBand.


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

Generated for GDAL by doxygen 1.8.11.