Inheritance diagram for Geo::GDAL:

Classes
class	Band
class	ColorTable
class	Const
class	Dataset
class	Driver
class	GCP
class	MajorObject
class	RasterAttributeTable
Public Functions
list	ReadDir (scalar dir)
list	Stat (scalar filename)
scalar	VersionInfo (scalar request= 'VERSION_NUM')
	PushFinderLocation (scalar path)
	PopFinderLocation ()
	FinderClean ()
scalar	FindFile (scalar class, scalar basename)
	Search for GDAL support files.
	SetConfigOption (scalar key, scalar value)
scalar	GetConfigOption (scalar key, scalar default)
listref	GCPsToGeoTransform (listref GCPs, scalar ApproxOK=1)
scalar	GetCacheMax ()
	SetCacheMax (scalar Bytes)
scalar	GetCacheUsed ()
scalar	GetDataTypeSize (scalar GDALDataType)
list	DataTypeValueRange (scalar DataType)
scalar	DataTypeIsComplex (scalar GDALDataType)
scalar	DecToDMS (scalar angle, scalar axis, scalar precision=2)
scalar	PackedDMSToDec (scalar packed)
scalar	DecToPackedDMS (scalar dec)
scalar	NodeType (scalar type)
listref	ParseXMLString (scalar XML)
list	NodeData (scalar node)
list	Children (scalar node)
list	Child (scalar node, scalar i)
scalar	SerializeXMLTree (listref XMLTree)
list	Drivers ()
scalar	GetDriverCount ()
Geo::GDAL::Driver	Driver (scalar driver)
Geo::GDAL::Driver	GetDriverByName (scalar ShortName)
Geo::GDAL::Driver	IdentifyDriver (scalar name, scalar siblings)
	ComputeMedianCutPCT (scalar red, scalar green, scalar blue, scalar num_colors, scalar colors, scalar callback, scalar callback_data)
	Compute an "optimal" color table for a three band image.
	DitherRGB2PCT (scalar red, scalar green, scalar blue, scalar target, scalar colors, scalar callback, scalar callback_data)
	Dither a three band image into one band using a color table.
	ReprojectImage (scalar src_ds, scalar dst_ds, scalar src_wkt=undef, scalar dst_wkt=undef, scalar ResampleAlg='NearestNeighbour', scalar WarpMemoryLimit=0, scalar maxerror=0.0, scalar callback, scalar callback_data)
Geo::GDAL::Dataset	AutoCreateWarpedVRT (Geo::GDAL::Dataset src, scalar src_wkt=undef, scalar dst_wkt=undef, scalar ResampleAlg='NearestNeighbour', scalar maxerror=0.0)
	ComputeProximity (Geo::GDAL::Band src, Geo::GDAL::Band proximity, hashref options, scalar callback, scalar callback_data)
	RasterizeLayer (Geo::GDAL::Dataset ds, listref bands, Geo::OGR::Layer layer, scalar transformer, scalar arg, listref burn_values, hashref options, scalar callback, scalar callback_data)
	Polygonize (Geo::GDAL::Band src, Geo::GDAL::Band mask, Geo::OGR::Layer out, scalar PixValField, hashref options, scalar callback, scalar callback_data)
	SieveFilter (Geo::GDAL::Band src, Geo::GDAL::Band mask, Geo::GDAL::Band dst, scalar threshold, scalar connectedness, hashref options, scalar callback, scalar callback_data)
	RegenerateOverviews (Geo::GDAL::Band src, listref overviews, scalar resampling, scalar callback, scalar callback_data)
	RegenerateOverview (Geo::GDAL::Band src, Geo::GDAL::Band overview, scalar resampling, scalar callback, scalar callback_data)
listref	GeneralCmdLineProcessor (listref argv, scalar options=0)
scalar	PackCharacter (scalar DataType)
Geo::GDAL::Dataset	Open (scalar name, scalar access='ReadOnly')
Geo::GDAL::Dataset	OpenShared (scalar name, scalar access='ReadOnly')
scalar	GetDataTypeName (scalar GDALDataType)
scalar	GetDataTypeByName (scalar GDALDataType)
scalar	GetColorInterpretationName (scalar ColorInterpretation)
scalar	GetPaletteInterpretationName (scalar PaletteInterpretation)

Member Function Documentation

Geo::GDAL::Dataset Geo::GDAL::AutoCreateWarpedVRT	(	Geo::GDAL::Dataset	src,
		scalar	src_wkt = `undef`,
		scalar	dst_wkt = `undef`,
		scalar	ResampleAlg = `'NearestNeighbour'`,
		scalar	maxerror = `0.0`
	)

Parameters:

src
src_wkt	A WKT string.
dst_wkt	A WKT string.
ResampleAlg	one of 'NearestNeighbour', 'Bilinear', 'Cubic', or 'CubicSpline'.
maxerror

Returns:: a new Geo::GDAL::Dataset object

Documentation for GDAL warper

list Geo::GDAL::Child	(	scalar	node,
		scalar	i
	)

Parameters:

node
i	0 .. number of children - 1

Returns:

list Geo::GDAL::Children ( scalar node )

Parameters:

node

Returns:

Geo::GDAL::ComputeMedianCutPCT	(	scalar	red,
		scalar	green,
		scalar	blue,
		scalar	num_colors,
		scalar	colors,
		scalar	callback,
		scalar	callback_data
	)

Compute an "optimal" color table for a three band image.

Parameters:

red	a Geo::GDAL::Band object
green	a Geo::GDAL::Band object
blue	a Geo::GDAL::Band object
num_colors	the desired number of colors
colors	an empty Geo::GDAL::ColorTable object
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

Geo::GDAL::ComputeProximity	(	Geo::GDAL::Band	src,
		Geo::GDAL::Band	proximity,
		hashref	options,
		scalar	callback,
		scalar	callback_data
	)

Parameters:

src	The raster from which the proximities are computed from.
proximity	The raster to which the proximities are computed to.
options	Options. Supported key, value pairs are VALUES => n[,n]* A list of target pixel values to measure the distance from. If this option is not provided proximity will be computed from non-zero pixel values. Currently pixel values are internally processed as integers. DISTUNITS => PIXEL\|GEO Indicates whether distances will be computed in pixel units or in georeferenced units. The default is pixel units. This also determines the interpretation of MAXDIST. MAXDIST => n The maximum distance to search. Proximity distances greater than this value will not be computed. Instead output pixels will be set to a nodata value. NODATA => n The NODATA value to use on the output band for pixels that are beyond MAXDIST. If not provided, the hProximityBand will be queried for a nodata value. If one is not found, 65535 will be used. FIXED_BUF_VAL => n If this option is set, all pixels within the MAXDIST threadhold are set to this fixed value instead of to a proximity distance.
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

scalar Geo::GDAL::DataTypeIsComplex ( scalar GDALDataType )

Parameters:

GDALDataType An integer (one of keys of Geo::GDAL::TYPE_INT2STRING).

Returns:: true if the data type is a complex number.

list Geo::GDAL::DataTypeValueRange ( scalar DataType )

Parameters:

DataType Data type as string (one of Byte UInt16 Int16 UInt32 Int32 Float32 Float64 CInt16 CInt32 CFloat32 CFloat64).

Returns:: the minimum, maximum range of the data type.

scalar Geo::GDAL::DecToDMS	(	scalar	angle,
		scalar	axis,
		scalar	precision = `2`
	)

Convert decimal degrees to degrees, minutes, and seconds string

Parameters:

angle	A number
axis	A string specifying latitude or longitude ('Long').
precision

Returns:: a string nndnn'nn.nn'"L where n is a number and L is either N or E

scalar Geo::GDAL::DecToPackedDMS ( scalar dec )

Parameters:

dec	Decimal degrees

Returns:: packed DMS, i.e., a number DDDMMMSSS.SS

Geo::GDAL::DitherRGB2PCT	(	scalar	red,
		scalar	green,
		scalar	blue,
		scalar	target,
		scalar	colors,
		scalar	callback,
		scalar	callback_data
	)

Dither a three band image into one band using a color table.

Parameters:

red	a Geo::GDAL::Band object
green	a Geo::GDAL::Band object
blue	a Geo::GDAL::Band object
target	a Geo::GDAL::Band object
colors	a Geo::GDAL::ColorTable object
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

Geo::GDAL::Driver Geo::GDAL::Driver ( scalar driver )

Create a driver object for the internal GDAL driver.

Note:: aka GetDriver

Parameters:

driver The name or number of the driver.

Returns:: a new Geo::GDAL::Driver object

list Geo::GDAL::Drivers ( )

An example:

use Geo::GDAL;
for my $driver (Geo::GDAL::Drivers) {
   print $driver->{ShortName},"\n";
}

Prints short names of all available GDAL raster drivers.

Returns:: all GDAL raster driver objects in a list.

Geo::GDAL::FinderClean ( )

Clear the set of support file search paths.

scalar Geo::GDAL::FindFile	(	scalar	class,
		scalar	basename
	)

Search for GDAL support files.

An example:

use Geo::GDAL;
$a = Geo::GDAL::FindFile('gdal', 'pcs.csv');
print STDERR "$a\n";

Prints (for example):

c:\msys\1.0\local\share\gdal\pcs.csv

Parameters:

class	The class of files to search for. For example 'gdal'.
basename	The basename of the file to search for. For example 'pcs.csv'.

Returns:: the path to the searched file or undef.

listref Geo::GDAL::GCPsToGeoTransform	(	listref	GCPs,
		scalar	ApproxOK = `1`
	)

Compute transformation coefficients from a set of Geo::GDAL::GCP objects The geo transformation has the form

x = a + column * b + row * c
y = d + column * e + row * f

where
(column,row) is the location in pixel coordinates
(x,y) is the location in projection coordinates

Parameters:

GCPs	A set of Geo::GDAL::GCP objects.
ApproxOK	Minimize the error in the coefficient.

Returns:: [$a, $b, $c, $d, $e, $f]

listref Geo::GDAL::GeneralCmdLineProcessor	(	listref	argv,
		scalar	options = `0`
	)

Parameters:

argv
options	integer

Returns:: arrayref

scalar Geo::GDAL::GetCacheMax ( )

Returns:: maximum amount of memory (as bytes) for caching within GDAL.

scalar Geo::GDAL::GetCacheUsed ( )

Returns:: the amount of memory currently used for caching within GDAL.

scalar Geo::GDAL::GetColorInterpretationName ( scalar ColorInterpretation )

Deprecated:: use string names

Parameters:

ColorInterpretation

Returns:

scalar Geo::GDAL::GetConfigOption	(	scalar	key,
		scalar	default
	)

Parameters:

key	A GDAL config option.
default	A default value for the option.

Returns:: the value of the GDAL config option or the value of the default parameter.

scalar Geo::GDAL::GetDataTypeByName ( scalar GDALDataType )

Deprecated:: use string names

Parameters:

GDALDataType

Returns:

scalar Geo::GDAL::GetDataTypeName ( scalar GDALDataType )

Deprecated:: use string names

Parameters:

GDALDataType

Returns:

scalar Geo::GDAL::GetDataTypeSize ( scalar GDALDataType )

Parameters:

GDALDataType An integer (one of keys of Geo::GDAL::TYPE_INT2STRING).

Returns:: the size as the number of bits.

Geo::GDAL::Driver Geo::GDAL::GetDriverByName ( scalar ShortName )

Parameters:

ShortName A short name of the driver.

Returns:: a new Geo::GDAL::Driver object

scalar Geo::GDAL::GetDriverCount ( )

Returns:: the number of available GDAL raster drivers.

scalar Geo::GDAL::GetPaletteInterpretationName ( scalar PaletteInterpretation )

Deprecated:: use string names

Parameters:

PaletteInterpretation

Returns:

Geo::GDAL::Driver Geo::GDAL::IdentifyDriver	(	scalar	name,
		scalar	siblings
	)

Parameters:

name	A dataset path.
siblings	[optional] A list of names of files in the directory specified by name.

Returns:: a new Geo::GDAL::Driver object

list Geo::GDAL::NodeData ( scalar node )

Parameters:

node

Returns:: ($NodeType, $value)

scalar Geo::GDAL::NodeType ( scalar type )

Convert between integer and string expressions of CPLXMLNodeTypes

Parameters:

type

Returns:: type

Geo::GDAL::Dataset Geo::GDAL::Open	(	scalar	name,
		scalar	access = `'ReadOnly'`
	)

An example

use Geo::GDAL;
$ds = Geo::GDAL::Open('existing.tiff', 'Update');

Parameters:

name
access	either 'ReadOnly' or 'Update'

Returns:: a new Geo::GDAL::Dataset object

Reimplemented in Geo::GDAL::Dataset.

Geo::GDAL::Dataset Geo::GDAL::OpenShared	(	scalar	name,
		scalar	access = `'ReadOnly'`
	)

Parameters:

name
access	either 'ReadOnly' or 'Update'

Returns:: a new Geo::GDAL::Dataset object

Reimplemented in Geo::GDAL::Dataset.

scalar Geo::GDAL::PackCharacter ( scalar DataType )

Get the character that is needed for Perl's pack and unpack when they are used with Geo::GDAL::Band::ReadRaster and Geo::GDAL::Band::WriteRaster. Note that Geo::GDAL::Band::ReadTile and Geo::GDAL::Band::WriteTile have simpler interfaces that do not require pack and unpack.

Parameters:

DataType GDAL data type value, typically from $band->{DataType}

Returns:: character which can be used in Perl's pack and unpack

scalar Geo::GDAL::PackedDMSToDec ( scalar packed )

Parameters:

packed DMS as a number DDDMMMSSS.SS

Returns:: decimal degrees

listref Geo::GDAL::ParseXMLString ( scalar XML )

Parses a given XML into an array of arrays and returns a reference to that. An array in the structure is: (CPLXMLNodeType, value, child, child, ...). CPLXMLNodeType is an integer.

Parameters:

XML

Returns:: an XMLTree

Geo::GDAL::Polygonize	(	Geo::GDAL::Band	src,
		Geo::GDAL::Band	mask,
		Geo::OGR::Layer	out,
		scalar	PixValField,
		hashref	options,
		scalar	callback,
		scalar	callback_data
	)

Parameters:

src
mask	All pixels in the mask band with a value other than zero will be considered suitable for collection as polygons. Must be undef if not used.
out
PixValField	The index (or name) of the field in output layer into which the pixel value of the polygon should be written.
options	Not used.
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

Geo::GDAL::PopFinderLocation ( )

Remove the latest addition from the set of support file search paths.

Geo::GDAL::PushFinderLocation ( scalar path )

Add a path to the set of paths from where GDAL support files are sought.

Geo::GDAL::RasterizeLayer	(	Geo::GDAL::Dataset	ds,
		listref	bands,
		Geo::OGR::Layer	layer,
		scalar	transformer,
		scalar	arg,
		listref	burn_values,
		hashref	options,
		scalar	callback,
		scalar	callback_data
	)

Parameters:

ds
bands	A reference to a list of bands to be updated.
layer
transformer	Not supported, must be undef.
arg	Transformer argument, must be undef.
burn_values	Values to be used for burning the geometries. One for each layer.
options	Not used.
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

list Geo::GDAL::ReadDir ( scalar dir )

Returns:: Contents of the directory.

Geo::GDAL::RegenerateOverview	(	Geo::GDAL::Band	src,
		Geo::GDAL::Band	overview,
		scalar	resampling,
		scalar	callback,
		scalar	callback_data
	)

Parameters:

src
overview
resampling	'NEAREST', 'AVERAGE', or 'GAUSS'
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Geo::GDAL::RegenerateOverviews	(	Geo::GDAL::Band	src,
		listref	overviews,
		scalar	resampling,
		scalar	callback,
		scalar	callback_data
	)

Todo:: This is not yet available

Parameters:

src
overviews	A list of Geo::GDAL::Band's for the overviews.
resampling	'NEAREST', 'AVERAGE', or 'GAUSS'
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Geo::GDAL::ReprojectImage	(	scalar	src_ds,
		scalar	dst_ds,
		scalar	src_wkt = `undef`,
		scalar	dst_wkt = `undef`,
		scalar	ResampleAlg = `'NearestNeighbour'`,
		scalar	WarpMemoryLimit = `0`,
		scalar	maxerror = `0.0`,
		scalar	callback,
		scalar	callback_data
	)

Parameters:

src_ds	Source dataset.
dst_ds	Destination dataset.
src_wkt	Source projection as a WKT.
dst_wkt	Destination projection as a WKT.
ResampleAlg	One of NearestNeighbour Bilinear Cubic or CubicSpline.
WarpMemoryLimit	The amount of memory allowed for caching. Default is 0, i.e., no limit.
maxerror	Maximum error measured in input pixels that is allowed in approximating the transformation. Default is 0.0, i.e., exact calculations.
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data). Reprojection is terminated if the progress function returns 0.
callback_data	[optional]

Documentation for GDAL warper

scalar Geo::GDAL::SerializeXMLTree ( listref XMLTree )

Parameters:

XMLTree

Returns:: XML

Geo::GDAL::SetCacheMax ( scalar Bytes )

Parameters:

Bytes New maximum amount of memory for caching within GDAL.

Geo::GDAL::SetConfigOption	(	scalar	key,
		scalar	value
	)

Parameters:

key A GDAL config option. Possible values include 'GDAL_FORCE_CACHING', 'USE_RRD', GDAL_DATA', 'GDAL_SKIP', 'GDAL_DRIVER_PATH', 'GDAL_IGNORE_AXIS_ORIENTATION', 'GMLJP2OVERRIDE', 'GDAL_DISABLE_READDIR_ON_OPEN', 'GDAL_PAM_ENABLED', 'GDAL_PAM_MODE', 'GDAL_PAM_PROXY_DIR', 'GDAL_MAX_DATASET_POOL_SIZE', 'GDAL_FORCE_CACHING', 'GDAL_CACHEMAX', 'GDAL_SWATH_SIZE', 'PROJSO', 'CENTER_LONG', 'OGR_DEBUG_ORGANIZE_POLYGONS', and 'OGR_ORGANIZE_POLYGONS'. Consult the GDAL main documentation for the semantics of config options.

value A value for the option, typically 'YES', 'NO', undef, a path, or a filename.

Geo::GDAL::SieveFilter	(	Geo::GDAL::Band	src,
		Geo::GDAL::Band	mask,
		Geo::GDAL::Band	dst,
		scalar	threshold,
		scalar	connectedness,
		hashref	options,
		scalar	callback,
		scalar	callback_data
	)

Removes small raster polygons.

Parameters:

src
mask
dst
threshold	An integer.
connectedness	4 or 8
options	Not used.
callback	[optional] a reference to a subroutine, which will be called with parameters (number progress, string msg, callback_data)
callback_data	[optional]

Documentation for GDAL algorithms

list Geo::GDAL::Stat ( scalar filename )

Returns:: ($filemode, $filesize). filemode is f for a plain file, d for a directory, l for a symbolic link, p for a named pipe (FIFO), S for a socket, b for a block special file, and c for a character special file.

scalar Geo::GDAL::VersionInfo ( scalar request = 'VERSION_NUM' )

Parameters:

request A string specifying the request. Currently either "VERSION_NUM", "RELEASE_DATE", "RELEASE_NAME", or "--version". Default is "VERSION_NUM".

Returns:: Requested information.

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

lib/Geo/GDAL.pm

Geo::GDAL Class Reference

Classes

Public Functions

Member Function Documentation