gdalextras.gxba

Generate a new dataset from a source dataset using FIR Filters.

This tool uses the vrtlib to create a kernel filtered source and “gdal_translate” to built the destination dataset according to the parameters set by the user.

The tool perform the following operations:

• temporary vrt dataset creation[default: the entire image is processed]
• output format conversion [default: the entire image is processed]
• output image resizing (optional)

Almost all parameters are configurable and have defaults suitable for common tasks.

Functions

add_inSection_option(parser)	It defines the input specific options
add_outSection_option(parser)	It defines the output specific options
add_specSection_option(parser)	It defines the tool specific options
check_inopts(options)	It validates the input options
check_outopts(options)	It checks the output options
check_specopts(options)	It checks the output options
check_tool_args(args, parser)	check the correct number of compulsory command line fields
choose_method(option, opt_str, value, parser)	It checks if a selection method is present.
convert_in_off(coors)	It converts from (xmi,ymin,xmax,ymax) in (xoff,yoff,xsize,ysize)
default_transftype(in_dtype, out_dtype, pixfun)	Compute the most appropriate transfer data type for the output image.
fixDerivedRasterband(tree, pixfunc[, rbInd, ...])	It puts in the correct format the derived rasterband in the xml structure.
gdal_outformats()	Build dictionary with all drivers supported by GDAL
handle_cmdline()	Handle command line arguments and options
issubdataset_(fname)
main()	Main function for FIR filtered generation.
parse_tree(source[, parser])
process(options, args, tmpfileobj)
translate(options, args, tmpfileobj)
translatecmd(options, src, dst, pixfun)	Generate the command line for “gdal_translate” execution.

Classes

OptionGroup(parser, title[, description])
OptionParser([usage, option_list, ...])	Class attributes:

Exceptions

OptionValueError(msg)

Raised if an invalid option value is encountered on the command

gdalextras.gxba.add_inSection_option(parser)

It defines the input specific options

gdalextras.gxba.add_outSection_option(parser)

It defines the output specific options

gdalextras.gxba.add_specSection_option(parser)

It defines the tool specific options

gdalextras.gxba.check_inopts(options)

It validates the input options

gdalextras.gxba.check_outopts(options)

It checks the output options

gdalextras.gxba.check_specopts(options)

It checks the output options

gdalextras.gxba.check_tool_args(args, parser)

check the correct number of compulsory command line fields

3 for FIR filters : * pixel function * input filename * output filename

gdalextras.gxba.choose_method(option, opt_str, value, parser)

It checks if a selection method is present. If it isn’t present, set the correct attribute

gdalextras.gxba.convert_in_off(coors)

It converts from (xmi,ymin,xmax,ymax) in (xoff,yoff,xsize,ysize)

gdalextras.gxba.default_transftype(in_dtype, out_dtype, pixfun)

Compute the most appropriate transfer data type for the output image.

Parameters :

• in_datatype: int

  a gdal data type for input

• out_datatype: int

  a gdal data type for output

• pixfun: str

Return :

• transfer_dtype: str

  a gdal data type for internal virtual file operations

PIXFUN IN DTYPE OUT DTYPE -> TRANSFER DTYPE any T1 T2 _default_outdtype(T1) any <C>T1 T2 <C>_default_outdtype(T1) any T1 <C>T2 <C>_default_outdtype(T1) any <C>T1 <C>T2 <C>_default_outdtype(T1)

gdalextras.gxba.gdal_outformats()

Build dictionary with all drivers supported by GDAL

gdalextras.gxba.handle_cmdline()

Handle command line arguments and options

gdalextras.gxba.issubdataset_(fname)

gdalextras.gxba.main()

Main function for FIR filtered generation.

Uses “sys.argv” for getting inputs.

gdalextras.gxba.process(options, args, tmpfileobj)

gdalextras.gxba.translate(options, args, tmpfileobj)

gdalextras.gxba.translatecmd(options, src, dst, pixfun)

Generate the command line for “gdal_translate” execution.

The command line in returned in form of list of strings.