gsdview.gdalbackend.gdalsupport

Support tools and classes for the GDAL library.

Functions

GDALTypeCodeToNumericTypeCode(gdal_code)
available_ovr_levels(band)
best_ovr_index(band[, ovrlevel, policy])	Return the best available overview index for the ovrlevel desired.
centralcoor(dataset_fname)
check_tiff_bug()
checkmapper(mapper)
compute_ovr_level(band[, ovrsize])	Compute the overview factor that fits the ovrsize request.
coordinate_mapper(dataset[, precise])
datums_dict()	Return a dict of most significant datums in proj.4 format
default_env_var(var_name)
formatErrorMsg([errno, etypecode, msg])
gdalFilters([readwrite])	Return a list useful in file filters for gdal
gdalOvLevelAdjust(ovrlevel, xsize)	Adjust the overview level
gdal_datatypes()
gdal_informats()	Build dictionary with all input extensions supported by GDAL
gdal_outformats()	Build dictionary with all output extensions supported by GDAL
getDriverList()
getutmzone(cenlon)	Return utm zone.
has_complex_bands(dataset)
iscomplex(band)
isinsouth(cenlat)	Return ‘True’ if latitude correspond to south hemisphere, ‘False’
issubdataset(fname)
projections_dict()	Return a dict of most significant projections in proj.4 format
quotefilename(fname)	Add double quotes only at the begin and end of filename, supporting
splitsubdataset(fullname)	Split a subdataset in 3 parts: driver, filename, subdataset.
uniqueDatasetID(prod)

Exceptions

GdalOpenError(*args)
MissingOvrError(ovrlevel)

exception gsdview.gdalbackend.gdalsupport.GdalOpenError(*args)

exception gsdview.gdalbackend.gdalsupport.MissingOvrError(ovrlevel)

gsdview.gdalbackend.gdalsupport.available_ovr_levels(band)

gsdview.gdalbackend.gdalsupport.best_ovr_index(band, ovrlevel=None, policy='NEAREST')

Return the best available overview index for the ovrlevel desired.

Policy values can be:

• NEAREST –> index of the nearest overview level

• GREATER –> index of the nearest overview level greater or equal

  to “ovrlevel”

• SMALLER –> index of the nearest overview level smaller or equal

  to “ovrlevel”

gsdview.gdalbackend.gdalsupport.centralcoor(dataset_fname)

gsdview.gdalbackend.gdalsupport.check_tiff_bug()

gsdview.gdalbackend.gdalsupport.checkmapper(mapper)

gsdview.gdalbackend.gdalsupport.compute_ovr_level(band, ovrsize=102400)

Compute the overview factor that fits the ovrsize request.

gsdview.gdalbackend.gdalsupport.coordinate_mapper(dataset, precise=False)

gsdview.gdalbackend.gdalsupport.datums_dict()

Return a dict of most significant datums in proj.4 format

gsdview.gdalbackend.gdalsupport.default_env_var(var_name)

gsdview.gdalbackend.gdalsupport.formatErrorMsg(errno=None, etypecode=None, msg=None)

gsdview.gdalbackend.gdalsupport.gdalFilters(readwrite=False)

Return a list useful in file filters for gdal

Parameters :

• ‘readwrite’: a flag indicated if only RW supported files are handled

gsdview.gdalbackend.gdalsupport.gdalOvLevelAdjust(ovrlevel, xsize)

Adjust the overview level

Replicate the GDALOvLevelAdjust function from gdal-1.4.4/gcore/gdaldefaultoverviews.cpp

gsdview.gdalbackend.gdalsupport.gdal_datatypes()

gsdview.gdalbackend.gdalsupport.gdal_informats()

Build dictionary with all input extensions supported by GDAL

gsdview.gdalbackend.gdalsupport.gdal_outformats()

Build dictionary with all output extensions supported by GDAL

gsdview.gdalbackend.gdalsupport.getDriverList()

gsdview.gdalbackend.gdalsupport.getutmzone(cenlon)

Return utm zone.

Return utm zone corresponding to longitude, None if zone calculated was incorrect.

gsdview.gdalbackend.gdalsupport.has_complex_bands(dataset)

gsdview.gdalbackend.gdalsupport.iscomplex(band)

gsdview.gdalbackend.gdalsupport.isinsouth(cenlat)

Return ‘True’ if latitude correspond to south hemisphere, ‘False’ elsewhere.

gsdview.gdalbackend.gdalsupport.issubdataset(fname)

gsdview.gdalbackend.gdalsupport.projections_dict()

Return a dict of most significant projections in proj.4 format

gsdview.gdalbackend.gdalsupport.quotefilename(fname)

Add double quotes only at the begin and end of filename, supporting input in “driver:filename://subdatasets” form too

gsdview.gdalbackend.gdalsupport.splitsubdataset(fullname)

Split a subdataset in 3 parts: driver, filename, subdataset.

If filename is in “driver:filename://subdatasets” form split it in 3 parts, else return input without any modifications.

gsdview.gdalbackend.gdalsupport.uniqueDatasetID(prod)