Ooops... I neglected the signed check.
from osgeo import gdal
class GdalDataType(object):
def __init__(self, nbits, Float, Signed=True, Complex=False):
for i in range(0,gdal.GDT_TypeCount):
self.DataType=None
DataType=i
DataTypeName=gdal.GetDataTypeName(i)
DataTypeSize=gdal.GetDataTypeSize(i)
DataTypeIsFloat ='Float' in DataTypeName
DataTypeIsSigned = DataTypeIsFloat or DataTypeName[0:4] in
['Byte','UInt']
DataTypeIsComplex=gdal.DataTypeIsComplex(i)==1
if DataTypeSize==nbits and DataTypeIsFloat==Float and
DataTypeIsSigned==Signed and DataTypeIsComplex==Complex:
self.DataType=DataType
self.DataTypeName=DataTypeName
self.DataTypeSize=DataTypeSize
self.DataTypeIsFloat=DataTypeIsFloat
self.DataTypeIsSigned=DataTypeIsSigned
self.DataTypeIsComplex=DataTypeIsComplex
if DataTypeIsSigned:
self.DataTypeRange=[-2**(nbits-1),2**(nbits-1)]
else:
self.DataTypeRange=[0,2**nbits-1]
break
if self.DataType is None: raise TypeError, 'No matching DataType
found'
gdt=GdalDataType(nbits=32, Float=True, Complex=False)
print gdt.DataTypeName
-----Original Message-----
From: Pinner, Luke
Sent: Thursday, 29 October 2009 10:21 AM
To: 'Luca Fasano';
[hidden email]
Subject: RE: [gdal-dev] GDAL DataType class
You could easily roll your own.
from osgeo import gdal
class GdalDataType(object):
def __init__(self, nbits, Float, Complex=False, Signed=False):
for i in range(0,gdal.GDT_TypeCount):
self.DataType=None
DataType=i
DataTypeName=gdal.GetDataTypeName(i)
DataTypeSize=gdal.GetDataTypeSize(i)
DataTypeIsFloat ='Float' in DataTypeName
DataTypeIsComplex=gdal.DataTypeIsComplex(i)==1
if DataTypeSize==nbits and DataTypeIsFloat==Float and
DataTypeIsComplex==Complex:
self.DataType=DataType
self.DataTypeName=DataTypeName
self.DataTypeSize=DataTypeSize
self.DataTypeIsFloat=DataTypeIsFloat
self.DataTypeIsComplex=DataTypeIsComplex
break
if self.DataType is None: raise TypeError, 'No matching DataType
found'
gdt=GdalDataType(nbits=32, Float=True, Complex=False)
print gdt.DataTypeName
Luke
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]] On Behalf Of Luca Fasano
Sent: Thursday, 29 October 2009 3:19 AM
To:
[hidden email]
Subject: [gdal-dev] GDAL DataType class
Hi all,
I need a way to retrieve a GDAL DataType (its code or its string name,
it's the same) starting from all information on it. Does it exist a
class or method to to this?
For example:
GdalDataType(nbits=32, float=True, Complex=True) -> gdal.GDT_CFloat32
I use Python bindings for GDAL.
I'd like to avoid building the string manually (i.e.
'GDT_'+'C'+'Float'+'32')
Thanks
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