[gdal-dev] Cannot set simple geotransform

[Jon Morris]

That's great to know, thanks both. Really must get on with that upgrade to GDAL 3...

Thanks,

Jon

-----Original Message-----
From: gdal-dev <gdal-dev-bounces at lists.osgeo.org> On Behalf Of Even Rouault
Sent: 05 February 2020 18:31
To: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Cannot set simple geotransform

> It's a known bug. There is some analysis at
> https://github.com/mapbox/rasterio/issues/524#issuecomment-156655258.

Actually, is a *past* known bug, at least for the GTiff driver

From GDAL 2.3.0 news:
 * make it accept to write SetGeoTransform([0,1,0,0,0,1]) as a ModelTransformationTag, and remove particular cases with the [0,1,0,0,0,1] geotransform (#1683)

This fix also fixes (0,1,0,0,0,-1)

>>> from osgeo import gdal
ds=gdal.GetDriverByName('GTiff').Create('/tmp/test.tif',5,5,1,gdal.GDT_Byte)
>>> ds=gdal.GetDriverByName('GTiff').Create('/tmp/test.tif',
5,5,1,gdal.GDT_Byte)
>>> ds.GetGeoTransform()
(0.0, 1.0, 0.0, 0.0, 0.0, 1.0)
>>> ds.SetGeoTransform((0,1,0,0,0,-1))
0
>>> del ds
>>> ds=gdal.OpenEx('/tmp/test.tif',gdal.GA_Update)
>>> ds.GetGeoTransform()
(0.0, 1.0, 0.0, 0.0, 0.0, -1.0)
>>>


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