[gdal-dev] Python create BigTIFF image

[Even Rouault]

Ah ok that explains it then. The heuristics in the Create() method only 
takes into account the full resolution image, not potential overviews 
you might add. So you have to go with the explict option = 
['BIGTIFF=YES'] argument I suggested


Le 20/04/2021 à 21:37, ni hao a écrit :
> Even,
>
> Thank you for your reply.
> You are right: ds = gdal.GetDriverByName('GTiff').Create( ) is under 4GB.
> It was the next command pushes GTiff over 4GB:
>   ds.BuildOverviews('AVERAGE_MAGPHASE', [2,4,8,16])
>
> Is there a way to specify BIGTIFF in ds.BuildOverviews() ?
>
> ------------------------------------------------------------------------
> *From:* Even Rouault <even.rouault at spatialys.com>
> *Sent:* April 20, 2021 3:56 PM
> *To:* ni hao <ni_hao88 at hotmail.com>; gdal-dev at lists.osgeo.org 
> <gdal-dev at lists.osgeo.org>
> *Subject:* Re: [gdal-dev] Python create BigTIFF image
>
>
> Le 20/04/2021 à 20:53, ni hao a écrit :
>> Hi list,
>>
>> I use Python to create GeoTiff image, and I get the error because it 
>> exceeds 4GB.
>> ds = gdal.GetDriverByName('GTiff').Create(output_magnitude, xsize, 
>> ysize, 1, gdal.GDT_Float32)
>>
>>    ERROR 1: TIFFReadDirectory:Failed to read directory at offset 
>> 4294957836
>>    ERROR 1: TIFFWriteDirectoryTagData:Maximum TIFF file size 
>> exceeded. Use BIGTIFF=YES creation option.
>>
>> I need to turn on *BIGTIFF=YES*
>> https://gdal.org/drivers/raster/gtiff.html 
>> <https://gdal.org/drivers/raster/gtiff.html>
>>
>> But I don't do know how. I tried:
>> ds = gdal.GetDriverByName('GTiff').Create(output_magnitude, xsize, 
>> ysize, 1, gdal.GDT_Float32, BIGTIFF=YES)
>
> ds = gdal.GetDriverByName('GTiff').Create(output_magnitude, xsize, 
> ysize, 1, gdal.GDT_Float32, options=['BIGTIFF=YES'])
>
> But as you didn't specify compression, it should have done that 
> automatically. Can you indicate the exact values of xsize and ysize 
> you use ?
>
>
>> but it didn't work.
>>
>>
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