You may need to specify the pixel size with the -ps argument to be the
one with the less resolution.
Or try using gdalwarp instead (you may also need to use the -tr argument
to specify the resolution). gdal_merge cannot deal with rasters larger
than memory.
Le 05/12/2022 à 12:46, Clive Swan a écrit :
Hi,
The raster one is the world, the second is the UK.
The UK fits within the first raster...
We want to update UK data in raster one.
Regards,
Clive
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------------------------------------------------------------------------
*From:* Rahkonen Jukka <jukka.rahko...@maanmittauslaitos.fi>
*Sent:* Monday, December 5, 2022 11:34:53 AM
*To:* Clive Swan <clives...@gmail.com>; gdal-dev@lists.osgeo.org
<gdal-dev@lists.osgeo.org>
*Subject:* Re: [gdal-dev] gdal_merge
Hi,
Maybe your rasters are far apart. Gdal_merge creates a raster with so
large extent that all the source images fit within it. Even empty
pixels take space.
-Jukka Rahkonen-
*Lähettäjä:* gdal-dev <gdal-dev-boun...@lists.osgeo.org> *Puolesta
*Clive Swan
*Lähetetty:* maanantai 5. joulukuuta 2022 12.24
*Vastaanottaja:* gdal-dev@lists.osgeo.org
*Aihe:* [gdal-dev] gdal_merge
Hi Even,
Thanks
the –configuration sorted out that issue.
CPL_VSIL_USE_TEMP_FILE_FOR_RANDOM_WRITE is a configuration option /
environment variable, so you have to pass it with --config
CPL_VSIL_USE_TEMP_FILE_FOR_RANDOM_WRITE YES
Now I am getting a memory issue?? << The input files are 6.9 GB + 672 MB
The output should be 7.xx GB
6.9 GB + 672MB
numpy.core._exceptions._ArrayMemoryError: Unable to allocate 377. GiB
for an array with shape (225000, 450000) and data type float32
Any suggestions appreciated
Kind regards,
Clive
--
Regards,
Clive Swan
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