[gdal-dev] gdal_merge

[Clive Swan]

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.rahkonen at maanmittauslaitos.fi>
Sent: Monday, December 5, 2022 11:34:53 AM
To: Clive Swan <cliveswan at gmail.com>; gdal-dev at lists.osgeo.org <gdal-dev at 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-bounces at lists.osgeo.org> Puolesta Clive Swan
Lähetetty: maanantai 5. joulukuuta 2022 12.24
Vastaanottaja: gdal-dev at 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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