[gdal-dev] What is the maximum '-wm' I can use with 64bit gdalwarp?

[Even Rouault]

Le vendredi 26 décembre 2014 07:03:41, Simen Langseth a écrit :
> Dear Even Rouault
> 
> Whether I use '-multi' or not, '-wm 1024' works, but '-wm 3024' does not
> work in my PC.

You don't give enough details so that we can understand what "does not work". 
See http://lists.osgeo.org/pipermail/gdal-dev/2014-December/040706.html as an 
example how to do a good report.

In theory, specifying big values of -wm can :
- fail if the process cannot allocate the memory
- or increase speed
- or decrease speed
- or have no impact

It shouldn't alter the result, ideally. But there are complex situations where 
bigger chunks cause coordinate transformations to be more problematic for the 
warper, as the bug I mentionned in my previous message.

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