[GRASS-dev] r.proj.seg disk space usage problem
hamish_nospam at yahoo.com
Wed Mar 7 02:18:53 CET 2007
William Kyngesburye wrote:
> I had a chance today to try a VERY large raster with r.proj.seg.
> 2.7GB raster, 55000x47000 cells. The memory issue of r.proj have now
> been moved to a HD space issue. With 7.75GB free, it chokes at about
> 75% in the allocating memory stage, while free space slowly drops to
> zero, with an "Error writing segment file".
> It seems r.proj.seg, for its segmentation, creates an uncompressed
> copy of the whole raster on the HD (instead of in memory). I'm
> guessing this has something to do with random access speed in rasters?
> So I'm back to projecting pieces of the raster, but now so they fit
> in my disk free space, and patching them together. Disappointing,
> but if that's the way it must be, I can live with it.
did you pump the memory= option up to a few hundred MB smaller than your
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