Hi, On Sat, Jan 17, 2015 at 7:00 PM, Jeshua Lacock <[email protected]> wrote:
> > Greetings, > > In the event my experience working with rather large GRASS rasters may be > useful, I thought I would share it. The following notes were compiled > running the GRASS 7.0.0beta4-141230 package on Mac OS X 10.10.1. The > system is a 6-core Xeon with 32GB of RAM, running in full 64-bit mode. > > 1. Using an r.external virtual mosaic as the input proved impossible > trying to run r.resample on it on trying to produce a nearly teracell > raster (I ended up breaking sub-tiles). I closely followed the instructions > on the Wiki. > > 2. On smaller sub-tiles of said image, r.resample was insanely slow even > with the external imagery. At first I thought it was a limitation of being > overwhelmed with small sector requests and purchased a terabyte SSD, copied > the external imagery to the SSD, but that didn’t noticeably help. > Throughput was way less than 1mb/sec. > > 3. g.remove is unusable for long lists. Actually applies to I think any > utility that takes a list for input. I wish I could just put it to a file > so it could parse it line by line (As I understand the issue it is a > limitation of the insanely long shell arguments). > maybe silly question regarding g.remove, have you used the pattern option instead of the name option? Best, Anna > If anyone wants me to elaborate on anything, or has pointers how to do > things better - please let me know! > > > Cheers, > > Jeshua Lacock > Founder/Engineer > 3DTOPO Incorporated > <http://3DTOPO.com> > Phone: 208.462.4171 > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user
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