Hi,
On Thu, Nov 19, 2015 at 3:16 AM, Pietro <[email protected]> wrote: > Hi Anna, > > soory for the delay... > > On Mon, Nov 16, 2015 at 3:23 PM, Anna Petrášová <[email protected]> > wrote: > > On Mon, Nov 16, 2015 at 8:28 AM, Markus Neteler <[email protected]> > wrote: > >> On Tue, Nov 10, 2015 at 7:58 PM, Anna Petrášová <[email protected]> > >> wrote: > >> > Maybe some bug in the pygrass raster library? > >> > >> Looks like a race condition? > > > > > > I don't understand why would that happen, the patching done with pygrass > > raster library is not running in parallel. > > Yes I have to investigate more on this to understand what it is not > working... > > > > A workaround I currently use is to patch the rasters using r.patch, > which is > > in the case of viewsheds OK (the overlaps are the same), however in other > > cases such as interpolation, the overlaps are different and r.patch won't > > patch the rasters as desired, that's why the GridModule is using pygrass > > raster library I assume. > > I've modified r.tile to split and merge using an optional parameter > for the overlap (perhaps I should create just a new module r.untile > instead of adding a new flag in r.tile...). > The approach it is much faster than the actual implementation of > r.patch because minimize reading disk operations since we are not > merging general raster maps with undefined bboxes but well known > tiles... > Unfortunately the implementation still experimental and has some > problems. I will not able to work on this before next year... maybe I > can put the modified version of r.tile in the sandbox repo. That would be great addition, I think I would keep it in r.tile, r.untile sounds a little weird. I don't think I would have time to look at it either, but please put it in sandbox, so that it's somewhere. I am also having problem that sometimes I am getting RuntimeError "Execution of subprocesses was not successful" it appears randomly, once or twice in 100 runs, but it causes quite a bit of trouble. On Windows I was getting this in half of the cases (but with different data and use case so it's difficult to compare). I think the GridModule is great and makes parallelization so much easier, so I would love to see it working more reliably. It's clear to me that you don't have time to look at it now, neither do I, so I am mainly reporting these issues... Thank you! > > Let me know. > > Pietro >
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