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Hello<br>
<br>
<div class="moz-cite-prefix">On 11/16/2017 11:51 PM, Giuseppe
Amatulli wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAKoiDH+SYxuGxAWU+t0b0vS5pBZk37FZdTt+uj1cptmFiCkz1A@mail.gmail.com">
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<div>Hi Markus M.</div>
<div><br>
</div>
<div>I was testing the r.stream.extract for 2 tiff </div>
<div><br>
</div>
<div>1) 80040 x 72870 = 5,832,514,800 i got the stream results -
no error </div>
<div><br>
</div>
<div>2) 80490 x 142690 = 11,485,118,100 i got the following
error </div>
<div><br>
</div>
<div>
<div>A* Search...</div>
<div>0..2../var/spool/slurmd/job6514787/slurm_script: line 80:
28925 Bus error r.stream.extract elevation=elv
accumulation=upa threshold=0.5 depression=dep direction=dir
stream_raster=stream memory=45000 --o --verbose</div>
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<br>
I think it was already mentioned in this thread: the threshold=0.5
is certainly wrong. The threshold value is *number of pixels* for
minimum basin size. Usually it would be in the thousands. With your
region size of 11 billion you probably want a threshold of tens of
thousands.<br>
<br>
<blockquote type="cite"
cite="mid:CAKoiDH+SYxuGxAWU+t0b0vS5pBZk37FZdTt+uj1cptmFiCkz1A@mail.gmail.com">
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<div>Do you think that is something with the slurm ram
limitation or is something with the r.extract.stream? </div>
<div>If the the stream output have a number of stream segments
larger than 2,147,483,647 what is happen? </div>
<div>Do I get an error or all the value larger than
2,147,483,647 are just rounded to 2,147,483,647 ? </div>
<div><br>
</div>
<div><br>
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<div>Moreover, if use the stream obtain from option 1) and I use
the stream as input for the r.stream.basins </div>
<div>I got the following error</div>
<div><br>
</div>
<div>
<div>reading raster map <stream>...</div>
<div>0..3..6..9..12..15..18..21..24..27..30..33..36..39..42..45../var/spool/slurmd/job6514788/slurm_script:
line 82: 17687 Bus error
/gpfs/home/fas/sbsc/ga254/.grass7/addons/bin/r.stream.basins
-l stream_rast=stream direction=dir</div>
</div>
<div><br>
</div>
<div>is this something that need to be fixed in r.stream.basins,
or should i think that is due to other problems </div>
<div><br>
</div>
<div>Thank you </div>
<div>Giuseppe </div>
<div><br>
</div>
<div><br>
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<div><br>
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</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 10 November 2017 at 11:21, Markus
Neteler <span dir="ltr"><<a
href="mailto:neteler@osgeo.org" target="_blank"
moz-do-not-send="true">neteler@osgeo.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><span
class="">On Wed, Nov 1, 2017 at 10:12 PM, Markus Metz<br>
<<a href="mailto:markus.metz.giswork@gmail.com"
moz-do-not-send="true">markus.metz.giswork@gmail.com</a><wbr>>
wrote:<br>
> On Wed, Nov 1, 2017 at 7:15 PM, Giuseppe Amatulli<br>
> <<a href="mailto:giuseppe.amatulli@gmail.com"
moz-do-not-send="true">giuseppe.amatulli@gmail.com</a>>
wrote:<br>
>><br>
>> Thanks Markus!!<br>
>> I will test and I will let you know how it works.<br>
><br>
> Your feedback is very helpful!<br>
>><br>
>> I have few more questions<br>
>> 1) now how much is the upper limit matrix cell
number that<br>
>> r.stream.extract can handle?<br>
><br>
> About 1.15e+18 cells.<br>
><br>
> Another limitation is the number of detected stream
segments. This must not<br>
> be larger than 2,147,483,647 streams,<br>
</span>...<br>
<br>
(Added as a note to<br>
<a
href="https://grasswiki.osgeo.org/wiki/GRASS_GIS_Performance#Some_benchmarks"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://grasswiki.osgeo.org/<wbr>wiki/GRASS_GIS_Performance#<wbr>Some_benchmarks</a><br>
)<br>
<br>
best,<br>
markusN<br>
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-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">
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<div>Giuseppe Amatulli,
Ph.D.<br>
<br>
Research scientist at<br>
<span>Yale School of
Forestry &
Environmental
Studies<br>
</span><span>Yale
Center for Research
Computing<br>
</span>Center for
Science and Social
Science Information<br>
New Haven, 06511<br>
<div> Teaching: <a
href="http://spatial-ecology.net"
target="_blank"
moz-do-not-send="true">http://spatial-ecology.net</a></div>
Work: <a
href="https://environment.yale.edu/profile/giuseppe-amatulli/"
target="_blank"
moz-do-not-send="true">https://environment.yale.edu/profile/giuseppe-amatulli/</a>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918</pre>
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