Thank you
for the information about trac, I didn't know this software, but it could be
useful!
I tried redoing the calculations without rounding. The results are closer to
the results obtained with r.volume (only tens of meters of difference, instead
of thousands), but they are not the exact
Hi,
Thank you for the clarification on the clumps, it makes more sense for me
now.
However you said :
"Ideally, the clump option of r.volume should be optional. You could file
an enhancement wish on trac for that."
But I don't really understand what you mean by "an enhancement wish on trac
Hello,
Indeed it worked when I changed the name!
Thank you very much!
Marion
De : "Micha
Silver"
A : marion-bru...@sfr.fr,"Markus Neteler" ,"grass-user"
Envoyé: vendredi 13 juillet 2018 13:19
Objet : Re: [GRASS-user] calculate the volume of a DEM with r.volume
body p { margin-bottom: 0cm;
Sorry I
hit send before finishing my email...
De :
marion-bru...@sfr.fr
A : "Helmut Kudrnovsky" ,"grass-user"
Envoyé: vendredi 13 juillet 2018 12:43
Objet : ***SPAM*** Re: [GRASS-user] calculate the volume of a DEM with
r.volume
(sorry for the html emails, hope this one is readable)
I
(sorry for the html emails, hope this one is readable)
I tried with the North Carolina dataset (in GRASS 7.4.0),I had those
results:
r.volume input=elevation@PERMANENT
clump=geology_30m@PERMANENT
Volume report on data from elevation@PERMANENT using clumps on
geology_30m@PERMANENT raster
Hello,
I am working on Windows and I tried using GRASS 7.2.2, GRASS 7.4.0 and GRASS
7.4.1 to see if there is any difference, but it is always the same.
I have a ratser map called dec-juin
First I did
r.clump input=dec-juin@1217_Interpo0618 output=test
to get the clumps
Then I did
r.volume
Thank you
for this clarification, one last question:
the cell size is nsres*ewres right?
De : "Micha
Silver"
A : marion-bru...@sfr.fr
Envoyé: mardi 10 juillet 2018 21:06
Objet : Re: [GRASS-user] calculate the volume of a DEM
body p { margin-bottom: 0cm; margin-top: 0pt; }
On 07/10/2018
Hello,
I tried using r.volume as you suggested. According to the documentation
it is suitable for what I am trying to do.
However, when I use it, I don't have the "Total volume" line at the end of the
report, like it is shown in the documentation. I just have the total volume of
each clump,
Hello,
Hi
Hello again,
I am trying to calculate the volume of a DEM using
GRASS.
A DEM is usually elevation above sea level, so the "volume of a DEM" would be
the the total volume from sea level to the DEM elevation. Is that what you
want? Usually you want the volume between two
Hello,
I am trying to calculate the volume of a DEM using GRASS.
For that I first calculated the area of my DEM using
s.surf.area
.
The result was349
492.7m².
Then I used r.univar to get the number of cells, it is 822 244.
So the cell size is 349 492/822 244 = 0,42m²
To get the volume, I
quot;grass-user"
Envoyé: lundi 2 juillet 2018 23:59
Objet : Re: [GRASS-user] how to use r.mapcalc in GRASS
Hello Marion,
On Mon, Jul 2, 2018 at 12:18 PM, marion-brunet wrote:
Hello,
I am trying to calculate the difference between two raster layers. For
that,
I am using GRASS in QGIS. I use t
Hello,
I am trying to calculate the difference between two raster layers. For that, I
am using GRASS in QGIS. I use the command r.mapcalc. In the field "expression
to evaluate" I wrote
r.mapcalc expression=diff
=TIN_12_17-TIN_06_18
TIN_12_17 and TIN_06_18 are the
names of my two rasters.
I
The
complete traceback is :
Traceback (most recent call last):
File "C:\PROGRA~1\QGIS2~1.18\apps\grass\grass-7.2.2\gui\wx
python\gui_core\prompt.py", line 416, in OnKeyPressed
self._runCmd(self.GetCurLine()[0].strip())
File "C:\PROGRA~1\QGIS2~1.18\apps\grass\grass-7.2.2\gui\wx
Hello,
I have two point clouds of an
open-pit mine taken a few weeks apart. I would like to estimate the volume that
has been excavated during that interval, i.e the difference between the two
point clouds. For that I used CloudCompare to get a new point cloud
corresponding to the distance
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