Hi Antonello,
I would first make a field for the area in the vector attribute table with
v.db.addcol, then compute the area of each vector with v.to.db and store it
in the attribute table. Then I'd convert the vectors to rasters using the
parameter use=attr and tell GRASS to use the area column
Hello
In my experience, the problem lies in defining the upper and lower limits of
the 3D region (see
http://osgeo-org.1560.n6.nabble.com/3D-geological-volume-modeling-raster-3D-is-it-really-possible-td4980148.html
3D geological volume modeling (raster 3D): is it really possible ? )
with bad
Hi,
there is also r.convergence add-on:
http://grass.osgeo.org/wiki/GRASS_AddOns#r.convergence
Regards,
madi
On Tue, Jun 12, 2012 at 4:24 AM, Michael Barton michael.bar...@asu.eduwrote:
Invert the DEM by multiplying all values by -1 and adding the maximum
original height value. This makes
Hi,
I doing species distribution modeling in R using the package
'dismo'[1]. The predict() function produces a output raster file
with the prediction of the species distribution. The file which is created
is a grd file + a gri file.
What is the Format i need to set when I want to import this
On Tue, Jun 12, 2012 at 11:28 AM, Margherita Di Leo direg...@gmail.com wrote:
Hi,
there is also r.convergence add-on:
http://grass.osgeo.org/wiki/GRASS_AddOns#r.convergence
BTW, the topographic convergence index is also available in
r.watershed in GRASS 7.
Markus M
Regards,
madi
On
Hi,
I am experimenting with the GRASS graphical modeller in GRASS 7.0 and I
am wondering where / how to set the 'overwrite' flag in e.g. the r.mask
function.
There does not seem to be an option to set this flag and adding
'--overwrite' to the command line under the 'item' tab does not seem
Hi,
I am experimenting with the GRASS graphical modeller in GRASS 7.0 (on
Ubuntu 12.04). I would like to create a mask in a loop, whereby the
input 'maskcats' is dynamic. I.e., I would like to do something similar
to the script below:
for i in { 1 .. 5 }
do
r.mask input=inputmap
On Tue, Jun 12, 2012 at 11:41 AM, Johannes Radinger jradin...@gmx.at wrote:
Hi,
I doing species distribution modeling in R using the package
'dismo'[1]. The predict() function produces a output raster file
with the prediction of the species distribution. The file which is created
is a grd
Thank you, this actually worked.
As I actually wanted the value in meters what I did was to create a very
hi-res grid with 20 meter resolution and then assign the value 400 in the
rasterisation of the vector, to finally resample.
A direct rasterisation of the vector using the area column as
On Tue, Jun 12, 2012 at 5:23 AM, Glynn Clements
gl...@gclements.plus.com wrote:
Daniel Lee wrote:
ERROR: G_malloc: unable to allocate 18446744071974792324 bytes at gsds.c:575
18446744071974792324 = 0x9899ac84
Does anybody know what could be the problem? If I'm interpreting the
All:
I have a grass64 svn installation on Ubuntu 10.04 that I have been
having not problems with for a while. I have been updating the
installation in the same way as I have been in a while. I have written
into the script to automatically install the r.stream* modules. I have
recently,
Hi Stephen,
On Tue, Jun 12, 2012 at 3:17 PM, Stephen Sefick sas0...@auburn.edu wrote:
All:
I have a grass64 svn installation on Ubuntu 10.04 that I have been having
not problems with for a while. I have been updating the installation in
the same way as I have been in a while. I have
On Tue 12 Jun 2012 08:22:54 AM CDT, Margherita Di Leo wrote:
Hi Stephen,
On Tue, Jun 12, 2012 at 3:17 PM, Stephen Sefick sas0...@auburn.edu
mailto:sas0...@auburn.edu wrote:
All:
I have a grass64 svn installation on Ubuntu 10.04 that I have been
having not problems with for a
There are four different maps/tables of water monitoring sites, each from
a different source. To consolidate them into a single map/table I need to
export all attributes. v.out.ascii exports the category number, easting, and
northing, but not the other two columns (site ID and type). Is there
db.out.ogr ?
http://grass.osgeo.org/grass64/manuals/html64_user/db.out.ogr.html
-
best regards
Helmut
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View this message in context:
http://osgeo-org.1560.n6.nabble.com/Export-All-Vector-Map-Attributes-tp4980880p4980889.html
Sent from the Grass - Users mailing list archive at Nabble.com.
On Tue, 12 Jun 2012, Helmut Kudrnovsky wrote:
db.out.ogr ?
Helmut,
Yep. That'll work. I did overlook this one.
Thanks,
Rich
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Thomas,
Again, you'd have to look to see if this can give you the results you need.
The word ridge is a qualitative term that refers to a general landform
category. For your purposes, how high does a landform need to be to qualify as
a ridge: 1m, 10m, 100m, 1000m? Similarly, how long does it
I will do so. Thanks.
Michael
On Jun 12, 2012, at 10:46 AM, Luca Delucchi wrote:
2012/6/6 Markus Neteler nete...@osgeo.org:
We have developed it and will put it shortly into Addons.
I just commit i.histo.match on grass7 addons please test it.
Markus
--
ciao
Luca
Thanks, Markus and Martin! Now v.strahler is installed under 6.4.* and
works fine.
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Hello everyone,
I've been trying to compute some viewsheds using the r.viewshed module
(available in http://grass.osgeo.org/wiki/GRASS_AddOns), but it's taking to
long to finish.
I ran this module on a 5000x5000 (95mb) raster grid and it took 3min 17sec to
finish. I have seen some articles
Two tables: 'sites' contains the ID and geographic coordinates;
'waterchem' contains the ID and water chemistry data. The latter table is a
sub-set of the former.
I want to display only those sites for which chemistry data are available.
In postgres I write,
SELECT DISTINCT(w.site)
On Tue, Jun 12, 2012 at 9:52 PM, Chaulio Ferreira chau...@hotmail.com wrote:
Hello everyone,
I've been trying to compute some viewsheds using the r.viewshed module
(available in http://grass.osgeo.org/wiki/GRASS_AddOns), but it's taking to
long to finish.
I ran this module on a 5000x5000
Markus M,
Thanks for answering. I'll try to use the default 500mb. But I still think
these differences in the times are too big. I am not using a big map (just
95mb, it would fit 5 times in the RAM memory) and a rather regular PC. On this
email
Hi Michael,
Are you sure you should use the -mo flag? Because it looks like that
flag is for setting metadata to the output.
Since gdal considers each time step in a NetCDF dataset a band, have
you tried using the -b switch, for selecting the band you are
interested in?
Cheers
Daniel
On Tue,
Thanks Daniel,
It is not clear to me how the -mo flag works. You may be right, but it also
sounded like you could use it to subset the data. I can use -b of course, but
this only takes numbers. I'm dealing with NetCDF files that can have hundreds
or thousands of bands. So querying the metadata
Michael wrote:
I'm working with reading NetCDF files. gdal does an
admirable job of this.
Many of the NetCDF climate data files have many bands and I'd
like import only some of them. Specifying a particular NetCDF
SUBSET will allow gdal to read the data for a particular
variable.
fyi, see
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