Hi Markus,
That is what was missing in stream-network analyzes!
Great to have this! I didnt have a deeper look yet, but I will test and
probably enjoy the script (in fast C-code).
Thank you for that!
Achim
Markus Metz schrieb:
> Hi all,
>
> in grass-addons is a new module for clean stream ne
Markus Metz pisze:
Hi all,
in grass-addons is a new module for clean stream network extraction
from flow accumulation. It can extract streams from accumulation maps
generated with any method (D8, FD8, D-Inf, DEMON, etc) and any
software, granted that exactly the same elevation map is provided
Hi all,
I have a problem reclassing a vector of polygons:
I have areas with unique cats and a column "value" as integer.
I want to reclass from column "value"
and ->here is the problem:
keep the value information to identify the areas.
In the manual it says:
No table is created for reclassed lay
> PS:
> workaround would be:
> v.to.rast with old values
> update centros of reclassed map from that raster map
> -> but it seems a bit in-elegant..
...and which is a bit complicated as centroids cannot be used in
v.what.rast...
...and conversion into points produces more than one point for some
ce
Jarosław Jasiewicz wrote:
rest of r.stream* modules including new r.stream.stats for Hortonian
statistics are now available by grass addons page and by grass add-ons
svn repository. I actually move tutorial on r.stream* to grass wiki page.
Great, IMHO the tutorials on your website are very he
Markus Metz pisze:
Jarosław Jasiewicz wrote:
rest of r.stream* modules including new r.stream.stats for Hortonian
statistics are now available by grass addons page and by grass
add-ons svn repository. I actually move tutorial on r.stream* to
grass wiki page.
Great, IMHO the tutorials on you
Well, I really stuck here:
I havent found anything about playing with the common geom multipolygon
in GRASS. I think that is what I need and what I thought I could handle
with v.reclass. But it does not work.
-Is there something in GRASS to create multipolygons?
-Do they have one centroid or mult
Hi,
I am trying to find out if 2 raster layers are exactly identical. I am
not an experienced mapcalc user, so I am wondering, where the 3200204
NULL values come from, in Test1. The result in Test2 is what I expected.
My obviously wrong understanding was that I wouldn't need the special
oper
Hi -
I have a script that I am running on the Windows version of GRASS 6.4.0
installed using OSGEO4W. The script seems to run okay but the I am
getting a message that I can't figure out.
Early in the script I have the command:
r.mask -r maskcats=*
I also tried: r.mask -r MASK
In both cases
Does anyone know when the new release of Cygwin (for Windows) will come
out?
Thanks.
Lubica
__
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Hi Ned,
On Wed, Sep 23, 2009 at 7:50 PM, Ned Horning wrote:
> Hi -
>
> I have a script that I am running on the Windows version of GRASS 6.4.0
> installed using OSGEO4W. The script seems to run okay but the I am getting a
> message that I can't figure out.
>
> Early in the script I have the comma
Markus,
I ran the script in the lower pane of the Output - GIS.m window. I
expect this is a stupid question but in the Windows version where is the
GRASS terminal?
Ned
Markus Neteler wrote:
just a curiosity: are you sure to run this script in the GRASS
terminal?
Markus
___
Hermann wrote:
> I am trying to find out if 2 raster layers are exactly
> identical.
I usually do
g.region rast=map1,map2
r.univar map1
r.univar map2
and make sure the output is the same.
another way is
r.mapcalc "diffmap = map1 - map2"
r.univar diffmap
see also wish #618
https://trac.osge
> r.univar based comparison:
What if there was a small geometric shift between the 2 maps. Would I
notice if both maps have enough NULLs around the edges?
> r.mapcalc "diffmap = map1 - map2"
How would I separate NULL,NULL cases from cases where one map has a
value, but the other has NULL?
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