[GRASS-user] 25 yr celebration

GRASS GRASS user
1

Another logo for the 25 yr celebration of Grass Gis

http://grass.osgeo.org/wiki/File:Grass_logo_gold_text_25yr_celebration.png

Have 25yr happy anniversary.

Javier García.

Windows Live Hotmail: Your friends can get your Facebook updates, right from Hotmail®.

2

Hi,

is there a way in GRASS to build an accumulation map from a directions
map without a dem map?

Best regards,
Achim

3

2009/11/18 javier Garcia Prieto <fjgarciaprieto@hotmail.com>:

Another logo for the 25 yr celebration of Grass Gis

http://grass.osgeo.org/wiki/File:Grass_logo_gold_text_25yr_celebration.png

Have 25yr happy anniversary.

Cool, just try to keep

http://grass.osgeo.org/wiki/GRASS_Art_Gallery

up-to-date (ie. add this file to the gallery). Otherwise it can be lost.

Martin

--
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa

4

25 year is a long time.
I have been working with GRASS for 5 years and I still haven’t found nothing you can’t do with GRASS.

Thank you very much for the developers and users who help.

Pablo Torres Carreira
Brazil

Making a LOT of thematic maps for ambiental purposes.

Date: Wed, 18 Nov 2009 17:48:32 +0100
Subject: Re: [GRASS-user] 25 yr celebration
From: landa.martin@gmail.com
To: fjgarciaprieto@hotmail.com
CC: grass-user@lists.osgeo.org

2009/11/18 javier Garcia Prieto fjgarciaprieto@hotmail.com:

Another logo for the 25 yr celebration of Grass Gis

http://grass.osgeo.org/wiki/File:Grass_logo_gold_text_25yr_celebration.png

Have 25yr happy anniversary.

Cool, just try to keep

http://grass.osgeo.org/wiki/GRASS_Art_Gallery

up-to-date (ie. add this file to the gallery). Otherwise it can be lost.

Martin

–
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa

grass-user mailing list
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Chegou o Windows 7: Incrivelmente simples! Clique e conheça.

5

Hello again,

I am still searching a method to generate a flow accumulation map from a
flow direction map.

I got the direction map from an arcgis user. In arcgis the module
"FLOWACCUMULATION(FLOW_DIR)" would do this, but I want to use an open
source solution.

If anyone could give me a hint, where I could find a tool like this
(inside GRASS it does not seem to be possible), I would be very grateful.

Best regards,
Achim

6

Achim Kisseler pisze:

Hello again,

I am still searching a method to generate a flow accumulation map from a
flow direction map.

I got the direction map from an arcgis user. In arcgis the module
"FLOWACCUMULATION(FLOW_DIR)" would do this, but I want to use an open
source solution.

If anyone could give me a hint, where I could find a tool like this
(inside GRASS it does not seem to be possible), I would be very grateful.

Best regards,
Achim
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grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
  

there shoud be no problem if you have oryginal DEM

7

Thanks, Jaroslaw for response,

there shoud be no problem if you have oryginal DEM

I know, but I do NOT have the DEM. Thats the problem.

Achim

Jarosław Jasiewicz schrieb:

Achim Kisseler pisze:

Hello again,

I am still searching a method to generate a flow accumulation map from a
flow direction map.

I got the direction map from an arcgis user. In arcgis the module
"FLOWACCUMULATION(FLOW_DIR)" would do this, but I want to use an open
source solution.

If anyone could give me a hint, where I could find a tool like this
(inside GRASS it does not seem to be possible), I would be very grateful.

Best regards,
Achim
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
  

8

Hi Achim,
if you are trying to use an open source GIS for hydrological applications consider to take a look at JGrass. There are a lot of geomorphological modules.

Best regards

Silvia

Hello again,

I am still searching a method to generate a flow accumulation map from a
flow direction map.

I got the direction map from an arcgis user. In arcgis the module
"FLOWACCUMULATION(FLOW_DIR)" would do this, but I want to use an open
source solution.

If anyone could give me a hint, where I could find a tool like this
(inside GRASS it does not seem to be possible), I would be very grateful.

Best regards,
Achim
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

9

Hi Silvia,

thank you very much. I will use h.tca from JGRASS to get the desired.

Best,
Achim

Silvia Franceschi schrieb:

Hi Achim,
if you are trying to use an open source GIS for hydrological
applications consider to take a look at JGrass. There are a lot of
geomorphological modules.

Best regards

Silvia

Hello again,

I am still searching a method to generate a flow accumulation map from a
flow direction map.

I got the direction map from an arcgis user. In arcgis the module
"FLOWACCUMULATION(FLOW_DIR)" would do this, but I want to use an open
source solution.

If anyone could give me a hint, where I could find a tool like this
(inside GRASS it does not seem to be possible), I would be very grateful.

Best regards,
Achim
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

10

2009/11/19 Achim Kisseler <ak7@jupiter.uni-freiburg.de>:

Thanks, Jaroslaw for response,

there shoud be no problem if you have oryginal DEM

I know, but I do NOT have the DEM. Thats the problem.

Ah, now I understand "is there a way in GRASS to build an
accumulation map from a directions map without a dem map?"

So: If you are on earth, you can get it here (mars/moon should be also
available somewhere :-):

http://grass.osgeo.org/wiki/Global_datasets
- SRTM
- ASTER GDEM

especially
http://grass.osgeo.org/wiki/ASTER_topography

If you need to start from the accumulation map and no way to
use a DEM, then I have no idea (but see the other comments)

Hope this helps,
Markus

11

Dear Markus,

I follow Silvias suggestion and use h.tca in JGRASS.

BTW: Isn't is possible to integrate the horton-tools into grass?

Thanks,
Achim

Markus Neteler schrieb:

2009/11/19 Achim Kisseler <ak7@jupiter.uni-freiburg.de>:

Thanks, Jaroslaw for response,

there shoud be no problem if you have oryginal DEM

I know, but I do NOT have the DEM. Thats the problem.

Ah, now I understand "is there a way in GRASS to build an
accumulation map from a directions map without a dem map?"

So: If you are on earth, you can get it here (mars/moon should be also
available somewhere :-):

http://grass.osgeo.org/wiki/Global_datasets
- SRTM
- ASTER GDEM

especially
http://grass.osgeo.org/wiki/ASTER_topography

If you need to start from the accumulation map and no way to
use a DEM, then I have no idea (but see the other comments)

Hope this helps,
Markus

12

On Thu, Nov 19, 2009 at 2:35 PM, Achim Kisseler
<ak7@jupiter.uni-freiburg.de> wrote:

Dear Markus,

I follow Silvias suggestion and use h.tca in JGRASS.

BTW: Isn't is possible to integrate the horton-tools into grass?

If the license is compliant to GPL (I guess so), yes.

Markus

13

BTW: Isn't is possible to integrate the horton-tools into grass?
    
If the license is compliant to GPL (I guess so), yes.
  

Hi Markus,
Horton Machine licence is LGPL and written in Java...

Silvia

14

Markus Neteler pisze:

On Thu, Nov 19, 2009 at 2:35 PM, Achim Kisseler
<ak7@jupiter.uni-freiburg.de> wrote:
  

Dear Markus,

I follow Silvias suggestion and use h.tca in JGRASS.

BTW: Isn't is possible to integrate the horton-tools into grass?
    
If the license is compliant to GPL (I guess so), yes.
  

Hortons tools are available in svn add ons as r.stream.* suite: r.stream.extract, r.stream.order, r.stream.stats etc... see tutorial on grass wiki
http://grass.osgeo.org/wiki/R.stream.*
Jarek

Markus
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15

Hi all,

again I reached the point I did half a year ago: jgrass only can handle 'metric' rasters, which means raster-cells of equal sizes, same NS, OW resolution.

I work an a latlon-projection and therefore I cannot use jgrass.

? 1 I guess, r.stream cannot handle latlong-projections?
? 2 I guess, r.stream doesn't have something like h.tca?
     (h.tca: makes an accumulation map from a direction map)

? 3 Is it possible to make the accumulation-values non-integer and weight every grid-cell with its real area size? Then every accumulation value would indicate its basin-size and so on like in eg. lambert projection.

What wouldn't work that easy: distances EW and thus angle based calculations, too.

Again my old PROBLEM:
How to get an accumulation map strickly WITHOUT an DEM from ONLY an direction map on a LAT-LON map?

Achim

Jarek Jasiewicz schrieb:

Markus Neteler pisze:

On Thu, Nov 19, 2009 at 2:35 PM, Achim Kisseler
<ak7@jupiter.uni-freiburg.de> wrote:

Dear Markus,

I follow Silvias suggestion and use h.tca in JGRASS.

BTW: Isn't is possible to integrate the horton-tools into grass?
    
If the license is compliant to GPL (I guess so), yes.
  

Hortons tools are available in svn add ons as r.stream.* suite: r.stream.extract, r.stream.order, r.stream.stats etc... see tutorial on grass wiki
http://grass.osgeo.org/wiki/R.stream.*
Jarek

Markus
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