Chuck,
Thanks for your reply. The DEM has 8,627 rows and 10,270 columns.
The command line statement I used is:
r.watershed el=fill th=400 ac=fac ba=basins st=str
I have also tried using the -m and -4 flags placed after the r.watershed part.
Thanks,
Matt
Quoting Charles Ehlschlaeger <[EMAIL PROTECTED]>:
How many rows and columns are in the input map? Also include the exact
command line statement you use to run the program.
Sincerely, chuck
Chuck Ehlschlaeger, Geospatial Science Consultant
PERTAN GROUP, http://pertan.com/
[EMAIL PROTECTED], 309-255-2727
http://chuck.ehlschlaeger.info/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Wednesday, January 23, 2008 7:15 AM
To: [email protected]
Subject: [GRASS-user] Use of r.watershed
Hello All,
I am new to GRASS but have been using GIS (mainly ESRI products) for
quite a few years. I am trying to learn how to use GRASS to carry out
hydrology related analyses. Currently, I am trying to use the
r.watershed command to delineate the basins for a watershed. My
question is, how long would you expect it to take to run? I am
wondering if I am doing it wrong or if it just takes longer than I
would expect. The DEM is about 170MB TIFF before I import it to
GRASS. I have tried to run it a few times using different options,
each time letting it run for 3 - 4 hours before killing it. I have
tried both the -m and -4 flags. Any input would be appreciated.
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.9/1238 - Release Date: 1/22/2008
8:12 PM
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.9/1238 - Release Date: 1/22/2008
8:12 PM
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
