[GRASS-user] Use of r.watershed

[hydro at hydromodeling.com]

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 <c.ehlschlaeger at insightbb.com>:

> 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/
> c.ehlschlaeger at insightbb.com, 309-255-2727
> http://chuck.ehlschlaeger.info/
>
>
> -----Original Message-----
> From: grass-user-bounces at lists.osgeo.org
> [mailto:grass-user-bounces at lists.osgeo.org] On Behalf Of
> hydro at hydromodeling.com
> Sent: Wednesday, January 23, 2008 7:15 AM
> To: grass-user at lists.osgeo.org
> 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
> grass-user at lists.osgeo.org
> 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
>
>