[GRASS-user] Use of r.watershed

[hydro at hydromodeling.com]

Markus,

I am running GRASS version 6.2.2 on Ubuntu 7.10.  I am at work right  
now and don't have access to the machine, but I am pretty sure about  
the GRASS version.  If I am wrong I will post a correction when I get  
home.

Matt

Quoting Markus Neteler <neteler at osgeo.org>:

> Matt,
>
> please also post to the list which GRASS version on which
> operating system you use.
>
> Markus
>
> On Jan 23, 2008 3:51 PM,  <hydro at hydromodeling.com> wrote:
>> 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.
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>>
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