[GRASS-user] delineate Watersheds

GRASS GRASS user
1

Hello list,

I trying to delineate watersheds in a STRM-data(DGM.tif)

| Data Type: CELL |
| Rows: 1809 |
| Columns: 1413 |
| Total Cells: 2556117

I´m trying with r.terraflow and the error is: " Cell file < DGM.tif resolution differs from current region>

and too I try with r.watershed and finally the run the basin is empty. (0.0)

I´m using the nightly build- SEXTANTE (gvSig 1.11)

Any idea what is wrong? Any suggestions are welcome!

Cheers!

Ruth

2

Hi Ruth,

Try

g.region rast=YourMap
r.terraflow...

good look

milton

2011/11/11, Ruth Sos Del Diego <rsosdeldiego@googlemail.com>:

Hello list,

I trying to delineate watersheds in a STRM-data(DGM.tif)

| Data Type: CELL |
| Rows: 1809 |
| Columns: 1413 |
| Total Cells: 2556117

I´m trying with r.terraflow and the error is: " Cell file < DGM.tif
resolution differs from current region>

and too I try with r.watershed and finally the run the basin is empty. (0.0)

I´m using the nightly build- SEXTANTE (gvSig 1.11)

Any idea what is wrong? Any suggestions are welcome!

Cheers!

Ruth

--

Miltinho - mcr@rc.unesp.br
Laboratório de Ecologia Espacial e Conservação - LEEC
Depto de Ecologia - UNESP - Rio Claro
Av. 24A, 1515- Bela Vista
13506-900 Rio Claro, SP, Brasil

http://www.rc.unesp.br/ib/ecologia/
Fone: +55 19 3526-9647
Cel: 19 9853-3220 / 19 9853-5430

3

On Fri, 2011-11-11 at 11:23 -0200, Milton Cezar Ribeiro wrote:

Hi Ruth,

Try

g.region rast=YourMap
r.terraflow...

good look

milton

2011/11/11, Ruth Sos Del Diego <[rsosdeldiego@googlemail.com](mailto:rsosdeldiego@googlemail.com)>:
> Hello list,
>
>
> I trying to delineate watersheds  in a STRM-data(DGM.tif)
>
>  |   Data Type:    CELL                              |
>  |   Rows:         1809                           |
>  |   Columns:      1413                             |
>  |   Total Cells:  2556117
>
> I´m trying with r.terraflow and the error is: " Cell file < DGM.tif
> resolution differs from current region>
>
> and too I try with r.watershed and finally the run the basin is empty. (0.0)
>

In addition to Milton’s suggestion, please post exactly what parameters you’re sending to r.watershed

>
>
> I´m using the nightly build- SEXTANTE (gvSig 1.11)
>

??
Are we taking about GRASS or Sextante??

–
Micha

>
>  Any idea what is wrong? Any suggestions are welcome!
>
> Cheers!
>
> Ruth
>