[GRASS-user] r.water.outlet: no map displayed

[Laurent C.]

Hello Rich,

When using r.water.outlet you need to be careful setting the outlet on the
exact flow line. Using the flow accumulation map is useful for that task.
If the outlet point is just one cell on the side, the generated watershed
could be tiny.
Hope this helps.

Laurent

El oct. 2, 2016 6:17 PM, "Rich Shepard" <rshepard at appl-ecosys.com> escribió:

>   For some reason r.water.outlet now produces an empty map. It did before I
> re-projected source maps to ensure they all have the proper values in the
> target location.
>
>   Attached is an image of the input drainage map and the coordinate feature
> (the lower dot).
>
>   This is how r.info describes the output (watershed) map:
>
> Type of Map:  raster               Number of Categories: 0               |
>    Data Type:    CELL
>    Rows:         1004
>    Columns:      577
>    Total Cells:  579308
>
>    Projection: NAD83(HARN) / Oregon North
>    N: 175430.80940854    S: 174426.61003591   Res: 1.00019858
>    E: 2296197.40538338    W: 2295620.05945154   Res: 1.00059954
>    Range of data:    min = 1  max = 1
>
> Data Description:                                                        |
>    generated by r.water.outlet
>
>    Comments:
>    r.water.outlet --overwrite input="drainage" output="watershed" coord\
>      inates=2295821.27858,175258.094514
>
>   I'm not seeing what I've done differently so that there's no visible
> display of map "watershed."
>
> TIA,
>
> Rich
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