Re: [GRASS-user] v.water.outlet

2012-01-06 Thread Markus Metz
On Fri, Jan 6, 2012 at 9:42 AM, Moritz Lennert wrote: > On 06/01/12 09:23, Markus Metz wrote: >> >> On Thu, Jan 5, 2012 at 12:12 PM, Massimiliano Cannata >>  wrote: >>> >>> Moreover, >>> check that your dem has sinks filled (r.fill.dir) >> >> >> Since the drainage map has been created by r.waters

Re: [GRASS-user] v.water.outlet

2012-01-06 Thread Moritz Lennert
On 06/01/12 09:23, Markus Metz wrote: On Thu, Jan 5, 2012 at 12:12 PM, Massimiliano Cannata wrote: Moreover, check that your dem has sinks filled (r.fill.dir) Since the drainage map has been created by r.watershed, sink filling is not only not needed but does more harm than good and should n

Re: [GRASS-user] v.water.outlet

2012-01-06 Thread Markus Metz
On Thu, Jan 5, 2012 at 12:12 PM, Massimiliano Cannata wrote: > Moreover, > check that your dem has sinks filled (r.fill.dir) Since the drainage map has been created by r.watershed, sink filling is not only not needed but does more harm than good and should not be used to prepare a DEM for r.water

Re: [GRASS-user] v.water.outlet

2012-01-06 Thread Markus Metz
On Thu, Jan 5, 2012 at 12:16 PM, Paolo Cavallini wrote: > Il 04/01/2012 20:55, Micha Silver ha scritto: > > >> I guess you mean r.water.outlet? > > > Yes, sorry. > > >> 1- The input must be the drainage *direction* map from r.watershed. > > > ok > > >> 2- And it's crucial that the easting and nort

Re: [GRASS-user] v.water.outlet

2012-01-05 Thread Massimiliano Cannata
Moreover, check that your dem has sinks filled (r.fill.dir) Bye, Maxi On 01/04/2012 08:55 PM, Micha Silver wrote: On 01/04/2012 07:27 PM, Paolo Cavallini wrote: Hi all. I tried this command, but I always get a map full of 0. I start from a drainage map from r.watershed, as described. Anyone

Re: [GRASS-user] v.water.outlet

2012-01-05 Thread Paolo Cavallini
Il 05/01/2012 12:35, Moritz Lennert ha scritto: AFAIU r.water.outlet is extremely sensitive to local variations of terrain. Check the drainage direction map close to your point to see whether the resulting watershed is coherent with these directions. Oh, this could be an explanation - the or

Re: [GRASS-user] v.water.outlet

2012-01-05 Thread Moritz Lennert
On 05/01/12 12:16, Paolo Cavallini wrote: Il 04/01/2012 20:55, Micha Silver ha scritto: I guess you mean r.water.outlet? Yes, sorry. 1- The input must be the drainage *direction* map from r.watershed. ok 2- And it's crucial that the easting and northing parameters for the outlet point l

Re: [GRASS-user] v.water.outlet

2012-01-05 Thread Paolo Cavallini
Il 04/01/2012 20:55, Micha Silver ha scritto: I guess you mean r.water.outlet? Yes, sorry. 1- The input must be the drainage *direction* map from r.watershed. ok 2- And it's crucial that the easting and northing parameters for the outlet point lay exactly on a stream. Zoom in very close

Re: [GRASS-user] v.water.outlet

2012-01-04 Thread Micha Silver
On 01/04/2012 07:27 PM, Paolo Cavallini wrote: Hi all. I tried this command, but I always get a map full of 0. I start from a drainage map from r.watershed, as described. Anyone confirms, or am I doing something wrong? All the best.

[GRASS-user] v.water.outlet

2012-01-04 Thread Paolo Cavallini
Hi all. I tried this command, but I always get a map full of 0. I start from a drainage map from r.watershed, as described. Anyone confirms, or am I doing something wrong? All the best. -- Paolo Cavallini See: http://www.faunalia.it/pc ___ grass-use