Why not create a temporary vector map from the larger vector map in the for loop; do what needs to me done; clean up.
I would be interested in you solution, and could offer some help if you would like. I am going to have to process similar data. HTH Stephen On Tue, Feb 22, 2011 at 1:35 AM, Johannes Radinger <[email protected]> wrote: > > Am 22.02.2011 um 02:07 schrieb Daniel Victoria: > >> I'm not sure but from what I read in the r.stream.basins description, >> you can have more than one point in your vector file in roder to >> delineate your basins. Now, in case you have one basin inside another, >> what I did once was: >> 1) get x,y coordinates of each point using v.out.ascii >> 2) for each point run r.watershed... > Yes, thats what I want as well, but I want to automatize it and not to run > for each > point manually. I also want to run > for each point a grass-function (not necessarily r.stream etc.) > I just want to know how it basically works to loop over points. > > to things I thought: > 1) loop over the ascii if that is possible > 2) use the for loop in combination with v.db.select, but I don't know how that > will work in python > > /johannes > > >> >> Cheers >> daniel >> >> On Fri, Feb 18, 2011 at 11:49 AM, Johannes Radinger <[email protected]> wrote: >>> Hello, >>> >>> >>> -------- Original-Nachricht -------- >>>> Datum: Mon, 7 Feb 2011 22:25:31 -0200 >>>> Von: Daniel Victoria <[email protected]> >>>> An: Johannes Radinger <[email protected]> >>>> CC: [email protected] >>>> Betreff: Re: [GRASS-user] Python-Loop over points >>> >>>> Hi Johannes, >>>> >>>> You will need to use for loop. Something like this (UNTESTED!) >>>> >>>> for p in range(5): >>>> points_map = "point"+str(p) >>>> out_map = "output"+str(p) >>>> grass.run_command("r.streams.basins", dir = "flow_direction, >>>> points=points_map, basins = out_map) >>>> >>>> That should work, or at least something similar >>>> >>>> Daniel >>> >>> Thank you for your suggestions Daniel, I also thought about >>> a for loop. But in your case the loop is using for each iteration >>> a input-pointmap called "point"+str(p). >>> >>> The difference in my >>> case is that I've got only one vector map but with several points >>> in it and I want to iterate over the single points. >>> How is it possible to iterate over the single points? The points are >>> stored in a kind of list format, so it should somehow be possible to >>> loop over this file, but how? >>> >>> any suggestions? >>> >>> /johannes >>> >>>> >>>> On Wed, Feb 2, 2011 at 9:39 AM, Johannes Radinger <[email protected]> >>>> wrote: >>>>> Hello, >>>>> >>>>> I am performing e.g. the r.stream.basins calcutlation in python: >>>>> >>>>> grass.run_command("r.stream.basins", >>>>> dir = "flow_direction", >>>>> points = "point1", >>>>> basins = "output") >>>>> >>>>> that's working perfectly in the case of one single point in "point1". >>>>> How can I do that multiple times when the point layer consist of e.g. 5 >>>>> points and I want to create an output for each point (create 5 output >>>> rasters). >>>>> >>>>> How can that be done in a python script? >>>>> >>>>> >>>>> thank you >>>>> >>>>> Johannes >>>>> >>>>> -- >>>>> NEU: FreePhone - kostenlos mobil telefonieren und surfen! >>>>> Jetzt informieren: http://www.gmx.net/de/go/freephone >>>>> _______________________________________________ >>>>> grass-user mailing list >>>>> [email protected] >>>>> http://lists.osgeo.org/mailman/listinfo/grass-user >>>>> >>> >>> -- >>> NEU: FreePhone - kostenlos mobil telefonieren und surfen! >>> Jetzt informieren: http://www.gmx.net/de/go/freephone >>> > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > -- Stephen Sefick ____________________________________ | Auburn University | | Biological Sciences | | 331 Funchess Hall | | Auburn, Alabama | | 36849 | |___________________________________| | [email protected] | | http://www.auburn.edu/~sas0025 | |___________________________________| Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis "A big computer, a complex algorithm and a long time does not equal science." -Robert Gentleman _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
