Dear Ming, To avoid that your suggestion gets lost in emails, please fill in a *feature request* issue with all details here: https://github.com/OSGeo/grass/issues/new/choose
Best, Vero El vie, 2 abr 2021 a las 16:37, ming han (<[email protected]>) escribió: > Maybe I am the only one who has this demand. Following is just a > recommendation to GRASS r.watershed function. > Maybe it is worth having an option to avoid r.watershed overcome > depressions. > The reasons are 1) there are many hydrologically pre condition DEM data > available globally, such as:HydroSHEDS, MERIT > 2) the depression in these DEM are real > depressions, overcome these depressions will make the entire drainage > system incorrectly. > > I understand GRASS has other functions to solve this problem, but just a > user recommendation. I use GRASS a lot. > > Thanks > Ming > > ming han <[email protected]> 于2021年3月30日周二 上午8:06写道： > >> Got it, thanks everyone~ >> Ming >> >> Micha Silver <[email protected]> 于2021年3月29日周一 下午2:40写道： >> >>> Hello: >>> >>> You might try `r.param.scale`, or even better `r.geomorphons` modules to >>> identify geomorphology features, then filter out all pixels identified >>> as pits. >>> >>> >>> r.watershed is purposely designed to overcome depressions, and find flow >>> routing thru these spots. So I don't think you can use that module to >>> identify depressions. >>> >>> >>> On 3/27/21 8:49 PM, ming han wrote: >>> > Hi Everyone >>> > >>> > When I do watershed delineation using r.watershed for great salt >>> > lake watershed. I found r.watershed always tried to assign an outlet >>> > for a great salt lake, which does actually not exist because it is an >>> > inland lake and the great salt lake has no watershed outlet at all. >>> > >>> > I noticed that there is a depression option. But is there any >>> > way that r.watershed can automatically identify depressions while >>> > defining flow accumulation and stream network? >>> > >>> > Thanks >>> > Ming >>> > >>> > _______________________________________________ >>> > grass-user mailing list >>> > [email protected] >>> > https://lists.osgeo.org/mailman/listinfo/grass-user >>> >>> -- >>> Micha Silver >>> Ben Gurion Univ. >>> Sde Boker, Remote Sensing Lab >>> cell: +972-523-665918 >>> >>> _______________________________________________ > grass-user mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/grass-user >
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