Re: r.stream.slope
Micha Silver <[email protected]>
| Newsgroups | gmane.comp.gis.grass.user |
|---|---|
| Message-ID | <[email protected]> |
The input has to be the *flow direction* raster that is created by r.watershed. From the manpage (as Helmut suggested): direction Flow direction: name of input direction map produced by r.watershed or r.stream.extract. If r.stream.extract output map is used, it only has non-NULL values in places where streams occur. NULL (nodata) cells are ignored, zero and negative values are valid direction data if they vary from -8 to 8 (CCW from East in steps of 45 degrees). Direction map shall be of type CELL values. Region resolution and map resolution must be the same. It's best to keep these questions on the maillist. On 2017-12-25 14:44 PM, Shane Carey wrote: Sorry to bothering you again Micha, just one last question! When I run it, I get back raster dcell maps for gradient for the entire area and not just the streams. I presume I have to use the river network I previously created to extract the values at the streams. Thanks On Mon, Dec 25, 2017 at 10:39 AM, Shane Carey <[email protected] > wrote: Thanks, you're a star Micha! Thanks On Luan 25 Noll 2017 at 08:12, Micha Silver <[email protected] > wrote: On 2017-12-25 00:18 AM, Shane Carey wrote: Hi all, Justing wondering has anyone used r.stream.slope module? If so, what is it actually calculating? It calculates for each individual stream reach the difference in elevation, the average slope, and as a bonus you can get the minimum and maximum curvature (change in slope). Thanks to all who has helped me throughout the year! I've only recently started using Grass gis and find it absolutely brilliant! Nollaig Shona daoibh - happy Christmas in Irish!! Cheers -- Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab +972-523-665918 -- Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant -- Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab +972-523-665918 _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user