What about obtaining the main direction of the river (North - South/ East- West) and creating the rows/columns based on that? Any advice/ help would be appreciated! Thanks all Le gach dea ghui, *Shane Carey* *GIS and Data Solutions Consultant*
On Tue, Oct 16, 2018 at 7:49 AM Shane Carey <careys...@gmail.com> wrote: > Ok, I seem to be getting closer to what I need. It works well where the > river is perpendicular to the column (see slide 3) but where it is > parrallel (see slide 4), I would need to obtain a rows map. Is there any > way of being able to tell it to create rows or columns based on the river > direction? > > <http://goog_326768947> > > https://docs.google.com/presentation/d/1x7IQ3BJlLLSb6R2atxIIiaeWzyCqCZQ3uWaGPZyo6ds/edit?usp=sharing > > Or if you think there is a better way of reaching my end goal (slide 2), I > would be interested in hearing your thoughts. > Thanks > > Thanks > > Le gach dea ghui, > *Shane Carey* > *GIS and Data Solutions Consultant* > > > On Tue, Oct 16, 2018 at 6:38 AM Johannes Radinger < > johannesradin...@gmail.com> wrote: > >> It seems that would would like to have your floodplain cut based on the >> columns of the underlying raster-resolution (and not perpendicular to the >> river line as initially stated). You could use mapcalc to generate a column >> raster map (r.mapcalc expression="colmap = col()") which you could then >> transform to a vector map and use to intersect with your floodplain vector. >> >> best >> Johannes >> >> On Tue, Oct 16, 2018 at 1:24 AM Shane Carey <careys...@gmail.com> wrote: >> >>> Hi All, >>> >>> I don't think v.transects is going to work for me as lines appear to be >>> cutting across each other. Is there another tool in Grass that can cut the >>> floodplain polygon into 5m lengths (as green lines in image attached) >>> >>> Thanks >>> >>> >>> >>> On Luan 15 DFómh 2018 at 15:38, Shane Carey <careys...@gmail.com> wrote: >>> >>>> Great thanks, is there anything available that will snap these lines to >>>> the polygon edges? >>>> >>>> Thanks >>>> Le gach dea ghui, >>>> *Shane Carey* >>>> *GIS and Data Solutions Consultant* >>>> >>>> >>>> On Mon, Oct 15, 2018 at 3:30 PM Markus Neteler <nete...@osgeo.org> >>>> wrote: >>>> >>>>> On Sun, Oct 14, 2018 at 11:28 PM Shane Carey <careys...@gmail.com> >>>>> wrote: >>>>> > >>>>> > Hi, >>>>> > >>>>> > I need to cut a floodplain polygon into one meter strips which are >>>>> perpendicular to the river. This needs to be an automated process. Just >>>>> wondering has anyone ever done this or similar in Grass GIS through python >>>>> or a bash script? >>>>> > >>>>> > The link attached shows two slides. Stage one is the first slide and >>>>> slide two is what I hope to end up with. >>>>> > >>>>> > >>>>> https://docs.google.com/presentation/d/1x7IQ3BJlLLSb6R2atxIIiaeWzyCqCZQ3uWaGPZyo6ds/edit?usp=sharing >>>>> >>>>> This addon seems to do (similar) perpendicular line creation: >>>>> v.civil - Generates a alignment for designing roads, channels, and >>>>> ports in civil engineering >>>>> https://grass.osgeo.org/grass7/manuals/addons/v.civil.html >>>>> >>>>> Best >>>>> Markus >>>>> >>>>> -- >>>>> Markus Neteler, PhD >>>>> http://www.mundialis.de - free data with free software >>>>> http://grass.osgeo.org >>>>> http://courses.neteler.org/blog >>>>> >>>> -- >>> Le gach dea ghui, >>> *Shane Carey* >>> *GIS and Data Solutions Consultant* >>> _______________________________________________ >>> grass-user mailing list >>> grass-user@lists.osgeo.org >>> https://lists.osgeo.org/mailman/listinfo/grass-user >> >>
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