Re: [GRASS-user] Raster boxplots selection
On Wed, Aug 7, 2024 at 11:00 AM sibylle via grass-user < grass-user@lists.osgeo.org> wrote: > Dear coummunity > > > > I am wondering if my code for selecting specific raster points (e.g. > squares, Quadrate) has a bug. I do not want to plot all squares, because I > still have not yet data for all squares. > > > > v.extract quadrat out=quadrat_3 where="ID_Quadrat=527190 and > ID_Quadrat=569228 and ID_Quadrat=581166" --o > > > The where statement will result in no quadrats selected. Use 'or' instead of 'and': v.extract quadrat out=quadrat_3 where="ID_Quadrat=527190 or ID_Quadrat=569228 or ID_Quadrat=581166" --o This will give you the three quadrats (or the quadrats that have those IDs, in case there are more quadrats with the same ID). The resason is that I get an error on the next line > > > > v.to.rast quadrat_3 out=quadrat_3 use=attr attribute_column=ID_Quadrat > --o > > ERROR: Database connection not defined for layer <1> > > > > Full Code: > > r.import input=allema_LZall_UAA_pres_merged.tif output=al_pres --o > > g.region -ap rast=al_pres > > v.import input=untersuchungsquadrate_2020_2024.gpkg output=quadrat --o > > v.info -g quadrat > > > > v.extract quadrat out=quadrat_3 where="ID_Quadrat=527190 and > ID_Quadrat=569228 and ID_Quadrat=581166" --o > > v.to.rast quadrat_3 out=quadrat_3 use=attr attribute_column=ID_Quadrat --o > > r.boxplot -o input=al_pres zones=quadrat_3 output="al_pres_boxplot_3.png" > raster_statistics=median –o > > > > Thanks a lot > > Sibylle > ___ > grass-user mailing list > grass-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-user > ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Using RStudio in a GRASS GIS session
From the message that library is not found, I wonder, did you type GRASS> rstudio & library(grass) all on the command line? Just to be sure, you should ope Grass gis. And in the grass gis command line, type rstudio & Next, after RStudio opens, you type the following in RStudio library(grass) On April 18, 2024 7:56:03 PM GMT+02:00, Veronica Andreo via grass-user wrote: >Hello Sibylle, > >Perhaps you can tell us some details about your operative system, which >GRASS installer you are using (i.e., standalone or OSGeo4W), how did you >start GRASS, if R and RStudio are installed. > >From your email, I do not understand why GRASS is not recognized as a >command, as it seems you **are** already within a GRASS session on the >terminal? (i.e. you have a GRASS prompt there `GRASS>`). > >Vero > >El jue, 18 abr 2024 a las 12:06, Micha Silver via grass-user (< >grass-user@lists.osgeo.org>) escribió: > >> Silly question, do you have the 'rgrass' library installed? >> >> i.e. can you do `library(rgrass)` at the R command prompt (without >> rstudio)? >> >> >> >> On 17/04/2024 21:34, sibylle via grass-user wrote: >> >> Dear community >> >> To use RStudio in a GRASS GIS session I used the command line >> GRASS> rstudio & >> library(rgrass) >> (see https://grasswiki.osgeo.org/wiki/R_statistics/rgrass) >> >> Unfortunately I was not able to solve the error message: >> - The command "GRASS" is either misspelled or >> could not be found. >> - The command "library" is either misspelled or >> could not be found. >> >> Kind regards >> Sibylle >> >> >> >> (Wed Apr 17 20:25:17 2024) >> >> GRASS> rstudio & >> >> Der Befehl "GRASS" ist entweder falsch geschrieben oder >> konnte nicht gefunden werden. >> (Wed Apr 17 20:25:17 2024) Command ended with non-zero return code 1 (0 sec) >> >> (Wed Apr 17 20:25:29 2024) >> >> library(rgrass) >> >> Der Befehl "library" ist entweder falsch geschrieben oder >> konnte nicht gefunden werden. >> (Wed Apr 17 20:25:29 2024) Command ended with non-zero return code 1 (0 sec) >> >> >> ___ >> grass-user mailing >> listgrass-user@lists.osgeo.orghttps://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 >> grass-user@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/grass-user >> > > >-- >Dra. Verónica Andreo >Investigadora Adjunta de CONICET >Instituto Gulich (CONAE - UNC) >Centro Espacial Teófilo Tabanera (CETT) >Falda del Cañete - Córdoba, Argentina >+54 3547 40 int. 1153 >https://veroandreo.gitlab.io/ ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Multidirectional hillshading scripts / addons?
Hi, Not sure about grass gis, but have you tried the multidirectional option when styling a raster as a hillshade in QGIS? See https://bnhr.xyz/2019/01/22/hillshade-in-qgis.html. Cheers, Paulo On Fri, Feb 16, 2024 at 11:20 PM B H via grass-user < grass-user@lists.osgeo.org> wrote: > Hi, > I am trying to create a hillshading effect using DEM rasters similar to > ESRI multidirectional hillshading, but I am unable to get anything in. > grass to perform as good as ESRI (or even gdaldem multidirectional shading). > I am hoping someone in this group has some scripts /addon/tips that I can > try. > > So far I have tried the following on a few DEMs ( from 3m to 100 m grid > sizes). > 1) gdaldem multidirectional hillshading : It's not grass based, but so > far has performed better than other grass options : with the parameter > zfactor between 1 and 10. But it does not seem to be quite as good as ESRI. > 2) Following code is based on some old discussion on this email list.(Its > seems to exaggerate the hills and valleys more than I would expect) > https://gist.github.com/amcox/b54d65f08fe4448840462901fd6350d4 > 3) Other variants of hillshading like r.skyview : Tried with several > parameters but it seems to be inferior to gdaldem (It seems to be a 'washed > out' version of the multidirectional. hillshading). > > Thanks, > HB > ___ > grass-user mailing list > grass-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-user > ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user
