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Questions tagged [grass]

GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a free and open source Geographic Information System (GIS) software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization.

GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a free and open source Geographic Information System (GIS) software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization. GRASS GIS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. It is a founding member of the Open Source Geospatial Foundation (OSGeo).

http://grass.osgeo.org/

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Export multiple raster from grass gis

I used r.tile (http://grass.osgeo.org/grass71/manuals/r.tile.html) to create tiles from a huge geotiff. Now i want to export each tile to a file but havent found an easy way: Using r.out.gdal I only can export one tile at a time which makes it…
flu_tschi
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Where do I download grass.scripts and/or grass.pygrass?

I am trying to learn how to do some scripting to run Grass externally with Python but I can't seem to even find the basic modules called for this type of script. All of the documentation I have seen describes using grass.scripts module but I don't…
Casivio
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GRASS GIS line of sight but permeable

GRASS GIS line of sight but permeable My Data I have a digital terrain model (brown), a height model for buildings (grey), a height model for trees (green). My goal For light pollution and ecology issues, I'd like to compute light emission on each…
mathieu_r
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Is there a way to add the GRASS v.centerline function to the QGIS Toolbox GRASS functions?

The standard GRASS plugin in QGIS does not include the v.centerline function in the Toolbox.. it may be an extension that needs to be added.. is there a way to add v.centerline to the GRASS functions in the QGIS toolbox? Would prefer not having…
user199837
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Change R directory for site packages in GRASS

I'm using GRASS GIS 7.8.6 to try and achieve kriging In order to use this add-on extension I need to install certain R packages in which I am doing through the python console in GRASS. from rpy2.robjects.packages import importr from…
User_289
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How to add grass on a procedural mesh in Unity

I was unable to find a good tutorial to help me in my situation : I created a procedural mesh looking like an island in unity and I want to cover this mesh of grass but after a certain height (it's an island so I don't want grass on the beach...). I…
Nathan Bonelli
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How to cut vertices and faces connected to points lower than some value in pyvista?

So when one exports r.out.vtk from Grass GIS we get a bad surface with -99999 points instead of nulls: I want to remove them, yet a simple clip is not enough: pd = pv.read('./pid1.vtk') pd = pd.clip((0,1,1),…
DuckQueen
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How to create a large terrain with tile-level properties?

I need to create a 3D large terrain (say 2000x2000) where I need to track properties of the terrain surface at 1x1 resolution. For example, I want to keep track of how much grass or stones is in 1x1 area, which may change as game progresses…
Dilum Bandara
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reading GRASS raster maps into R

I used the command readRAST (rgrass7) to get maps into R. Now, it does not work. I tried several options with 0 result. Updated all R packages. Installed GRASS 7.8.5. Started Rgui within GRASS. Getting elev <- readRAST("elevation",…
Andrew Olenko
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QGIS - converting or saving temporary scratch layer

I have used the GRASS v.to.rast and r.surf.contour functions in the processing toolbox of QGIS 3.10.13 to generate DTM raster layers from some vector contour layers. However, the DTM layers are flagged as "Temporary layer only!", and QGIS warns that…
HaydnW
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Unable to open .gxw file in GRASS GIS

I am unable to open associate *.gxw files with grass gis 7.8.2 executable. I am using windows 8.1. Below I am attaching the error I have received.enter image description here
Anu Rai
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r.regression.series is not working for large number of rasters

I have been working with in GRASS GIS for linear regression on large number of rasters. I was using r.regression.series but it is only working for only 280 rasters and giving this error ERROR: Unable to open input file …
Muhammad Umar
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Read GRASS vector datasources in Python using GeoPandas

I am trying to read a GRASS GIS vector layer into a GeoPandas Dataframe. As I was not able to enable the GRASS GIS (read-only) drivers in Fiona see related issue I made a "hackish" method (which works) to read a GRASS GIS vector layer into a…
epifanio
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v.overlay error 'Intersection with points is not yet supported' after switching from GRASS 7.2.2 to 7.6.1

After switching from GRASS 7.2.2 to 7.6.1 v.overlay (operator=or) throws the error 'Intersection with points is not yet supported'. From this earlier question I gather that this is caused by polygons with an area of 0. In 7.2.2 the v.overlay…
Free_Range_Chicken
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Run GrassGIS API external on Python Shell Error module run None

I am trying to run the GrassGIS modules on external python scripts on a ms windows server 2016 standard. What ever I do (experimenting with different installations of Grass, changing environmental variables, changing python code) - it won't run. I…
Cucurbita
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