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Questions tagged [grass-7.2]

Use this tag when GRASS 7.2 is the version you are using from the GRASS platform.

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26 views

Creating cumulative friction map

I am looking at bottom friction (Manning's n) values in relation to storm surge as large volumes of water flow over a surface. In order to calculate total head loss occurring as water passes from the ...
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0answers
41 views

Adding map to layer manager (wxpython GUI) from grass console?

I'm trying to follow a Grass tutorial in which it is described how to use grass with --wxpython GUI: when grass is launched from linux terminal, a Layer Manager and a Map Display appears along Grass ...
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0answers
62 views

Generating flow path using r.drain from rgrass

I need to generate the flow path using r.drain from the rgrass7 package in RStudio. I am new to GRASS GIS and prefer to use the R package instead. I want to generate a flow path from a grid cell. ...
0
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1answer
63 views

Error - Grass 7 doesn´t run because isn´t not sucessfully installed

I am having problems to run GRASS7 from the processing tool. Always run the following error that is not corrected instaled. I ve reinstall QGIS several times, even tried different versions,as also ...
1
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1answer
183 views

QGIS 3 GRASS 7 locale warning on Mac

I am having trouble getting Grass 7.2 to work in QGis 3.2. As instructed per kyngchaos, I used the following prepend PATH to get rid of error "env: python3: No such file or directory" /Library/...
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1answer
120 views

Loading ADF file from National Elevation Dataset into GRASS with Python?

I'm trying to load data from the National Elevation Dataset into GRASS/Python, using this Python script (outside of GRASS): # Imports import os import grass_session from grass.script import setup as ...
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0answers
20 views

GRASS session fail to start because of g.extension failed on linux mint

I am struggling to start any existing Grass sessions (that was working before) in Linux Mint 18.3 Cinnamon 64 bit on an Oracle virtual machine. The following error is popping up every time I am ...
4
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1answer
840 views

QGIS GRASS Processing Not Working on MacOS?

Recently upgraded to QGIS3 (3.0.2) for MacOS (High Sierra) and encountered GRASS (7.2.2) issues. Tried adding a custom variable and now when running GRASS algorithms (e.g. r.reclass) I get the ...
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0answers
60 views

GRASS GIS gui or shell? [closed]

I am shifting from QGIS to GRASS GIS. I believe GRASS GIS enables better automatization and QGIS basically uses a bunch of GRASS GIS functions anyway. However, the change is not as smooth as I ...
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0answers
86 views

QGIS 2.18 r.patch fails “Input raster map contains cells with NULL-value (no-data)”

In QGIS 2.18.16 with GRASS 7.4.0 (Windows 7, 64 bit), I am trying to create a composite raster layer from two nearly identical versions of a 3-band color geotiff that almost (but not quite perfectly) ...
2
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1answer
41 views

Precision loss in the REAL fields when saving GRASS layer as shp with QGIS

I am using QGIS version 2.18.14 with GRASS 7.2.2 to clean up some geometry issues within shp files I have. I have an initial shapefile “test.shp” which has a field named “area”. The “area” type is ...
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0answers
68 views

Spyder 3.2.6 does not work with GRASS GIS 7.2.2

I've installed spyder 3.2.6 with pip from the OSGeo console. There is a spyder.exe file in ~\OSGeo4W64\apps\Python27\Scripts and the Spyder package directories show up in site-packages. If I run the ...
2
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1answer
129 views

grass GIS + spyder python script error

I'm getting crazy with grass gis and python. I want to call a grass function from an external python script (using spyder for instance). I've installed QGIS + GRASS with the OSGeo4W64 installation ...
2
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1answer
24 views

Issue with GRASS i.tasscap

I'm trying to carry out Tasseled Cap Transformations in GRASS GIS. I have a Landsat 8 image with bands 2-7 that are needed for the calculation. I have imported the bands into GRASS and attempted to ...
0
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1answer
117 views

Batch raster processing or other way?

I new man in processing and modeling rasters by GRASS GIS. But I have one unsolved problem. I have a lot of rasters with similar names: raster_1, raster_2, ..., raster_100. Also in my work ...
0
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1answer
336 views

Can't install extensions nor grass-dev package [closed]

I've been trying to install several extensions on my newly installed GRASS GIS 7.2 (installed following instructions here), amongst them "i.fusion.hpf". The extension doesn't seem to matter as the ...
6
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1answer
171 views

Error in GRASS using i.segment.uspo function

So I was using this function called i.segment.uspo and I got this error ERROR: Insufficient number of non-NULL cells in current region Traceback (most recent call last): File "/usr/lib/...
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0answers
75 views

GRASS GIS Windows 8.1 error

So I am a new user with GRASS 7.2, in Windows, and the problem was when I first booted GRASS GIS, I had to create a new location, for my data, but every time I was trying to create that location GRASS ...
3
votes
1answer
169 views

Using NASA's GIBS servers with GRASS GIS

I am trying to download WMS tiles into a grass mapset. I'd like to use NASA's GIBS servers which replaced the JPL OnEarth services. I'm not sure how much remains the same between the two services, but ...
3
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0answers
64 views

Format field in header file invalid for GRASS GIS?

I have a raster map in GRASS database. When i try to load using d.rast map=Raster-name I get the following error: Failed to run command. Details: GRASS_INFO_ERROR(9937,1):Raster map (Raster-...
5
votes
1answer
81 views

Creating a GUI toolbox for a GRASS add-on

In Vaclav Petras' GRASS add-on guide it is stated that GUI toolboxes for GRASS add-ons are defined in the toolboxes.xml file, that must then be added to the main installation folder: You have to ...
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0answers
118 views

v.category fails to add missing categories to v.type output

This is a long story, but I am not certain where exactly the problem is. I started with a polygon (area) that I converted to a line using v.type: > v.type input=debug_interpol_area output=...
1
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2answers
180 views

v.surf.idw ignores mask

I have two vectors, one with points and another with the extent of a zone of interest: I would like to interpolate a surface within that zone of interest. This is just a small example, with larger ...
1
vote
1answer
289 views

No Grass plugin in plugin manager in Qgis 2.14 on ubuntu 16.04

I have installed QGIS 2.14.15-Essen and GRASS GIS 7.2.1, but there is no option to add GRASS plugin in Plugin Manager
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2answers
169 views

Defining GRASS region in RQGIS?

I would like to use grass7:i.image.mosaic algorithm in R using RQGIS packages But I don't understand how I can define it I have 14 rasters named r1:r14. I do params <- get_args_man(alg = "grass7:...
1
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2answers
117 views

r.mfilter produces empty result

I am trying to apply a high pass filter to a raster that is portrayed like this in the Map Display: For starters I double check the region: > g.region raster=blenddem > g.region -p projection: ...
2
votes
1answer
254 views

Why is r.out.gdal exporting empty rasters?

I need to export a raster I produced with GRASS. The Map Display portraits this raster like this: The metadata of this raster also looks pretty normal: > r.info map=blenddem +--------------------...
0
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1answer
115 views

Grass-gis grid and Shapefile grid: what's the difference?

I have a raster map with trees in grass (1 and NULL value) for 6m resolution. I would like to aggregate this data in a grid with a resolution of 250m. For that I have created a grid with v.mkgrid and ...
5
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2answers
376 views

Can't access GRASS GIS modules from within Python 2.7

Using the tutorials posted here, here and here, I am trying to setup a script that will make use of several GRASS GIS raster functions externally. For now I am just trying to get the tutorial script ...
1
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1answer
1k views

Calculating Albedo for Landsat 8 using QGIS with GRASS?

I am trying to estimate albedo for Landsat 8 OLI. The idea was to use the GRASS function i.albedo within the processing toolbox of QGIS. However, the option for Landsat 8 OLI is not available, ...
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0answers
65 views

Why are geoalgorithms missing from QGIS processing toolbox (GRASS & SAGA) [duplicate]

I am wanting to calculate albedo from a Landsat 8 set of bands. When I use GRASS' Processing toolbox i.albedo, within QGIS, the option for landsat 8 is not avaialbe, however if I use GRASS separately ...
1
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1answer
97 views

how the grass-gis extension r.diversity work?

I have found a nice paper about r.diversity extension. But I don't understand why... it returns me empty raster without errors. I have tried to compute diversity on ndvi from spot6 image... r....
1
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1answer
44 views

export grass-gis pansharpened image

I have pansharpened my spot 6 image within grass 72 using i.fusion.hpf and it work well! i.fusion.hpf pan=SPOT6_P_20151113@PERMANENT msx=SPOT6_MS_20151113.1@PERMANENT,SPOT6_MS_20151113.2@PERMANENT,...
2
votes
1answer
410 views

GRASS 7.2.0 doesn't start on PC

when I want to start the program a black window opens and show me the next message: Traceback (most recent call last): File "C:\PROGRA~1\QGIS2~1.18\apps\grass\grass-7.2.0\etc\grass72.py", line 1971,...
2
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1answer
415 views

Import ESRI ASCII raster with python to GRASS

I had to get used to GRASS the last two days because I can't set up my python IDE to work with my osgeo4w python and I find it incredibly clunky. I have a simple ascii raster - I think its origin is ...
2
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0answers
57 views

Generating ground control points with GRASS?

I want to find out matching ground control points in two images for auto georeferencing and grass manual says that i.points.auto will do the job. I am using Grass 7.2 but couldn't find this plugin.
3
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2answers
2k views

QGIS 2.18 Windows 10, 32 bit system - where is the GRASS plugin?

I checked these question/answers already, but they did not address my issue: GRASS plugin missing from QGIS 2.14.3 Essen in Ubuntu 14.04 How do I get grass plugin working in QGIS for Windows? I am ...
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0answers
56 views

How to add r.vieshed.cva to QGIS 2.18.3 processing toolbox? [duplicate]

I want to add r.vieshed.cva on my grass 7.2.0 from QGIS 2.18.3. I need to access to r.vieshed.cva from processing and conect it with processing.runalg(). I saved the alg on C:\Program Files\QGIS 2.18\...