Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [grass-7.0]

Use this tag when GRASS 7.0 is the version you are using from the GRASS platform.

1
vote
1answer
63 views

GRASS 7.4 addons look installed but not accessable

I'm tring to install the addon v.centerline using the GRASS GUI 'Fetch & install extension from GRASS Addons'. I get the following message saying it's installed yet it doesn't show up. I tried ...
1
vote
1answer
371 views

Error opening GRASS mapset in QGIS?

I have installed Grass 7.0.5 but I cannot open a mapset via QGIS 2.18. I receive this error message: Cannot open the mapset. Mapset lock failed (exitStatus=1, exitCode=0, errorCode=1, error=Process ...
0
votes
1answer
28 views

Why doesn't wx graphical modeler Grass gis 7 work properly in Spanish?

I am working with the wx graphical modeler in grass gis 7. When I try to use a variable call "archivo" in spanish, wich is "file" in english, it does not work. The variable dont let me choose a file. ...
0
votes
1answer
84 views

correlation matrix and p-value in grass

I'd like to know if there is a way to obtain statistical significance and p-value for correlation coefficients calculated for different raster in grass with the command r.covar All that I obtain is ...
-3
votes
1answer
64 views

GRASS executable in Shell with R

I was trying to write a shell script using GRASS commands and I realized that I wanted to use R commands in my code but I couldn't find a way to execute the Rscript using my results from the GRASS ...
4
votes
0answers
135 views

Layers from GRASS db won't load in QGIS 2.18.4 desktop

I have been learning QGIS online but now I am stuck at a module. I am supposed to launch a project that includes GRASS vector and point layers. However, when I do so I always receive the 'Handle bad ...
3
votes
0answers
59 views

How to determine Kc value and apply it to r.sun?

As outlined in this link ( r.sun delievering unrealistic Values ) to get realistic values of kilowatt / meter-2, you must multiply the results by a "clear sky factor (Kc)". The link comments recommend ...
3
votes
0answers
132 views

Installing r.denoise on GRASS GIS (Windows) doesn't work

I try to install the r.denoise add on for GRASS GIS on my Windows machine. If I start the installation without copying the html manual by hand, I get the errnr 2 that this manual can't be found. After ...
3
votes
0answers
104 views

Missing list of algs in QGIS 2.14 Processing modeler?

I changed my QGIS-version from 2.8 to 2.14. I am very happy that v.net algs (grass7) are available now as part of the processing plugin. But now there is no list of algs inside the modeler - so no ...
3
votes
0answers
31 views

What does the blocking option do in GRASS r.watershed?

What does the blocking option do to the r.watershed program in grass? According to the manual, it should stop water from being routed past that location, but it appears to have no effect. I'm trying ...
2
votes
0answers
342 views

remove/fill gaps inside polygon qgis

I have created a polygon from grass gis and found small triangle like structure inside the polygon (sometimes at the edge to outside), that I want to remove/fill. I tried with geometry check to fix ...
2
votes
0answers
274 views

Using SAGA and GRASS on macOS Sierra?

I am trying to run QGIS 2.18.13 on Mac OS Sierra (10.12.4), but I'm having problems with SAGA and GRASS, at least from processing. Here's what I did: Installed QGIS from brew, but ended up having ...
2
votes
0answers
90 views

What does 'dither' mean in GRASS GIS?

What does the -d flag 'Dither' in GRASS GIS mean? For example in r.composite
2
votes
0answers
29 views

Error in reading coordinates in GRASS module in QGIS

I am trying to split some lines using points as described here: http://osgeo-org.1560.x6.nabble.com/How-to-split-a-line-using-points-td4981464.html When I run the comands: v.out.ascii <my points&...
2
votes
0answers
77 views

Problem with sampling points vectors on r.sim.water Grass GIS

I'm trying to run r.sim.water on grass GIS. it works but i don’t get any result on the text file i saved on the variable "logfile". I have tried different vector point for sampling locations. Does the ...
2
votes
0answers
256 views

r. mapcalc error in grass gis 7

After upgrading to 7.0.4, I could not execute r.mapcalc perfectly, there is a problem : syntax error, unexpected INTEGER, expecting VARNAME or NAME Parse error ERROR: parse error ERROR: An error ...
2
votes
0answers
60 views

Grass Gis r.viewshed how i can set max distance in meter or kilometer?

I have a problem with the r.viewshed max distance wiki: "The value entered is in the same units as the cell size of the raster. " Work: I get one geo file and where I run a viewshed with radius x(...
2
votes
0answers
99 views

Error when running v.krige

I've been trying to get v.krige to run in the Grass7 command line, however, when I do so I get the following error: Error : .onAttach failed in attachNamespace() for 'rgrass7', details: call: if (...
2
votes
0answers
161 views

GRASS GIS: how to run g.run_command(“v.extract”) in Python with sqlite, smooth-spline in GRASS GIS?

I would like to solve several problems by using a python script in GRASS GIS: I already uploaded collected GPS-waypoints and tracks ("v.in.org"), patched several GPS-vector data ("v.patch") and ...
2
votes
0answers
121 views

GRASS 7 r.sun aspect in doubt

I'm using r.sun in GRASS 7.0.3 to determine beam irradiance at a site (~ 56N -4W). I have a DEM (a local subset of EU-DEM). I'm using r.sun in mode 2, called from GUI. Typical logging in command ...
1
vote
0answers
16 views

QGIS 3.6.2 with GRASS - Can't find the GRASS command path parameter

I have QGIS 3.6.2 with GRASS 7.6.1 installed. Following the advise of this post GRASS Processing not working on QGIS? I want to work with GRASS 7.7 but I don't have the parameter to set the path to ...
1
vote
0answers
9 views

Cannot find Grass7 folder in QGIS 2.18 content folder

I have freshly re-installed QGIS 2.18.28 in the prescribed order. I was under the impression Grass7 in included in one of the install packages. But when trying to point QGIS to the grass7 folder under ...
1
vote
0answers
15 views

Points of drillhole data to 3D lines in GRASS

In GRASS 7.0 I have a 3D vector file which are several SPT drill holes, with the NSPT values at each interval. I was able to export these points to Paraview through "v.out.vtk -cn input = nspt_3D type ...
1
vote
0answers
38 views

Unable to make use r.drain

I want to calculate a cost distance model between a source of raw material and a group of sites. Raster and vector data are in the same CRS (EPSG 32615). I was able to use r.walk and get my cost and ...
1
vote
0answers
57 views

Can't get GRASS 7 V.kernel.vector to work on QGIS 2.18.14

I have reinstalled GRASS multiple times, with all of the necessary listed programmes to install beforehand (e.g. GDAL), and it won't work. The error comes up - GRASS was not found in '/Users/Shared/...
1
vote
0answers
82 views

r.stream.basin in qgis

I am trying to generate subbasin with provided multiple outlets points by using r.stream.basin. I have install r.stream.basin addon in grass but it does not appear in qgis. Is there any ways to use ...
1
vote
0answers
40 views

GRASS GIS Error Flags

I am attempting to run a GRASS command from the terminal and eventually a bash script, in which it links rasters in a folder to the Mapset previously defined. I was able to successfully create the ...
1
vote
0answers
27 views

How to interpret v.kernel network results

v.kernel "Optionally generates a vector density map on a vector network." I have done this for a network, but I don't understand how to interpret the output of this. Can anyone explain this? I am ...
1
vote
0answers
185 views

How to properly calculate annual irradiance using QGIS

I want to calculate annual irradiance for a couple of buildings to establish how much PV energy can be potentially harvested. Which algorithm You recommend for this purpose: "r.sun" from GRASS ...
1
vote
0answers
140 views

How to use GRASS command “r.stream.distance” in Qgis 2.16.2?

I like to figure out the distance from each cell to the outlet along the flow path. Maybe you can suggest some other opportunities/commands to solve my problem. It would be nice, if someone can help ...
1
vote
0answers
201 views

R.reclass Permission denied

I'm writing a script to treat some rasters. One of steps is a reclassification. So I use r.reclass from Grass. But unfortunately, it return a weird error message: IOError: [Errno 13] Permission denied:...
1
vote
0answers
71 views

r.out.xyz not working

I've got QGIS 2.8.1 - Wien on my system and often use the Grass tool r.out.xyz. Two of my colleagues have recently installed QGIS 2.18.12, which shows both Grass and Grass7 processing tools. Grass7 ...
1
vote
0answers
44 views

Can't Link grass to remote server postgis topology schema for import or export vector data

I have installed postgre/postgis on a remote server in which i want add topology data from Grass Gis to postgre topology schema. Grass gis 7.2.1 is installed on another PC on the network which has ...
1
vote
0answers
29 views

Grass raster export to ArcMap 10.2

I need to export raster (results of r.walk and r.drain) to ArcMap for comparison. I did it on data from guatemala - WGS84, UTM16N as r.out.gdal and it works normally. But when I did this on Slovak ...
1
vote
0answers
27 views

Dissolve polygons from layer1 witch overlaps with polygons of layer2 using GRASS

I want to dissolve polygons from layer1 witch overlap with polygons of layer2 keeping attributes table of layer1 and using command line. What I've done : v.in.ogr -o input=original_plygons output=...
1
vote
0answers
98 views

GRASS r.volume Error

I am writing a Python script which uses a vector polygon outline to construct a raster map of a hypothetical 'mound'. Finally, the script will output the volume of this mound using r.volume. The ...
1
vote
0answers
78 views

GRASS-GIS i.pansharpen error code -11

I have been searching for similar problems however i did not find any that could fix my error. i have GRASSGIS 7.0 running on MACOSX El Capitan. No problems at all until i tried to run i.pansharpen ...
1
vote
0answers
64 views

Choosing diffusion coefficient and other parameters for r.sim.water in GRASS7?

I'm trying to run r.sim.water in GRASS7 to simulate overland flow during a heavy rain event. My DEM has a resolution of 1m. I prepared it by adding values for buildings and included ditches and ...
1
vote
0answers
54 views

SPOT 1 HRV Atmospheric correction in GRASS GIS 7 returns NULL values

I'm having trouble using i.atcorr in GRASS 7. I am using 3-band SPOT 1 HRV image (Green, Red, NIR bands). Performed the i.atcorr for each band using the 6S parameters below (last parameter changed ...
1
vote
0answers
60 views

NVIZ not installed/working?

I am running GRASS GIS 7.0.4 on Ubuntu 16.04. After completing a tutorial on extruding vector data, I tried running the nviz command to see the result in a 3D-view. This is in norwegian, but it ...
1
vote
0answers
36 views

GRASS r.stream* modules failing to install in Ubuntu

I tried to install several r.stream* modules within GRASS GIS 7.0.4, running under Ubuntu 14.04. Specifically, after trying to install r.stream.order from g.extension, output console returns "...
0
votes
0answers
41 views

GRASS GIS Shortest path: Limit on number of calculations?

I'm trying to compute the shortest path between about 10'000 location-pairs. I've prepared my vector map as described in the documentation. I can calculate shortest path on about 1'000 location pairs ...
0
votes
0answers
52 views

DLL error and 1073741511 error running GRASS from external Python script

I am struggling to run any GRASS 7.4.1 Session from outside using Python 2.7.15 with Spyder IDLE. While setting up the GRASS bin and GRASS environment are as follows are all good and showing no ...
0
votes
0answers
12 views

Using GRASS 'i.atcorr' tool for more number of bands

I am using GRASS 6.4.4 for atmospheric correction. Can any one suggest how to add a sensor which needs a new argument for i.atcorr other than arguments mentioned in GRASS GIS manual: i.atcorr. I have ...
0
votes
0answers
22 views

Deleting multiple columns in vector attribute table selecting by wildcards in GRASS

I need to delete a series of columns of a vector attribute table inside GRASS before starting further processing. I know I can use v.db.dropcolumn map=vector@PERMANENT columns=col1,col2,col3 But if ...
0
votes
0answers
48 views

GRASS GIS - Entry point error for r.in.gdal

I am trying to run GRASS GIS 7.4.0 in Spyder (Python 2.7) - Windows 10 The simple code I am trying to run is as follows: import os import sys GISBASE = os.environ['GISBASE'] = 'C:\\Program Files\\...
0
votes
0answers
21 views

Hyper spectral data atmospheric correction

Can any one suggest how to customize 6S vector version for Hyper spectral data.I am using grass6.4.4 (which is a scalar version)for atmopsheric correction of multi spectral data.I have not seen ...
0
votes
0answers
38 views

Getting Error while installing grass extension

I want to install grass extension r.stream.order in my grass 7.But,while installing I am getting below error: g.extension -s extension=r.stream.distance url= Fetching ...
0
votes
0answers
327 views

How to activate GRASS 7 v2 in QGIS 2.18 on Mac

I have QGIS installed. I've ticked GRASS 7 in Plugins/Manage and Install plugins, but the Grass Tools options are all greyed out with No mapset is open reported. In the GRASS options the New Mapset ...
0
votes
0answers
79 views

How to write a command in shell script to install GRASS extension?

I have a script shell (UBUNTU 14.4) installing an environment for batch processing in PYTHON. It installs GRASS like this : echo ' installing PYTHON-GDAL ' echo '-------------------------------...