[GRASS-user] Using g.extension in with rgrass7 in R

GRASS GRASS user
, ,
1

Hello,

I’m trying to use GRASS in RStudio using the ‘rgrass7’ pacakge.

So far I have:

library(rgrass7)

initGRASS(gisBase = “C:/OSGeo4W64/apps/grass/grass-7.3.svn”,
gisDbase = “C:/Sandbox/RGRASS/”,
location = “TEST”, mapset = “MAP1”,override=TRUE)

in.rast ← “C:/Users/James/Desktop/15m_site2/subset_output/15m_site2_subset_ortho.tif”

execGRASS(“r.in.gdal”, flags=“o”, parameters=list(input=in.rast, output=“ortho”))

Which works fine!

However, when I want to install an extension with:

execGRASS(“g.extension”, parameters=list(extension=“i.segment.uspo”, operation=“add”))

I get the following error:

Downloading precompiled GRASS Addons <i.segment.uspo>…
ERROR: Variable ‘LOCATION_NAME’ not set
ERROR: Variable ‘LOCATION_NAME’ not set
ERROR: Variable ‘LOCATION_NAME’ not set
Traceback (most recent call last):
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 1737, in
sys.exit(main())
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 1716, in main
install_extension(source=source, url=url, xmlurl=xmlurl)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 702, in install_extension
blist = install_extension_xml(xmlurl, mlist)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 922, in install_extension_xml
write_xml_modules(xml_file, tree)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 601, in write_xml_modules
libgis_revison = grass.version()[‘libgis_revision’]
KeyError: ‘libgis_revision’
Warning message:
running command ‘g.extension.bat extension=i.segment.uspo operation=add’ had status 1

Can anyone tell me where I have to set the ‘LOCATION_NAME’ please?

Kind regards

James

···

James Duffy
PhD Researcher
Environment and Sustainability Institute
Penryn Campus
University of Exeter
Penryn
Cornwall
TR10 9FE

2

Solved.

I found that closing RStudio and then installing GRASS extensions, and reopening RStudio afterwards solved the issue. Solution described here.

---------- Forwarded message ----------
From: James Duffy <james.philip.duffy@gmail.com>
Date: 3 May 2017 at 14:44
Subject: Using g.extension in with rgrass7 in R
To: grass-user <grass-user@lists.osgeo.org>

Hello,

I’m trying to use GRASS in RStudio using the ‘rgrass7’ pacakge.

So far I have:

library(rgrass7)

initGRASS(gisBase = “C:/OSGeo4W64/apps/grass/grass-7.3.svn”,
gisDbase = “C:/Sandbox/RGRASS/”,
location = “TEST”, mapset = “MAP1”,override=TRUE)

in.rast ← “C:/Users/James/Desktop/15m_site2/subset_output/15m_site2_subset_ortho.tif”

execGRASS(“r.in.gdal”, flags=“o”, parameters=list(input=in.rast, output=“ortho”))

Which works fine!

However, when I want to install an extension with:

execGRASS(“g.extension”, parameters=list(extension=“i.segment.uspo”, operation=“add”))

I get the following error:

Downloading precompiled GRASS Addons <i.segment.uspo>…
ERROR: Variable ‘LOCATION_NAME’ not set
ERROR: Variable ‘LOCATION_NAME’ not set
ERROR: Variable ‘LOCATION_NAME’ not set
Traceback (most recent call last):
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 1737, in
sys.exit(main())
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 1716, in main
install_extension(source=source, url=url, xmlurl=xmlurl)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 702, in install_extension
blist = install_extension_xml(xmlurl, mlist)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 922, in install_extension_xml
write_xml_modules(xml_file, tree)
File “C:/OSGeo4W64/apps/grass/grass-7.3.svn/scripts/g.extension.py”, line 601, in write_xml_modules
libgis_revison = grass.version()[‘libgis_revision’]
KeyError: ‘libgis_revision’
Warning message:
running command ‘g.extension.bat extension=i.segment.uspo operation=add’ had status 1

Can anyone tell me where I have to set the ‘LOCATION_NAME’ please?

Kind regards

James

–

James Duffy
PhD Researcher
Environment and Sustainability Institute
Penryn Campus
University of Exeter
Penryn
Cornwall
TR10 9FE

–

James Duffy
PhD Researcher
Environment and Sustainability Institute
Penryn Campus
University of Exeter
Penryn
Cornwall
TR10 9FE