[GIS] How to use v.to.3d in GRASS GIS

grass

I am trying to use GRASS GIS for the first time.
After quite a lot of trouble I managed to create a location and a new mapset, and my shapefile is now displayed in the window "GRASS GIS Map Display" (for some reason only in 3d view).

My next step would be to use the v.to.3d module to add a value to the z-coordinate. I don't seem to get it right, first I tried to use "Search module", and when I found v.to.3d I doubleclicked and filled out the appearing form. That didn't work…
Then I tried writing it manually in the "Command console", but being a total GRASS GIS-beginner I'm not sure how to write? I get, or I think I get, that I need the command 'v.to.3d', an input, output and in some way add a height value.

Can someone please give me a hand? Exactly how can I do this?

Best Answer

Look at v.to.3d

1) You choose the original layer and the resulting layer:

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2) You can then use the name of the attribute column used for height field or a fixed height

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And the command to use in the shell is specified at the base of the dialog window:

v.to.3d input=your_layer output=resulting_layer column=your_column

or

v.to.3d input=your_layer output=resulting_layer height=your_value

Related Solutions

[GIS] How to use GRASS GIS in Python standalone

If you have already started GRASS interactively, and created a LOCATION/MAPSET, then try the full code example:from the wiki.

If you do not yet have your GRASS DB setup, and you want to try constructing a temporary location using python, then the next wiki section gives a working example.

Please try those complete examples, then post back if something does not work.

Edited:

You should not have to do any pip install grass. In the setup script are the lines:

# Set GISBASE environment variable
os.environ['GISBASE'] = gisbase
# define GRASS-Python environment
gpydir = os.path.join(gisbase, "etc", "python")
sys.path.append(gpydir)

If you have GRASS installed, that should take care of finding the GRASS python module grass.script. Can you double check that you are getting the paths correct, etc.??

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