For what is worth,
I have asked for help or commented maybe on this or similar subjects in
the past.
It is for years now that the PNG driver does not work for vector maps
(for me)
from the command line. I have tried various terminals but I still have
no clear idea what the problem is. The only way I manage to render
vector maps (even multiple ones, rendering on the same file) is using
the BMP file format.
Here are my 'GRASS GIS display driver' related settings:
https://gitlab.com/NikosAlexandris/tygrass/-/blob/6a0e13310c4a7a086dc74ee6c61c2fa467881a85/.grass.render
(BMP set here for vector maps:
https://gitlab.com/NikosAlexandris/tygrass/-/blob/6a0e13310c4a7a086dc74ee6c61c2fa467881a85/.grass.render#L22).
My custom functions to render vector maps are `tyvector` and
`tyvector.add` defined in:
https://gitlab.com/NikosAlexandris/tygrass/-/blob/6a0e13310c4a7a086dc74ee6c61c2fa467881a85/.grass.tygrass.vector
If you take out the `tycat` part that prints an image in the terminal,
then the rest of the steps render a vector map in a new file or render
on top of an existing file.
Various helper functions to (re-)set display driver parameters here:
https://gitlab.com/NikosAlexandris/tygrass/-/blob/6a0e13310c4a7a086dc74ee6c61c2fa467881a85/.grass.tygrass.helpers
Maybe this is useful, Nikos
---
On 2021-03-22 00:30, Chris Bartolomei via grass-user wrote:
Thanks Helmut - that's exactly what I'm looking for. It's really
strange that it isn't working on our cluster but I'm back in the office
tomorrow so I'll try it again, carefully copying the variables as you
have them set.
Thanks again for all the support you give everyone!
:)
Chris
On Sunday, March 21, 2021, 3:40:51 PM EDT, Helmut Kudrnovsky
<hel...@web.de> wrote:
Helmut ... thank you for your example however I think there is a
misunderstanding of what I am trying to do.
I am using >GRASS on Linux (on a cluster) and the issue I am
experiencing is overlaying two polygon maps (layers in Arc-speak).
Points and lines on top of ONE set of polygons works fine as you have
shown, however using two or more polygon maps
(layers) does not seem to work. I attached an example of what i am
trying to achieve: Take for instance a polygon
representing Italy and you wanted it colored dark gray, then you want
to overlay on top of that an administrative map
showing only the areas of Lazio and Liguria colored in blue but no
other administrative areas. The result would look
like the Italy_sample.png file i attached (I made is using ArcPro as i
am not in the office with access to our cluster).
This is what is not working using the d.mon=png, d.vect tools. Could
you please try something similar and see if it works for you (on
linux)?
I'm not on linux, though I think it works there too.
testing here in with winGRASS 7.8.5 and overlaping vector polygon
layers by following commands:
---------------
REM start of the batch file
set GRASS_RENDER_IMMEDIATE=png
set GRASS_RENDER_WIDTH=640
set GRASS_RENDER_HEIGHT=480
set GRASS_RENDER_TRANSPARENT=true
set GRASS_RENDER_TRUECOLOR=true
set GRASS_RENDER_FILE_COMPRESSION=9
set GRASS_MESSAGE_FORMAT=plain
set GRASS_RENDER_FILE_READ=TRUE
g.region vector=x006441899_100_VGD_AT@data
d.vect map=x006441899_100_VGD_AT@data fill_color=192:192:192:255
width=1
d.vect map=x006441899_100_VGD_BL@data color=0:0:0:255
fill_color=128:255:0:255 width=1
d.vect map=x006441899_100_VGD_PG@data color=255:0:0:255
fill_color=0:0:255:255 width=2
REM end of the batch file
---------------
see attached file, overlaying several polygones works here.
maybe others can test it on linux.
kind regards
Helmut
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