[GRASS-user] Creating a png file with multiple vector maps

[Chris Bartolomei]

 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 <hellik at 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 at data

d.vect map=x006441899_100_VGD_AT at data fill_color=192:192:192:255 width=1
d.vect map=x006441899_100_VGD_BL at data color=0:0:0:255 fill_color=128:255:0:255 width=1
d.vect map=x006441899_100_VGD_PG at 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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