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

[Chris Bartolomei via grass-user]

 Thanks Nikos! I'll try that way too:)
Chris
On Monday, March 22, 2021, 5:23:11 AM EDT,  
wrote:  
 
 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 
>  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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Re: [GRASS-user] Creating a png file with multiple vector maps

[nik]

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

[Chris Bartolomei via grass-user]

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

[Helmut Kudrnovsky]

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

[Moritz Lennert]

Hi Chris,

In your previous message the settings you used had a lot of MS Windows paths in 
them, that's why I thought you used that. If you're not on Windows then these 
settings are wrong and this might explain your problem. Here's what you sent:

GRASS 7.8.4> env | grep GRASS
MANPATH=C:\OSGEO4~1\apps\grass\grass78\docs\man;C:\Users\Chris\AppData\Roaming\GRASS7\addons\docs\man
GRASS_PYTHON=C:\OSGEO4~1\bin\python3.exe
GRASS_RENDER_TRANSPARENCY=true
GRASS_PAGER=more
GRASS_GNUPLOT=gnuplot -persist
GRASS_RENDER_PNG_COMPRESSION=0
GRASS_RENDER_FILE_COMPRESSION=0
GRASSBIN=C:\OSGEO4~1\apps\grass\grass78\bin
GRASS_RENDER_FILE=test.png
GRASS_SH=C:\OSGEO4~1\apps\msys\bin\sh.exe
GRASS_RENDER_HEIGHT=480
PATH=/c/OSGEO4~1/apps/grass/grass78/lib:/c/OSGEO4~1/apps/grass/grass78/bin:/c/Users/Chris/AppData/Roaming/GRASS7/addons/bin:/c/OSGEO4~1/apps/Python37:/c/OSGEO4~1/apps/Python37/Scripts:/c/OSGEO4~1/apps/Python27/Scripts:/c/OSGEO4~1/bin:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/system32/WBem:/usr/bin:/c/Program
 
Files/RStudio/bin:/c/OSGEO4~1/apps/grass/grass78/bin:/c/OSGEO4~1/apps/grass/grass78/scripts:/c/OSGEO4~1/apps/grass/grass78/lib:.:/c/OSGEO4~1/apps/Python37/lib/site-packages/pywin32_system32
GRASS_MESSAGE_FORMAT=plain
GRASS_PROJSHARE=C:\OSGEO4~1\share\proj
PS1=GRASS 7.8.4>
GRASS_VERSION=7.8.4
GRASS_HTML_BROWSER=start
GRASS_RENDER_WIDTH=640
GRASS_RENDER_TRUECOLOR=true
GRASS_RENDER_IMMEDIATE=png
GRASS_ADDON_BASE=C:\Users\Chris\AppData\Roaming\GRASS7\addons
GRASS_RENDER_FILE_READ=true


All the C:\ paths indicate Windows.

Moritz

Am 11. März 2021 21:37:01 MEZ schrieb Chris Bartolomei :
> 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)?v/rChris
> 
>
>On Tuesday, March 2, 2021, 2:38:45 PM EST, Helmut Kudrnovsky 
>  wrote:  
> 
> >I don't see anything immediately wrong. Maybe it is a specific MS
>>Windows issue I cannot reproduce here in GNU/Linux.
>>
>>@Helmut any ideas ?
>
>tested here in the following way in OSGeo4W-winGRASS 7.8.5
>
>(1) changing the working directory via GUI > change working directory
> 
> cd "D:\temp\testgrassrender"                                                  
>  
>Working directory changed to:                                                  
>"D:\temp\testgrassrender"
>
>(2) in OSgeo4W-winGRASS-windows console (no msys needed!), also change here to 
>the new wd:
>
>C:\>cd D:\temp\testgrassrender
>C:\>d:
>
>(3) put the variables and d.-commands into a bat-file into the working 
>directory (D:\temp\testgrassrender\mytest.bat):
>
>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=0
>set GRASS_MESSAGE_FORMAT=plain
>set GRASS_RENDER_FILE_READ=TRUE
>
>g.region vect=census_wake2000
>d.vect map=census_wake2000 fill_color=none
>d.vect map=roadsmajor color=255:0:0:255
>d.vect map=schools_wake fill_color=0:128:0:255 icon=basic/circle size=10
>
>REM end of the batch file
>
>=> see here: in order to set a variable in the windows world, use e.g. set 
>GRASS_RENDER_IMMEDIATE=png instead if export GRASS_RENDER_IMMEDIATE=png in the 
>*nix world
>
>(4) start your batch file in the windows command line:
>
>D:\temp\testgrassrender>mytest.bat
>
>D:\temp\testgrassrender>set GRASS_RENDER_IMMEDIATE=png
>D:\temp\testgrassrender>set GRASS_RENDER_WIDTH=640
>D:\temp\testgrassrender>set GRASS_RENDER_HEIGHT=480
>D:\temp\testgrassrender>set GRASS_RENDER_TRANSPARENT=true
>D:\temp\testgrassrender>set GRASS_RENDER_TRUECOLOR=true
>D:\temp\testgrassrender>set GRASS_RENDER_FILE_COMPRESSION=0
>D:\temp\testgrassrender>set GRASS_MESSAGE_FORMAT=plain
>D:\temp\testgrassrender>set GRASS_RENDER_FILE_READ=TRUE
>D:\temp\testgrassrender>g.region vect=census_wake2000
>D:\temp\testgrassrender>d.vect map=census_wake2000 fill_color=none
>d.vect komplett.
>
>D:\temp\testgrassrender>d.vect map=roadsmajor color=255:0:0:255
>d.vect komplett.
>
>D:\temp\testgrassrender>d.vect map=schools_wake fill_color=0:128:0:255 

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

[Chris Bartolomei via grass-user]

 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)?v/rChris
 

On Tuesday, March 2, 2021, 2:38:45 PM EST, Helmut Kudrnovsky 
 wrote:  
 
 >I don't see anything immediately wrong. Maybe it is a specific MS
>Windows issue I cannot reproduce here in GNU/Linux.
>
>@Helmut any ideas ?

tested here in the following way in OSGeo4W-winGRASS 7.8.5

(1) changing the working directory via GUI > change working directory
 
 cd "D:\temp\testgrassrender"                                                   
 
Working directory changed to:                                                  
"D:\temp\testgrassrender"

(2) in OSgeo4W-winGRASS-windows console (no msys needed!), also change here to 
the new wd:

C:\>cd D:\temp\testgrassrender
C:\>d:

(3) put the variables and d.-commands into a bat-file into the working 
directory (D:\temp\testgrassrender\mytest.bat):

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=0
set GRASS_MESSAGE_FORMAT=plain
set GRASS_RENDER_FILE_READ=TRUE

g.region vect=census_wake2000
d.vect map=census_wake2000 fill_color=none
d.vect map=roadsmajor color=255:0:0:255
d.vect map=schools_wake fill_color=0:128:0:255 icon=basic/circle size=10

REM end of the batch file

=> see here: in order to set a variable in the windows world, use e.g. set 
GRASS_RENDER_IMMEDIATE=png instead if export GRASS_RENDER_IMMEDIATE=png in the 
*nix world

(4) start your batch file in the windows command line:

D:\temp\testgrassrender>mytest.bat

D:\temp\testgrassrender>set GRASS_RENDER_IMMEDIATE=png
D:\temp\testgrassrender>set GRASS_RENDER_WIDTH=640
D:\temp\testgrassrender>set GRASS_RENDER_HEIGHT=480
D:\temp\testgrassrender>set GRASS_RENDER_TRANSPARENT=true
D:\temp\testgrassrender>set GRASS_RENDER_TRUECOLOR=true
D:\temp\testgrassrender>set GRASS_RENDER_FILE_COMPRESSION=0
D:\temp\testgrassrender>set GRASS_MESSAGE_FORMAT=plain
D:\temp\testgrassrender>set GRASS_RENDER_FILE_READ=TRUE
D:\temp\testgrassrender>g.region vect=census_wake2000
D:\temp\testgrassrender>d.vect map=census_wake2000 fill_color=none
d.vect komplett.

D:\temp\testgrassrender>d.vect map=roadsmajor color=255:0:0:255
d.vect komplett.

D:\temp\testgrassrender>d.vect map=schools_wake fill_color=0:128:0:255 
icon=basic/circle size=10
d.vect komplett.

(5) see attached the result png - it looks like the same as Moritz's example

kind regards
Helmut
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Re: [GRASS-user] Creating a png file with multiple vector maps

[Helmut Kudrnovsky]

>I don't see anything immediately wrong. Maybe it is a specific MS
>Windows issue I cannot reproduce here in GNU/Linux.
>
>@Helmut any ideas ?

tested here in the following way in OSGeo4W-winGRASS 7.8.5

(1) changing the working directory via GUI > change working directory
 
 cd "D:\temp\testgrassrender"   
 
Working directory changed to:   
"D:\temp\testgrassrender"

(2) in OSgeo4W-winGRASS-windows console (no msys needed!), also change here to 
the new wd:

C:\>cd D:\temp\testgrassrender
C:\>d:

(3) put the variables and d.-commands into a bat-file into the working 
directory (D:\temp\testgrassrender\mytest.bat):

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=0
set GRASS_MESSAGE_FORMAT=plain
set GRASS_RENDER_FILE_READ=TRUE

g.region vect=census_wake2000
d.vect map=census_wake2000 fill_color=none
d.vect map=roadsmajor color=255:0:0:255
d.vect map=schools_wake fill_color=0:128:0:255 icon=basic/circle size=10

REM end of the batch file

=> see here: in order to set a variable in the windows world, use e.g. set 
GRASS_RENDER_IMMEDIATE=png instead if export GRASS_RENDER_IMMEDIATE=png in the 
*nix world

(4) start your batch file in the windows command line:

D:\temp\testgrassrender>mytest.bat

D:\temp\testgrassrender>set GRASS_RENDER_IMMEDIATE=png
D:\temp\testgrassrender>set GRASS_RENDER_WIDTH=640
D:\temp\testgrassrender>set GRASS_RENDER_HEIGHT=480
D:\temp\testgrassrender>set GRASS_RENDER_TRANSPARENT=true
D:\temp\testgrassrender>set GRASS_RENDER_TRUECOLOR=true
D:\temp\testgrassrender>set GRASS_RENDER_FILE_COMPRESSION=0
D:\temp\testgrassrender>set GRASS_MESSAGE_FORMAT=plain
D:\temp\testgrassrender>set GRASS_RENDER_FILE_READ=TRUE
D:\temp\testgrassrender>g.region vect=census_wake2000
D:\temp\testgrassrender>d.vect map=census_wake2000 fill_color=none
d.vect komplett.

D:\temp\testgrassrender>d.vect map=roadsmajor color=255:0:0:255
d.vect komplett.

D:\temp\testgrassrender>d.vect map=schools_wake fill_color=0:128:0:255 
icon=basic/circle size=10
d.vect komplett.

(5) see attached the result png - it looks like the same as Moritz's example

kind regards
Helmut
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Re: [GRASS-user] Creating a png file with multiple vector maps

[Moritz Lennert]

Sorry, Chris, I lost this out of my sight.

I don't see anything immediately wrong. Maybe it is a specific MS 
Windows issue I cannot reproduce here in GNU/Linux.


@Helmut any ideas ?

Moritz

On 17/02/21 19:17, Chris Bartolomei wrote:

Good afternoon Moritz - thank you for the feedback :)
I've been able to get GRASS 7.8 running with msys on my pc so I can send 
images etc. now... I tried repeating what I had done at work and I have 
the same results ... I also downloaded the Spearfish dataset as you 
suggested and brought in the boundary_county vector. I can go into 
Properties and fill color orange and outline gray, but I go to the 
console and do the d.vect map=boundary_county color=red 
fill_color=orange and all I get is the red boundaries.I attached an 
image of everything ... the Layer Manager, the Display window, the msys 
console window with my commands run and all my exported GRASS variables, 
and the resultant png image.
I've tried this with several other polygon vector files and I get the 
same darn thing.  Can you see anything wrong with my variable settings ?


GRASS 7.8.4> v.info -t boundary_county@WarningPoints #from the Spearfish 
dataset

nodes=1114
points=0
lines=0
boundaries=1910
centroids=926
areas=926
islands=130
primitives=2836
map3d=0

GRASS 7.8.4> env | grep GRASS
MANPATH=C:\OSGEO4~1\apps\grass\grass78\docs\man;C:\Users\Chris\AppData\Roaming\GRASS7\addons\docs\man
GRASS_PYTHON=C:\OSGEO4~1\bin\python3.exe
GRASS_RENDER_TRANSPARENCY=true
GRASS_PAGER=more
GRASS_GNUPLOT=gnuplot -persist
GRASS_RENDER_PNG_COMPRESSION=0
GRASS_RENDER_FILE_COMPRESSION=0
GRASSBIN=C:\OSGEO4~1\apps\grass\grass78\bin
GRASS_RENDER_FILE=test.png
GRASS_SH=C:\OSGEO4~1\apps\msys\bin\sh.exe
GRASS_RENDER_HEIGHT=480
PATH=/c/OSGEO4~1/apps/grass/grass78/lib:/c/OSGEO4~1/apps/grass/grass78/bin:/c/Users/Chris/AppData/Roaming/GRASS7/addons/bin:/c/OSGEO4~1/apps/Python37:/c/OSGEO4~1/apps/Python37/Scripts:/c/OSGEO4~1/apps/Python27/Scripts:/c/OSGEO4~1/bin:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/system32/WBem:/usr/bin:/c/Program 
Files/RStudio/bin:/c/OSGEO4~1/apps/grass/grass78/bin:/c/OSGEO4~1/apps/grass/grass78/scripts:/c/OSGEO4~1/apps/grass/grass78/lib:.:/c/OSGEO4~1/apps/Python37/lib/site-packages/pywin32_system32

GRASS_MESSAGE_FORMAT=plain
GRASS_PROJSHARE=C:\OSGEO4~1\share\proj
PS1=GRASS 7.8.4>
GRASS_VERSION=7.8.4
GRASS_HTML_BROWSER=start
GRASS_RENDER_WIDTH=640
GRASS_RENDER_TRUECOLOR=true
GRASS_RENDER_IMMEDIATE=png
GRASS_ADDON_BASE=C:\Users\Chris\AppData\Roaming\GRASS7\addons
GRASS_RENDER_FILE_READ=true

GRASS 7.8.4> d.vect map=boundary_county@WarningPoints color=red 
fill_color=orange

d.vect complete.
GRASS 7.8.4>

Thanks again ... and sorry to bother you so much!
:)
Chris


On Wednesday, February 17, 2021, 7:57:08 AM EST, Moritz Lennert 
 wrote:



Hi Chris,

On 17/02/21 02:30, Chris Bartolomei wrote:
 > Oh !! Sooo close ! I can get the two vector maps to overlay and
 > display but no matter what I do I cannot get them to do a color fill ...
 > ugh ... fill_color does nothing. I can use "d.vect map=admin_area
 > color=red" and the boundaries change to red, but "d.vect map=admin_area
 > color=black fill_color=red" and i do not get any filled color. So
 > frustrating. I thought maybe my shapefile imported as just a boundary
 > but when I do a "v.category input=admin_area option=report" I get:
 > Layer/table 1/admin_area
 > type count    min    max
 > point    0    0 0
 > line      0    0 0
 > boundary    0    0 0
 > centroid 59       1        25
 > area             0    0 0
 > face             0    0 0
 > kernel      0    0 0
 > all           59    1    25
 >
 > Should I have areas in there too ??

I'm not really sure what 'area' in the output of v.category actually
refers to, as areas cannot have categories in GRASS GIS.

In order to see if you have areas in your file, check with v.info:

 > I wonder if the import went wonky what is strange is that the ps.map
 > tool fills the polygons just fine.
 > Moritz - could please I ask you to do a v.category on one of your vector
 > maps (v.category input=censuslbk_wwake@PERMANENT 
 option=report) and see

 > if it has areas in it or just centroids like I have?

GRASS 7.8.5 (nc_spm_08_grass7):~ > v.info -t boundary_county
nodes=1114
points=0
lines=0
boundaries=1910
centroids=926
areas=926
islands=130
primitives=2836
map3d=0

but

 >v.category boundary_county op=report
Layer/table: 1/boundary_county
type      count        min        max
point          0          0          0
line          0          0          0
boundary      0          0          0
centroid    926          1        926
area          0          0          0
face          0          0          0
kernel        0          0          0
all          926          1        926


In order to find 

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

[Moritz Lennert]

Hi Chris,

On 17/02/21 02:30, Chris Bartolomei wrote:
Oh !! Sooo close ! I can get the two vector maps to overlay and 
display but no matter what I do I cannot get them to do a color fill ... 
ugh ... fill_color does nothing. I can use "d.vect map=admin_area 
color=red" and the boundaries change to red, but "d.vect map=admin_area 
color=black fill_color=red" and i do not get any filled color. So 
frustrating. I thought maybe my shapefile imported as just a boundary 
but when I do a "v.category input=admin_area option=report" I get:

Layer/table 1/admin_area
type count    min    max
point    0    0 0
line      0    0 0
boundary    0    0 0
centroid 59       1        25
area             0    0 0
face             0    0 0
kernel      0    0 0
all           59    1    25

Should I have areas in there too ??


I'm not really sure what 'area' in the output of v.category actually 
refers to, as areas cannot have categories in GRASS GIS.


In order to see if you have areas in your file, check with v.info:

I wonder if the import went wonky what is strange is that the ps.map 
tool fills the polygons just fine.
Moritz - could please I ask you to do a v.category on one of your vector 
maps (v.category input=censuslbk_wwake@PERMANENT option=report) and see 
if it has areas in it or just centroids like I have?


GRASS 7.8.5 (nc_spm_08_grass7):~ > v.info -t boundary_county
nodes=1114
points=0
lines=0
boundaries=1910
centroids=926
areas=926
islands=130
primitives=2836
map3d=0

but

>v.category boundary_county op=report
Layer/table: 1/boundary_county
type   countminmax
point  0  0  0
line   0  0  0
boundary   0  0  0
centroid 926  1926
area   0  0  0
face   0  0  0
kernel 0  0  0
all  926  1926


In order to find out if the issue comes from your data or from your 
installation of GRASS GIS, you can also download the NC demo data set 
from https://grass.osgeo.org/download/data/#NorthCarolinaDataset and try 
to reproduce what I did in order to see if it works.


Moritz

On Tuesday, February 16, 2021, 11:20:31 AM EST, Chris Bartolomei 
 wrote:



Well - that does indeed work for you.  I'll try your settings when I get 
into the office - we're running GRASS on a RHEL 7 cluster - and see what 
I can come up with.

It would be sooo much better if it worked like yours did!
Thank you so much for taking the time and testing this out
:)
v/r
Chris

On Tuesday, February 16, 2021, 11:07:10 AM EST, Moritz Lennert 
 wrote:



On 16/02/21 15:54, Chris Bartolomei wrote:
 > Mortiz - are those vector layers areas ? I'm guessing the census is an
 > area, the roads are lines and the schools are points, yes?  I'm having
 > an issue overlaying two area maps (polygons). i can only get one to show
 > ... I have tried your method with all the export GRASS_RENDER* variables
 > but I have a country polygon map as the bottom later and a selection of
 > a few administrative areas (provinces/states) as the top map and I can
 > only get one or the other to show up. It almost seems as if the
 > transparency doesn't work and what should be transparent in the admin
 > map is actually the background color and blocks the country from 
being seen.

 > Could you please try your method with a couple area (polygon) vector
 > maps overlaying each other?

export GRASS_RENDER_IMMEDIATE=png
export GRASS_RENDER_WIDTH=640
export GRASS_RENDER_HEIGHT=480
export GRASS_RENDER_TRUECOLOR=true
export GRASS_RENDER_FILE_COMPRESSION=0
export GRASS_MESSAGE_FORMAT=plain
export GRASS_RENDER_FILE_READ=TRUE
export GRASS_RENDER_FILE=$HOME/test.png

g.region vect=census_wake2000
d.vect map=census_wake2000@PERMANENT  
fill_color=grey
d.vect map=censusblk_swwake@PERMANENT 
 fill_color=red


I've tried with

export GRASS_RENDER_TRANSPARENT=TRUE
and
export GRASS_RENDER_TRANSPARENT=FALSE

As you can see in the attached images, the overlay seems to work without
any issues (or I don't understand what you are looking for exactly) and
setting GRASS_RENDER_TRANSPARENT decides on whether the background
should be transparent or not.

A second test in the same data set, but with different layers:

export GRASS_RENDER_TRANSPARENT=TRUE
export GRASS_RENDER_FILE=$HOME/test_NC_TRUE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT 
d.vect map=boundary_municp@PERMANENT  
fill_color=255:255:0:255


export GRASS_RENDER_TRANSPARENT=FALSE
export GRASS_RENDER_FILE=$HOME/test_NC_FALSE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT 

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

[Chris Bartolomei via grass-user]

 Oh !! Sooo close ! I can get the two vector maps to overlay and 
display but no matter what I do I cannot get them to do a color fill ... ugh 
... fill_color does nothing. I can use "d.vect map=admin_area color=red" and 
the boundaries change to red, but "d.vect map=admin_area color=black 
fill_color=red" and i do not get any filled color. So frustrating. I thought 
maybe my shapefile imported as just a boundary but when I do a "v.category 
input=admin_area option=report" I get:Layer/table 1/admin_areatype 
count    min    maxpoint    0    0 0
line      0    0 0boundary    0    0
 0centroid 59       1        25area             0   
 0 0face             0    0 0kernel     
 0    0 0all           59    1    25

Should I have areas in there too ??I wonder if the import went wonky what 
is strange is that the ps.map tool fills the polygons just fine.
Moritz - could please I ask you to do a v.category on one of your vector maps 
(v.category input=censuslbk_wwake@PERMANENT option=report) and see if it has 
areas in it or just centroids like I have?
Thanks again for the help!:)
Chris

On Tuesday, February 16, 2021, 11:20:31 AM EST, Chris Bartolomei 
 wrote:  
 
  Well - that does indeed work for you.  I'll try your settings when I get into 
the office - we're running GRASS on a RHEL 7 cluster - and see what I can come 
up with.It would be sooo much better if it worked like yours did!Thank you so 
much for taking the time and testing this out:)v/rChris

On Tuesday, February 16, 2021, 11:07:10 AM EST, Moritz Lennert 
 wrote:  
 
 On 16/02/21 15:54, Chris Bartolomei wrote:
> Mortiz - are those vector layers areas ? I'm guessing the census is an 
> area, the roads are lines and the schools are points, yes?  I'm having 
> an issue overlaying two area maps (polygons). i can only get one to show 
> ... I have tried your method with all the export GRASS_RENDER* variables 
> but I have a country polygon map as the bottom later and a selection of 
> a few administrative areas (provinces/states) as the top map and I can 
> only get one or the other to show up. It almost seems as if the 
> transparency doesn't work and what should be transparent in the admin 
> map is actually the background color and blocks the country from being seen.
> Could you please try your method with a couple area (polygon) vector 
> maps overlaying each other?

export GRASS_RENDER_IMMEDIATE=png
export GRASS_RENDER_WIDTH=640
export GRASS_RENDER_HEIGHT=480
export GRASS_RENDER_TRUECOLOR=true
export GRASS_RENDER_FILE_COMPRESSION=0
export GRASS_MESSAGE_FORMAT=plain
export GRASS_RENDER_FILE_READ=TRUE
export GRASS_RENDER_FILE=$HOME/test.png

g.region vect=census_wake2000
d.vect map=census_wake2000@PERMANENT fill_color=grey
d.vect map=censusblk_swwake@PERMANENT fill_color=red

I've tried with

export GRASS_RENDER_TRANSPARENT=TRUE
and
export GRASS_RENDER_TRANSPARENT=FALSE

As you can see in the attached images, the overlay seems to work without 
any issues (or I don't understand what you are looking for exactly) and 
setting GRASS_RENDER_TRANSPARENT decides on whether the background 
should be transparent or not.

A second test in the same data set, but with different layers:

export GRASS_RENDER_TRANSPARENT=TRUE
export GRASS_RENDER_FILE=$HOME/test_NC_TRUE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT
d.vect map=boundary_municp@PERMANENT fill_color=255:255:0:255

export GRASS_RENDER_TRANSPARENT=FALSE
export GRASS_RENDER_FILE=$HOME/test_NC_FALSE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT
d.vect map=boundary_municp@PERMANENT fill_color=255:255:0:255

Again, the overlay works, at least as I would have expected.

Moritz

> On Tuesday, February 16, 2021, 4:19:16 AM EST, Moritz Lennert 
>  wrote:
> 
> 
> Hi Chris,
> 
> For me, the following works with the current stable GRASS GIS (7.8.5)
> and using maps from the NC demo data set:
> 
> export GRASS_RENDER_IMMEDIATE=png
> export GRASS_RENDER_WIDTH=640
> export GRASS_RENDER_HEIGHT=480
> export GRASS_RENDER_TRANSPARENT=true
> export GRASS_RENDER_TRUECOLOR=true
> export GRASS_RENDER_FILE_COMPRESSION=0
> export GRASS_MESSAGE_FORMAT=plain
> export GRASS_RENDER_FILE_READ=TRUE
> 
> g.region vect=census_wake2000
> d.vect map=census_wake2000@PERMANENT  
> fill_color=none
> d.vect map=roadsmajor@PERMANENT  
> color=255:0:0:255
> d.vect map=schools_wake@PERMANENT  
> fill_color=0:128:0:255
> icon=basic/circle size=10
> 
> I attach a small thumbnail of the resulting PNG file.
> 
> Moritz
> 
> 
> On 11/02/21 18:54, Chris Bartolomei via grass-user wrote:
>  > Good morning Anna,
>  > It took quite a while of trial and error but I worked out a method that
>  > kindof works:
>  > 

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

[Chris Bartolomei via grass-user]

 Well - that does indeed work for you.  I'll try your settings when I get into 
the office - we're running GRASS on a RHEL 7 cluster - and see what I can come 
up with.It would be sooo much better if it worked like yours did!Thank you so 
much for taking the time and testing this out:)v/rChris

On Tuesday, February 16, 2021, 11:07:10 AM EST, Moritz Lennert 
 wrote:  
 
 On 16/02/21 15:54, Chris Bartolomei wrote:
> Mortiz - are those vector layers areas ? I'm guessing the census is an 
> area, the roads are lines and the schools are points, yes?  I'm having 
> an issue overlaying two area maps (polygons). i can only get one to show 
> ... I have tried your method with all the export GRASS_RENDER* variables 
> but I have a country polygon map as the bottom later and a selection of 
> a few administrative areas (provinces/states) as the top map and I can 
> only get one or the other to show up. It almost seems as if the 
> transparency doesn't work and what should be transparent in the admin 
> map is actually the background color and blocks the country from being seen.
> Could you please try your method with a couple area (polygon) vector 
> maps overlaying each other?

export GRASS_RENDER_IMMEDIATE=png
export GRASS_RENDER_WIDTH=640
export GRASS_RENDER_HEIGHT=480
export GRASS_RENDER_TRUECOLOR=true
export GRASS_RENDER_FILE_COMPRESSION=0
export GRASS_MESSAGE_FORMAT=plain
export GRASS_RENDER_FILE_READ=TRUE
export GRASS_RENDER_FILE=$HOME/test.png

g.region vect=census_wake2000
d.vect map=census_wake2000@PERMANENT fill_color=grey
d.vect map=censusblk_swwake@PERMANENT fill_color=red

I've tried with

export GRASS_RENDER_TRANSPARENT=TRUE
and
export GRASS_RENDER_TRANSPARENT=FALSE

As you can see in the attached images, the overlay seems to work without 
any issues (or I don't understand what you are looking for exactly) and 
setting GRASS_RENDER_TRANSPARENT decides on whether the background 
should be transparent or not.

A second test in the same data set, but with different layers:

export GRASS_RENDER_TRANSPARENT=TRUE
export GRASS_RENDER_FILE=$HOME/test_NC_TRUE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT
d.vect map=boundary_municp@PERMANENT fill_color=255:255:0:255

export GRASS_RENDER_TRANSPARENT=FALSE
export GRASS_RENDER_FILE=$HOME/test_NC_FALSE.png
g.region vect=boundary_county
d.vect map=boundary_county@PERMANENT
d.vect map=boundary_municp@PERMANENT fill_color=255:255:0:255

Again, the overlay works, at least as I would have expected.

Moritz

> On Tuesday, February 16, 2021, 4:19:16 AM EST, Moritz Lennert 
>  wrote:
> 
> 
> Hi Chris,
> 
> For me, the following works with the current stable GRASS GIS (7.8.5)
> and using maps from the NC demo data set:
> 
> export GRASS_RENDER_IMMEDIATE=png
> export GRASS_RENDER_WIDTH=640
> export GRASS_RENDER_HEIGHT=480
> export GRASS_RENDER_TRANSPARENT=true
> export GRASS_RENDER_TRUECOLOR=true
> export GRASS_RENDER_FILE_COMPRESSION=0
> export GRASS_MESSAGE_FORMAT=plain
> export GRASS_RENDER_FILE_READ=TRUE
> 
> g.region vect=census_wake2000
> d.vect map=census_wake2000@PERMANENT  
> fill_color=none
> d.vect map=roadsmajor@PERMANENT  
> color=255:0:0:255
> d.vect map=schools_wake@PERMANENT  
> fill_color=0:128:0:255
> icon=basic/circle size=10
> 
> I attach a small thumbnail of the resulting PNG file.
> 
> Moritz
> 
> 
> On 11/02/21 18:54, Chris Bartolomei via grass-user wrote:
>  > Good morning Anna,
>  > It took quite a while of trial and error but I worked out a method that
>  > kindof works:
>  > First off - unless someone says otherwise, you can't use the PNG driver
>  > (d.mon) method to overlay more than one polygon vector. Sorry - it just
>  > doesn't work. You CAN use the ps.map method - that works really well
>  > generating the image however it by default assumes you are printing on
>  > an A4 piece of paper so there's all sorts of white space.  The image is
>  > centered at the top of this fictional piece of paper. In your postscript
>  > rules file you can use the "maploc" command to position the image
>  > elsewhere on the page. This is necessary because the next trick changes
>  > the paper dimensions but it assumes the origin is the lower left corner
>  > and therefore clips anything that is above the new dimensions. Back to
>  > postscript commands in the rules file first though ... the ps.map maploc
>  > command uses inches (why?? it should be points) so an A4 page is 8.27" x
>  > 11.69" points are 1/72 of an inch thus 595p x 842p - it also has a
>  > default 36p margin (0.5 inch). You'll need those numbers later. maploc
>  > also lets you set the size of your image box:  maploc {x offset from
>  > left edge} {y offset from top} {width of box} {height of box} Note: this
>  > is all done via a BASH script with GRASS 7.4 on Linux (RHEL 7), not
>  > python. This is my postscript rules file:
>  >
>  > maploc 0.1 6.815 6.5 4.875 #468p x 

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

[Chris Bartolomei via grass-user]

 Mortiz - are those vector layers areas ? I'm guessing the census is an area, 
the roads are lines and the schools are points, yes?  I'm having an issue 
overlaying two area maps (polygons). i can only get one to show ... I have 
tried your method with all the export GRASS_RENDER* variables but I have a 
country polygon map as the bottom later and a selection of a few administrative 
areas (provinces/states) as the top map and I can only get one or the other to 
show up. It almost seems as if the transparency doesn't work and what should be 
transparent in the admin map is actually the background color and blocks the 
country from being seen.Could you please try your method with a couple area 
(polygon) vector maps overlaying each other?Thanks!:)
Chris
On Tuesday, February 16, 2021, 4:19:16 AM EST, Moritz Lennert 
 wrote:  
 
 Hi Chris,

For me, the following works with the current stable GRASS GIS (7.8.5) 
and using maps from the NC demo data set:

export GRASS_RENDER_IMMEDIATE=png
export GRASS_RENDER_WIDTH=640
export GRASS_RENDER_HEIGHT=480
export GRASS_RENDER_TRANSPARENT=true
export GRASS_RENDER_TRUECOLOR=true
export GRASS_RENDER_FILE_COMPRESSION=0
export GRASS_MESSAGE_FORMAT=plain
export GRASS_RENDER_FILE_READ=TRUE

g.region vect=census_wake2000
d.vect map=census_wake2000@PERMANENT fill_color=none
d.vect map=roadsmajor@PERMANENT color=255:0:0:255
d.vect map=schools_wake@PERMANENT fill_color=0:128:0:255 
icon=basic/circle size=10

I attach a small thumbnail of the resulting PNG file.

Moritz


On 11/02/21 18:54, Chris Bartolomei via grass-user wrote:
> Good morning Anna,
> It took quite a while of trial and error but I worked out a method that 
> kindof works:
> First off - unless someone says otherwise, you can't use the PNG driver 
> (d.mon) method to overlay more than one polygon vector. Sorry - it just 
> doesn't work. You CAN use the ps.map method - that works really well 
> generating the image however it by default assumes you are printing on 
> an A4 piece of paper so there's all sorts of white space.  The image is 
> centered at the top of this fictional piece of paper. In your postscript 
> rules file you can use the "maploc" command to position the image 
> elsewhere on the page. This is necessary because the next trick changes 
> the paper dimensions but it assumes the origin is the lower left corner 
> and therefore clips anything that is above the new dimensions. Back to 
> postscript commands in the rules file first though ... the ps.map maploc 
> command uses inches (why?? it should be points) so an A4 page is 8.27" x 
> 11.69" points are 1/72 of an inch thus 595p x 842p - it also has a 
> default 36p margin (0.5 inch). You'll need those numbers later. maploc 
> also lets you set the size of your image box:  maploc {x offset from 
> left edge} {y offset from top} {width of box} {height of box} Note: this 
> is all done via a BASH script with GRASS 7.4 on Linux (RHEL 7), not 
> python. This is my postscript rules file:
> 
> maploc 0.1 6.815 6.5 4.875 #468p x 351p map box moved down towards the 
> bottom of the page
> # note that if you push it too far down to where the box would run off 
> the bottom, the image is
> # resized to fit on the page so do some testing to come up with the 
> correct values
> # also I found the computational region controls the aspect ratio so 
> although I say
> # 6.5 x 4.875 with the above maploc command, I got a 6.5 x 3.8 inch box.
> border y # add a border to the map frame (box)
>    color 81:81:81 # shade of gray
>    end # end the border controls
> vareas admin_area # top vector layer to display
>    layer 1 # attribute table to use
>    rgbcolumn area_color # name of column holding R:G:B values to fill 
> the polygons
>    color 153:153:153 #boundary color
>    end # end the admin_area controls
> vareas Country # this is the bottom vectors to display
>    color 210:210:210 #boundary color
>    fcolor 153:153:153 #fill color for all polygons
>    end # end the Country controls
> 
> Here's the command to run to generate the postscript file:
> 
> ps.map input=$HOME/ps_rules.txt out=$HOME/color_admin.ps --overwrite
> 
> To convert the postscript to PNG I had to use ghostscript - there are 
> other tools you can use though.
> 
> gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -r300 -dTextAlphaBits=4 
> -dGraphicsAlphaBits=4 -dDEVICEWIDTHPOINTS=473 -dDEVICEHEIGHTPOINTS=276 
> -dFIXEDMEDIA -dPSFitPage -sOutputFile=$HOME/color_admin.png -c 
> "<> setpagedevice" -f $HOME/color_admin.ps
> 
> So the above line needs some explaining 
> (http://www.ghostscript.com/doc/9.27/Use.htm) but in a nutshell, the 
> parameters to play with are first the Pageoffset [x y] values. They are 
> in points not inches ... 1/72 inch = 1 point ... remember the 1/2" 
> margins? the -34 gives me 2 points of white space to the left edge of 
> the map frame, the 78 I had to play with to push the map frame down to 
> the right spot.
> Next is the DEVICEWIDTHPOINTS and DEVICEHEIGHTPOINTS 

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

[Moritz Lennert]

Hi Chris,

For me, the following works with the current stable GRASS GIS (7.8.5) 
and using maps from the NC demo data set:


export GRASS_RENDER_IMMEDIATE=png
export GRASS_RENDER_WIDTH=640
export GRASS_RENDER_HEIGHT=480
export GRASS_RENDER_TRANSPARENT=true
export GRASS_RENDER_TRUECOLOR=true
export GRASS_RENDER_FILE_COMPRESSION=0
export GRASS_MESSAGE_FORMAT=plain
export GRASS_RENDER_FILE_READ=TRUE

g.region vect=census_wake2000
d.vect map=census_wake2000@PERMANENT fill_color=none
d.vect map=roadsmajor@PERMANENT color=255:0:0:255
d.vect map=schools_wake@PERMANENT fill_color=0:128:0:255 
icon=basic/circle size=10


I attach a small thumbnail of the resulting PNG file.

Moritz


On 11/02/21 18:54, Chris Bartolomei via grass-user wrote:

Good morning Anna,
It took quite a while of trial and error but I worked out a method that 
kindof works:
First off - unless someone says otherwise, you can't use the PNG driver 
(d.mon) method to overlay more than one polygon vector. Sorry - it just 
doesn't work. You CAN use the ps.map method - that works really well 
generating the image however it by default assumes you are printing on 
an A4 piece of paper so there's all sorts of white space.  The image is 
centered at the top of this fictional piece of paper. In your postscript 
rules file you can use the "maploc" command to position the image 
elsewhere on the page. This is necessary because the next trick changes 
the paper dimensions but it assumes the origin is the lower left corner 
and therefore clips anything that is above the new dimensions. Back to 
postscript commands in the rules file first though ... the ps.map maploc 
command uses inches (why?? it should be points) so an A4 page is 8.27" x 
11.69" points are 1/72 of an inch thus 595p x 842p - it also has a 
default 36p margin (0.5 inch). You'll need those numbers later. maploc 
also lets you set the size of your image box:  maploc {x offset from 
left edge} {y offset from top} {width of box} {height of box} Note: this 
is all done via a BASH script with GRASS 7.4 on Linux (RHEL 7), not 
python. This is my postscript rules file:


maploc 0.1 6.815 6.5 4.875 #468p x 351p map box moved down towards the 
bottom of the page
# note that if you push it too far down to where the box would run off 
the bottom, the image is
# resized to fit on the page so do some testing to come up with the 
correct values
# also I found the computational region controls the aspect ratio so 
although I say

# 6.5 x 4.875 with the above maploc command, I got a 6.5 x 3.8 inch box.
border y # add a border to the map frame (box)
   color 81:81:81 # shade of gray
   end # end the border controls
vareas admin_area # top vector layer to display
   layer 1 # attribute table to use
   rgbcolumn area_color # name of column holding R:G:B values to fill 
the polygons

   color 153:153:153 #boundary color
   end # end the admin_area controls
vareas Country # this is the bottom vectors to display
   color 210:210:210 #boundary color
   fcolor 153:153:153 #fill color for all polygons
   end # end the Country controls

Here's the command to run to generate the postscript file:

ps.map input=$HOME/ps_rules.txt out=$HOME/color_admin.ps --overwrite

To convert the postscript to PNG I had to use ghostscript - there are 
other tools you can use though.


gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -r300 -dTextAlphaBits=4 
-dGraphicsAlphaBits=4 -dDEVICEWIDTHPOINTS=473 -dDEVICEHEIGHTPOINTS=276 
-dFIXEDMEDIA -dPSFitPage -sOutputFile=$HOME/color_admin.png -c 
"<> setpagedevice" -f $HOME/color_admin.ps


So the above line needs some explaining 
(http://www.ghostscript.com/doc/9.27/Use.htm) but in a nutshell, the 
parameters to play with are first the Pageoffset [x y] values. They are 
in points not inches ... 1/72 inch = 1 point ... remember the 1/2" 
margins? the -34 gives me 2 points of white space to the left edge of 
the map frame, the 78 I had to play with to push the map frame down to 
the right spot.
Next is the DEVICEWIDTHPOINTS and DEVICEHEIGHTPOINTS ... again in points 
... this "trims" the paper to height and width ... set something then 
run it and view the results. Adjust and run again until you get it correct.


It's a royal pain but it seems to work this way. It would sure be nice 
to create a GRASS workspace file and just say "convert this workspace to 
an image" with everything all laid out nicely - like Arc does exporting 
their mxd map files...


I hope this helps someone !
:)
Chris


On Wednesday, February 10, 2021, 11:08:00 PM EST, Anna Petrášová 
 wrote:





On Tue, Feb 9, 2021 at 4:41 PM Chris Bartolomei > wrote:


Hi Anna - thank you for the suggestion - I tried it but alas, still
it only outputs a single vector map (layer). I can get either the
Country vector or the admin_areas vector, but not both overlaid.
:(
Chris


I realized you are using both environmental variables and d.mon, that 
might cause some issues, you use one or the 

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

[Paulo van Breugel]

Would this addon be useful? 
https://grass.osgeo.org/grass78/manuals/addons/m.printws.html


On February 11, 2021 6:55:24 PM Chris Bartolomei via grass-user 
 wrote:


Good morning Anna,
It took quite a while of trial and error but I worked out a method that 
kindof works:
First off - unless someone says otherwise, you can't use the PNG driver 
(d.mon) method to overlay more than one polygon vector. Sorry - it just 
doesn't work. You CAN use the ps.map method - that works really well 
generating the image however it by default assumes you are printing on an 
A4 piece of paper so there's all sorts of white space.  The image is 
centered at the top of this fictional piece of paper. In your postscript 
rules file you can use the "maploc" command to position the image elsewhere 
on the page. This is necessary because the next trick changes the paper 
dimensions but it assumes the origin is the lower left corner and therefore 
clips anything that is above the new dimensions. Back to postscript 
commands in the rules file first though ... the ps.map maploc command uses 
inches (why?? it should be points) so an A4 page is 8.27" x 11.69"  points 
are 1/72 of an inch thus 595p x 842p - it also has a default 36p margin 
(0.5 inch). You'll need those numbers later. maploc also lets you set the 
size of your image box:  maploc {x offset from left edge} {y offset from 
top} {width of box} {height of box} Note: this is all done via a BASH 
script with GRASS 7.4 on Linux (RHEL 7), not python. This is my postscript 
rules file:


maploc 0.1 6.815 6.5 4.875 #468p x 351p map box moved down towards the 
bottom of the page
# note that if you push it too far down to where the box would run off the 
bottom, the image is
# resized to fit on the page so do some testing to come up with the correct 
values
# also I found the computational region controls the aspect ratio so 
although I say

# 6.5 x 4.875 with the above maploc command, I got a 6.5 x 3.8 inch box.
border y # add a border to the map frame (box)
color 81:81:81 # shade of gray
end # end the border controls
vareas admin_area # top vector layer to display
layer 1 # attribute table to use
rgbcolumn area_color # name of column holding R:G:B values to fill the polygons
color 153:153:153 #boundary color
end # end the admin_area controls
vareas Country # this is the bottom vectors to display
color 210:210:210 #boundary color
fcolor 153:153:153 #fill color for all polygons
end # end the Country controls


Here's the command to run to generate the postscript file:


ps.map input=$HOME/ps_rules.txt out=$HOME/color_admin.ps --overwrite


To convert the postscript to PNG I had to use ghostscript - there are other 
tools you can use though.



gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -r300 -dTextAlphaBits=4 
-dGraphicsAlphaBits=4 -dDEVICEWIDTHPOINTS=473 -dDEVICEHEIGHTPOINTS=276 
-dFIXEDMEDIA -dPSFitPage -sOutputFile=$HOME/color_admin.png -c 
"<> setpagedevice" -f $HOME/color_admin.ps


So the above line needs some explaining 
(http://www.ghostscript.com/doc/9.27/Use.htm) but in a nutshell, the 
parameters to play with are first the Pageoffset [x y] values. They are in 
points not inches ... 1/72 inch = 1 point ... remember the 1/2" margins? 
the -34 gives me 2 points of white space to the left edge of the map frame, 
the 78 I had to play with to push the map frame down to the right spot.
Next is the DEVICEWIDTHPOINTS and DEVICEHEIGHTPOINTS ... again in points 
... this "trims" the paper to height and width ... set something then run 
it and view the results. Adjust and run again until you get it correct.


It's a royal pain but it seems to work this way. It would sure be nice to 
create a GRASS workspace file and just say "convert this workspace to an 
image" with everything all laid out nicely - like Arc does exporting their 
mxd map files...


I hope this helps someone !
:)

Chris


On Wednesday, February 10, 2021, 11:08:00 PM EST, Anna Petrášová 
 wrote:





On Tue, Feb 9, 2021 at 4:41 PM Chris Bartolomei  wrote:

Hi Anna - thank you for the suggestion - I tried it but alas, still it only 
outputs a single vector map (layer). I can get either the Country vector or 
the admin_areas vector, but not both overlaid.

:(
Chris

I realized you are using both environmental variables and d.mon, that might 
cause some issues, you use one or the other. So try to remove the lines 
starting with d.mon.


Hope that helps,
Anna


On Tuesday, February 9, 2021, 1:20:52 PM EST, Anna Petrášová 
 wrote:



Hi,

On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user 
 wrote:

Good morning :)
I'm using GRASS 7.4.1 on a Linux cluster so I only have command-line 
capability. I have two vector layers (a country boundary polygon and part 
of an administrative area map - also polygons). I am trying to automate 
creating a PNG file of the admin areas overlaying the country boundary 
therefore all work has to be command-line (in a bash script). I've tried 
this two ways - using the d.mon 

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

[Chris Bartolomei via grass-user]

 Good morning Anna,It took quite a while of trial and error but I worked out a 
method that kindof works:First off - unless someone says otherwise, you can't 
use the PNG driver (d.mon) method to overlay more than one polygon vector. 
Sorry - it just doesn't work. You CAN use the ps.map method - that works really 
well generating the image however it by default assumes you are printing on an 
A4 piece of paper so there's all sorts of white space.  The image is centered 
at the top of this fictional piece of paper. In your postscript rules file you 
can use the "maploc" command to position the image elsewhere on the page. This 
is necessary because the next trick changes the paper dimensions but it assumes 
the origin is the lower left corner and therefore clips anything that is above 
the new dimensions. Back to postscript commands in the rules file first though 
... the ps.map maploc command uses inches (why?? it should be points) so an A4 
page is 8.27" x 11.69"  points are 1/72 of an inch thus 595p x 842p - it also 
has a default 36p margin (0.5 inch). You'll need those numbers later. maploc 
also lets you set the size of your image box:  maploc {x offset from left edge} 
{y offset from top} {width of box} {height of box} Note: this is all done via a 
BASH script with GRASS 7.4 on Linux (RHEL 7), not python. This is my postscript 
rules file:
maploc 0.1 6.815 6.5 4.875 #468p x 351p map box moved down towards the bottom 
of the page# note that if you push it too far down to where the box would run 
off the bottom, the image is# resized to fit on the page so do some testing to 
come up with the correct values# also I found the computational region controls 
the aspect ratio so although I say 
# 6.5 x 4.875 with the above maploc command, I got a 6.5 x 3.8 inch box.border 
y # add a border to the map frame (box)  color 81:81:81 # shade of gray  end # 
end the border controlsvareas admin_area # top vector layer to display  layer 1 
# attribute table to use  rgbcolumn area_color # name of column holding R:G:B 
values to fill the polygons  color 153:153:153 #boundary color  end # end the 
admin_area controlsvareas Country # this is the bottom vectors to display  
color 210:210:210 #boundary color  fcolor 153:153:153 #fill color for all 
polygons  end # end the Country controls
Here's the command to run to generate the postscript file:
ps.map input=$HOME/ps_rules.txt out=$HOME/color_admin.ps --overwrite
To convert the postscript to PNG I had to use ghostscript - there are other 
tools you can use though.
gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -r300 -dTextAlphaBits=4 
-dGraphicsAlphaBits=4 -dDEVICEWIDTHPOINTS=473 -dDEVICEHEIGHTPOINTS=276 
-dFIXEDMEDIA -dPSFitPage -sOutputFile=$HOME/color_admin.png -c "<> setpagedevice" -f $HOME/color_admin.ps
So the above line needs some explaining 
(http://www.ghostscript.com/doc/9.27/Use.htm) but in a nutshell, the parameters 
to play with are first the Pageoffset [x y] values. They are in points not 
inches ... 1/72 inch = 1 point ... remember the 1/2" margins? the -34 gives me 
2 points of white space to the left edge of the map frame, the 78 I had to play 
with to push the map frame down to the right spot.Next is the DEVICEWIDTHPOINTS 
and DEVICEHEIGHTPOINTS ... again in points ... this "trims" the paper to height 
and width ... set something then run it and view the results. Adjust and run 
again until you get it correct.
It's a royal pain but it seems to work this way. It would sure be nice to 
create a GRASS workspace file and just say "convert this workspace to an image" 
with everything all laid out nicely - like Arc does exporting their mxd map 
files...
I hope this helps someone !:)
Chris

On Wednesday, February 10, 2021, 11:08:00 PM EST, Anna Petrášová 
 wrote:  
 
 

On Tue, Feb 9, 2021 at 4:41 PM Chris Bartolomei  wrote:

 Hi Anna - thank you for the suggestion - I tried it but alas, still it only 
outputs a single vector map (layer). I can get either the Country vector or the 
admin_areas vector, but not both overlaid.:(Chris


I realized you are using both environmental variables and d.mon, that might 
cause some issues, you use one or the other. So try to remove the lines 
starting with d.mon.
Hope that helps,Anna 

On Tuesday, February 9, 2021, 1:20:52 PM EST, Anna Petrášová 
 wrote:  
 
 Hi,
On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user 
 wrote:

Good morning :)I'm using GRASS 7.4.1 on a Linux cluster so I only have 
command-line capability. I have two vector layers (a country boundary polygon 
and part of an administrative area map - also polygons). I am trying to 
automate creating a PNG file of the admin areas overlaying the country boundary 
therefore all work has to be command-line (in a bash script). I've tried this 
two ways - using the d.mon start=png method and also the ps.map method as 
described below. The d.mon method appears to generate the image with only one 
vector map (not both) and only colors the borders - 

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

[Anna Petrášová]

On Tue, Feb 9, 2021 at 4:41 PM Chris Bartolomei  wrote:

> Hi Anna - thank you for the suggestion - I tried it but alas, still it
> only outputs a single vector map (layer). I can get either the Country
> vector or the admin_areas vector, but not both overlaid.
> :(
> Chris
>

I realized you are using both environmental variables and d.mon, that might
cause some issues, you use one or the other. So try to remove the lines
starting with d.mon.

Hope that helps,
Anna

>
> On Tuesday, February 9, 2021, 1:20:52 PM EST, Anna Petrášová <
> kratocha...@gmail.com> wrote:
>
>
> Hi,
>
> On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user <
> grass-user@lists.osgeo.org> wrote:
>
> Good morning :)
> I'm using GRASS 7.4.1 on a Linux cluster so I only have command-line
> capability. I have two vector layers (a country boundary polygon and part
> of an administrative area map - also polygons). I am trying to automate
> creating a PNG file of the admin areas overlaying the country boundary
> therefore all work has to be command-line (in a bash script). I've tried
> this two ways - using the d.mon start=png method and also the ps.map method
> as described below. The d.mon method appears to generate the image with
> only one vector map (not both) and only colors the borders - it won't use
> the fill_color setting. The ps.map method seems to work but assumes the
> image is on a sheet of paper so there's a ton of extra white-space. I'd
> like to use d.mon but I can use ps.map if someone could please let me know
> how to export only the computational region without all the extra 'paper'
> in the image. Here's my code:
>
> g.region vector='Country'
> export GRASS_RENDER_IMMEDIATE=png
> export GRASS_RENDER_WIDTH=640
> export GRASS_RENDER_HEIGHT=480
> export GRASS_RENDER_TRANSPARENT=true
> export GRASS_RENDER_TRUECOLOR=true
> export GRASS_RENDER_FILE=$HOME/country_admin.png
> export GRASS_RENDER_FILE_COMPRESSION=0
> export GRASS_MESSAGE_FORMAT=plain
> d.mon start=png
> d.vect map=Country color=210:210:210 fill_color=153:153:153 display=shape
> type=area
> d.vect map=admin_area color=153:153:153 rgb_column=area_color
> display=shape type=area
> d.mon stop=png
>
> This only produces a png with the last vector listed and only the borders
> are colored with the rgb_column values.
>
>
> I think you are missing  GRASS_RENDER_FILE_READ=TRUE:
> https://grass.osgeo.org/grass78/manuals/pngdriver.html
>
> Regarding rgb_column, I am not sure, didn't have time to test.
>
> Anna
>
>
> If I do this without the d.mon start/stop lines ... i.e. relying on the
> GRASS_RENDER_IMMEDIATE=png only, then only one vector map is converted to
> png however it DOES do the color fill properly. With either above method
> the png is the correct size.
>
> Now using ps.map (same env variable set as above):
>
> g.region vector='Country'
> ps.map input=$HOME/ps_rules.txt out=$HOME/country_admin.ps --overwrite
>   where ps_rules.txt is:
> border y
>   color 81:81:81
>   end
> vareas admin_area
>   layer 1
>   rgbcolumn area_color
>   color 153:153:153
>   end
> vareas Country
>   color 210:210:210
>   fcolor 153:153:153
>   end
>
> We don't have pstopng but we do have ghostscript:
>
> gs-dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dTextAlphaBits=4
> -dGraphicsAlphaBits=4 -r300 -sOutputFile=$HOME/country_admin.png $HOME/
> country_admin.ps
>
> This creates the correct image (color fills, etc) but has white margins
> and a lot of white space below the image like it is printed at the top of
> a piece of paper.
>
> does anyone have any idea how to create a png with multiple vector maps
> overlaying each other (and not have the extra whitespace too)?
>
> v/r
> Chris
>
> ___
> grass-user mailing list
> grass-user@lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/grass-user
>
>
___
grass-user mailing list
grass-user@lists.osgeo.org
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Re: [GRASS-user] Creating a png file with multiple vector maps

[Chris Bartolomei via grass-user]

 Hi Anna - thank you for the suggestion - I tried it but alas, still it only 
outputs a single vector map (layer). I can get either the Country vector or the 
admin_areas vector, but not both overlaid.:(Chris

On Tuesday, February 9, 2021, 1:20:52 PM EST, Anna Petrášová 
 wrote:  
 
 Hi,
On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user 
 wrote:

Good morning :)I'm using GRASS 7.4.1 on a Linux cluster so I only have 
command-line capability. I have two vector layers (a country boundary polygon 
and part of an administrative area map - also polygons). I am trying to 
automate creating a PNG file of the admin areas overlaying the country boundary 
therefore all work has to be command-line (in a bash script). I've tried this 
two ways - using the d.mon start=png method and also the ps.map method as 
described below. The d.mon method appears to generate the image with only one 
vector map (not both) and only colors the borders - it won't use the fill_color 
setting. The ps.map method seems to work but assumes the image is on a sheet of 
paper so there's a ton of extra white-space. I'd like to use d.mon but I can 
use ps.map if someone could please let me know how to export only the 
computational region without all the extra 'paper' in the image. Here's my code:
g.region vector='Country'export GRASS_RENDER_IMMEDIATE=pngexport 
GRASS_RENDER_WIDTH=640export GRASS_RENDER_HEIGHT=480export 
GRASS_RENDER_TRANSPARENT=trueexport GRASS_RENDER_TRUECOLOR=trueexport 
GRASS_RENDER_FILE=$HOME/country_admin.pngexport 
GRASS_RENDER_FILE_COMPRESSION=0export GRASS_MESSAGE_FORMAT=plaind.mon 
start=pngd.vect map=Country color=210:210:210 fill_color=153:153:153 
display=shape type=aread.vect map=admin_area color=153:153:153 
rgb_column=area_color display=shape type=aread.mon stop=png
This only produces a png with the last vector listed and only the borders are 
colored with the rgb_column values.

I think you are missing  
GRASS_RENDER_FILE_READ=TRUE:https://grass.osgeo.org/grass78/manuals/pngdriver.html

Regarding rgb_column, I am not sure, didn't have time to test.
Anna

If I do this without the d.mon start/stop lines ... i.e. relying on the 
GRASS_RENDER_IMMEDIATE=png only, then only one vector map is converted to png 
however it DOES do the color fill properly. With either above method the png is 
the correct size.
Now using ps.map (same env variable set as above):
g.region vector='Country'
ps.map input=$HOME/ps_rules.txt out=$HOME/country_admin.ps --overwrite 
  where ps_rules.txt is:border y  color 81:81:81  endvareas admin_area  layer 1 
 rgbcolumn area_color  color 153:153:153  endvareas Country  color 210:210:210  
fcolor 153:153:153  end
We don't have pstopng but we do have ghostscript:
gs-dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dTextAlphaBits=4 
-dGraphicsAlphaBits=4 -r300 -sOutputFile=$HOME/country_admin.png 
$HOME/country_admin.ps
This creates the correct image (color fills, etc) but has white margins and a 
lot of white space below the image like it is printed at the top of a piece of 
paper.
does anyone have any idea how to create a png with multiple vector maps 
overlaying each other (and not have the extra whitespace too)?
v/rChris
___
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grass-user@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-user

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

[Anna Petrášová]

Hi,

On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user <
grass-user@lists.osgeo.org> wrote:

> Good morning :)
> I'm using GRASS 7.4.1 on a Linux cluster so I only have command-line
> capability. I have two vector layers (a country boundary polygon and part
> of an administrative area map - also polygons). I am trying to automate
> creating a PNG file of the admin areas overlaying the country boundary
> therefore all work has to be command-line (in a bash script). I've tried
> this two ways - using the d.mon start=png method and also the ps.map method
> as described below. The d.mon method appears to generate the image with
> only one vector map (not both) and only colors the borders - it won't use
> the fill_color setting. The ps.map method seems to work but assumes the
> image is on a sheet of paper so there's a ton of extra white-space. I'd
> like to use d.mon but I can use ps.map if someone could please let me know
> how to export only the computational region without all the extra 'paper'
> in the image. Here's my code:
>
> g.region vector='Country'
> export GRASS_RENDER_IMMEDIATE=png
> export GRASS_RENDER_WIDTH=640
> export GRASS_RENDER_HEIGHT=480
> export GRASS_RENDER_TRANSPARENT=true
> export GRASS_RENDER_TRUECOLOR=true
> export GRASS_RENDER_FILE=$HOME/country_admin.png
> export GRASS_RENDER_FILE_COMPRESSION=0
> export GRASS_MESSAGE_FORMAT=plain
> d.mon start=png
> d.vect map=Country color=210:210:210 fill_color=153:153:153 display=shape
> type=area
> d.vect map=admin_area color=153:153:153 rgb_column=area_color
> display=shape type=area
> d.mon stop=png
>
> This only produces a png with the last vector listed and only the borders
> are colored with the rgb_column values.
>

I think you are missing  GRASS_RENDER_FILE_READ=TRUE:
https://grass.osgeo.org/grass78/manuals/pngdriver.html

Regarding rgb_column, I am not sure, didn't have time to test.

Anna

>
> If I do this without the d.mon start/stop lines ... i.e. relying on the
> GRASS_RENDER_IMMEDIATE=png only, then only one vector map is converted to
> png however it DOES do the color fill properly. With either above method
> the png is the correct size.
>
> Now using ps.map (same env variable set as above):
>
> g.region vector='Country'
> ps.map input=$HOME/ps_rules.txt out=$HOME/country_admin.ps --overwrite
>   where ps_rules.txt is:
> border y
>   color 81:81:81
>   end
> vareas admin_area
>   layer 1
>   rgbcolumn area_color
>   color 153:153:153
>   end
> vareas Country
>   color 210:210:210
>   fcolor 153:153:153
>   end
>
> We don't have pstopng but we do have ghostscript:
>
> gs-dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dTextAlphaBits=4
> -dGraphicsAlphaBits=4 -r300 -sOutputFile=$HOME/country_admin.png $HOME/
> country_admin.ps
>
> This creates the correct image (color fills, etc) but has white margins
> and a lot of white space below the image like it is printed at the top of
> a piece of paper.
>
> does anyone have any idea how to create a png with multiple vector maps
> overlaying each other (and not have the extra whitespace too)?
>
> v/r
> Chris
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[GRASS-user] Creating a png file with multiple vector maps

[Chris Bartolomei via grass-user]

Good morning :)I'm using GRASS 7.4.1 on a Linux cluster so I only have 
command-line capability. I have two vector layers (a country boundary polygon 
and part of an administrative area map - also polygons). I am trying to 
automate creating a PNG file of the admin areas overlaying the country boundary 
therefore all work has to be command-line (in a bash script). I've tried this 
two ways - using the d.mon start=png method and also the ps.map method as 
described below. The d.mon method appears to generate the image with only one 
vector map (not both) and only colors the borders - it won't use the fill_color 
setting. The ps.map method seems to work but assumes the image is on a sheet of 
paper so there's a ton of extra white-space. I'd like to use d.mon but I can 
use ps.map if someone could please let me know how to export only the 
computational region without all the extra 'paper' in the image. Here's my code:
g.region vector='Country'export GRASS_RENDER_IMMEDIATE=pngexport 
GRASS_RENDER_WIDTH=640export GRASS_RENDER_HEIGHT=480export 
GRASS_RENDER_TRANSPARENT=trueexport GRASS_RENDER_TRUECOLOR=trueexport 
GRASS_RENDER_FILE=$HOME/country_admin.pngexport 
GRASS_RENDER_FILE_COMPRESSION=0export GRASS_MESSAGE_FORMAT=plaind.mon 
start=pngd.vect map=Country color=210:210:210 fill_color=153:153:153 
display=shape type=aread.vect map=admin_area color=153:153:153 
rgb_column=area_color display=shape type=aread.mon stop=png
This only produces a png with the last vector listed and only the borders are 
colored with the rgb_column values.
If I do this without the d.mon start/stop lines ... i.e. relying on the 
GRASS_RENDER_IMMEDIATE=png only, then only one vector map is converted to png 
however it DOES do the color fill properly. With either above method the png is 
the correct size.
Now using ps.map (same env variable set as above):
g.region vector='Country'
ps.map input=$HOME/ps_rules.txt out=$HOME/country_admin.ps --overwrite 
  where ps_rules.txt is:border y  color 81:81:81  endvareas admin_area  layer 1 
 rgbcolumn area_color  color 153:153:153  endvareas Country  color 210:210:210  
fcolor 153:153:153  end
We don't have pstopng but we do have ghostscript:
gs-dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dTextAlphaBits=4 
-dGraphicsAlphaBits=4 -r300 -sOutputFile=$HOME/country_admin.png 
$HOME/country_admin.ps
This creates the correct image (color fills, etc) but has white margins and a 
lot of white space below the image like it is printed at the top of a piece of 
paper.
does anyone have any idea how to create a png with multiple vector maps 
overlaying each other (and not have the extra whitespace too)?
v/rChris
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