[GRASS-user] Creating a png file with multiple vector maps
Moritz Lennert
mlennert at club.worldonline.be
Tue Mar 2 06:53:02 PST 2021
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 at 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 at 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
> <mlennert at club.worldonline.be> wrote:
>
>
> Hi Chris,
>
> On 17/02/21 02:30, Chris Bartolomei wrote:
> > Ohhhhh !! Sooooooo 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 at PERMANENT
> <mailto:censuslbk_wwake at 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 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
> <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
> > <surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>> 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
> > <mlennert at club.worldonline.be <mailto:mlennert at club.worldonline.be>>
> 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=$HOME/test.png
> >
> > g.region vect=census_wake2000
> > d.vect map=census_wake2000 at PERMANENT
> <mailto:census_wake2000 at PERMANENT> <mailto:census_wake2000 at PERMANENT
> <mailto:census_wake2000 at PERMANENT>>
> > fill_color=grey
> > d.vect map=censusblk_swwake at PERMANENT
> <mailto:censusblk_swwake at PERMANENT>
> > <mailto:censusblk_swwake at PERMANENT
> <mailto:censusblk_swwake at PERMANENT>> fill_color=red
> >
> > I've tried with
> >
> > export GRASS_RENDER_TRANSPARENT=TRUE
> > and
> > export GRASS_RENDER_TRANSPARENT=FALSE
> >
> > As you can see in the attached images, the overlay seems to work without
> > any issues (or I don't understand what you are looking for exactly) and
> > setting GRASS_RENDER_TRANSPARENT decides on whether the background
> > should be transparent or not.
> >
> > A second test in the same data set, but with different layers:
> >
> > export GRASS_RENDER_TRANSPARENT=TRUE
> > export GRASS_RENDER_FILE=$HOME/test_NC_TRUE.png
> > g.region vect=boundary_county
> > d.vect map=boundary_county at PERMANENT
> <mailto:boundary_county at PERMANENT> <mailto:boundary_county at PERMANENT
> <mailto:boundary_county at PERMANENT>>
> > d.vect map=boundary_municp at PERMANENT
> <mailto:boundary_municp at PERMANENT> <mailto:boundary_municp at PERMANENT
> <mailto:boundary_municp at 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 at PERMANENT
> <mailto:boundary_county at PERMANENT> <mailto:boundary_county at PERMANENT
> <mailto:boundary_county at PERMANENT>>
> > d.vect map=boundary_municp at PERMANENT
> <mailto:boundary_municp at PERMANENT> <mailto:boundary_municp at PERMANENT
> <mailto:boundary_municp at 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
> > > <mlennert at club.worldonline.be
> <mailto:mlennert at club.worldonline.be>
> <mailto:mlennert at club.worldonline.be
> <mailto:mlennert at club.worldonline.be>>>
> > 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 at PERMANENT
> <mailto:census_wake2000 at PERMANENT>
> > <mailto:census_wake2000 at PERMANENT <mailto:census_wake2000 at PERMANENT>>
> <mailto:census_wake2000 at PERMANENT <mailto:census_wake2000 at PERMANENT>
> > <mailto:census_wake2000 at PERMANENT <mailto:census_wake2000 at PERMANENT>>>
> > > fill_color=none
> > > d.vect map=roadsmajor at PERMANENT <mailto:roadsmajor at PERMANENT>
> <mailto:roadsmajor at PERMANENT <mailto:roadsmajor at PERMANENT>>
> > <mailto:roadsmajor at PERMANENT <mailto:roadsmajor at PERMANENT>
> <mailto:roadsmajor at PERMANENT <mailto:roadsmajor at PERMANENT>>>
> > > color=255:0:0:255
> > > d.vect map=schools_wake at PERMANENT <mailto:schools_wake at PERMANENT>
> <mailto:schools_wake at PERMANENT <mailto:schools_wake at PERMANENT>>
> > <mailto:schools_wake at PERMANENT <mailto:schools_wake at PERMANENT>
> <mailto:schools_wake at PERMANENT <mailto:schools_wake at 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
> > > > "<</PageOffset [-34 78]>> setpagedevice" -f $HOME/color_admin.ps
> > > >
> > > > So the above line needs some explaining
> > > > (http://www.ghostscript.com/doc/9.27/Use.htm
> <http://www.ghostscript.com/doc/9.27/Use.htm >
> > <http://www.ghostscript.com/doc/9.27/Use.htm
> <http://www.ghostscript.com/doc/9.27/Use.htm >>
> > > <http://www.ghostscript.com/doc/9.27/Use.htm
> <http://www.ghostscript.com/doc/9.27/Use.htm >
> > <http://www.ghostscript.com/doc/9.27/Use.htm
> <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
> > > > <kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>
> > <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>>> wrote:
> > > >
> > > >
> > > >
> > > >
> > > > On Tue, Feb 9, 2021 at 4:41 PM Chris Bartolomei
> <surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>
> > <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>>
> > > <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>
> <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>>>
> > > > <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>
> <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>>
> > <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>
> <mailto:surfcjb at yahoo.com <mailto:surfcjb at yahoo.com>>>>> 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
> > > > <kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>
> > <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>>
> > > <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>
> > <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>
> <mailto:kratochanna at gmail.com <mailto:kratochanna at gmail.com>>>>> wrote:
> > > >
> > > >
> > > > Hi,
> > > >
> > > > On Tue, Feb 9, 2021 at 10:25 AM Chris Bartolomei via grass-user
> > > > <grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org> <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org>>
> > <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org> <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org>>>
> > > <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org>
> > <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org>> <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at lists.osgeo.org>
> > <mailto:grass-user at lists.osgeo.org
> <mailto:grass-user at 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
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >
> > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >>
> > > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >
> > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html>>>
> > > > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >
> > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >>
> > > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <https://grass.osgeo.org/grass78/manuals/pngdriver.html >
> > <https://grass.osgeo.org/grass78/manuals/pngdriver.html
> <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 likeit 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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