[GRASS-user] d.out.file format=png file malformed

GRASS GRASS user
1

Friends,

     I'm using GRASS 70-svn on Arch linux to generate figures for a report. The general process is

1) GRASS - d.out.file format=png
2) xfig - import the PNG file, annotate, and export as PDF
3) TeX - import the file in a dvipdfm \special

    However, I'm now having problems with non-functional PNG files from d.out.file. Just below is a paste from my console. You can't see the error from inside xfig, but the line just below "xfig" is the stderr output from attempting to import demo_png.png.

***********************************************************************
GRASS 7.0.svn > d.out.file out=demo_png.png format=png size=800,600
                                Mapset <final> in Location <beartooth>
GRASS 7.0.svn > xfig
Warning: translation table syntax error: Missing '(' while parsing action sequence
'arning: ... found while parsing ':~Ctrl<Key>1: insert-string(1)
Warning: String to TranslationTable conversion encountered errors
libpng error: invalid file gamma in png_set_gamma
***********************************************************************

    The resulting PNG file will import into Imagemagick OK, and can then be exported back out as a PNG file which xfig will accept, so there is a work around, but maybe this is easily fixed? I've had a look at Anna's python script but haven't gone into the imported modules.

Thanks, Dave
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David W. Roberts office 406-994-4548
Professor and Head FAX 406-994-3190
Department of Ecology email droberts@montana.edu
Montana State University
Bozeman, MT 59717-3460

2

Hi,

···

On Fri, Jul 18, 2014 at 1:56 PM, Dave Roberts <dvrbts@ecology.msu.montana.edu> wrote:

Friends,

I’m using GRASS 70-svn on Arch linux to generate figures for a report. The general process is

  1. GRASS - d.out.file format=png
  2. xfig - import the PNG file, annotate, and export as PDF
  3. TeX - import the file in a dvipdfm \special

However, I’m now having problems with non-functional PNG files from d.out.file. Just below is a paste from my console. You can’t see the error from inside xfig, but the line just below “xfig” is the stderr output from attempting to import demo_png.png.

GRASS 7.0.svn > d.out.file out=demo_png.png format=png size=800,600

Mapset in Location
GRASS 7.0.svn > xfig
Warning: translation table syntax error: Missing ‘(’ while parsing action sequence
'arning: … found while parsing ':~Ctrl1: insert-string(1)
Warning: String to TranslationTable conversion encountered errors
libpng error: invalid file gamma in png_set_gamma

The resulting PNG file will import into Imagemagick OK, and can then be exported back out as a PNG file which xfig will accept, so there is a work around, but maybe this is easily fixed? I’ve had a look at Anna’s python script but haven’t gone into the imported modules.

I have never had any problems with exported images from GRASS. d.out.file uses the same mechanism as when you use the toolbar button in map display. I tried to get the png into xfig and it didn’t complain (xfig version 3.2.5b). Any other image processing tools have problems (e.g. gimp)?

Anna

Thanks, Dave

David W. Roberts office 406-994-4548
Professor and Head FAX 406-994-3190
Department of Ecology email [droberts@montana.edu](mailto:droberts@montana.edu)
Montana State University
Bozeman, MT 59717-3460
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3

Hi Anna,

    I hadn't tried gimp yet so I installed it to see. Works fine in both gimp and Imagemagick, so I guess it's an xfig thing. I'm running xfig 3.2.5c which is only slightly newer than yours, but maybe that broke it.

Thanks, Dave

On 07/18/2014 01:00 PM, Anna Petrášová wrote:

Hi,

On Fri, Jul 18, 2014 at 1:56 PM, Dave Roberts
<dvrbts@ecology.msu.montana.edu <mailto:dvrbts@ecology.msu.montana.edu>>
wrote:

    Friends,

         I'm using GRASS 70-svn on Arch linux to generate figures for a
    report. The general process is

    1) GRASS - d.out.file format=png
    2) xfig - import the PNG file, annotate, and export as PDF
    3) TeX - import the file in a dvipdfm \special

        However, I'm now having problems with non-functional PNG files
    from d.out.file. Just below is a paste from my console. You can't
    see the error from inside xfig, but the line just below "xfig" is
    the stderr output from attempting to import demo_png.png.

    ******************************__******************************__***********
    GRASS 7.0.svn > d.out.file out=demo_png.png format=png size=800,600

                                   Mapset <final> in Location <beartooth>
    GRASS 7.0.svn > xfig
    Warning: translation table syntax error: Missing '(' while parsing
    action sequence
    'arning: ... found while parsing ':~Ctrl<Key>1: insert-string(1)
    Warning: String to TranslationTable conversion encountered errors
    libpng error: invalid file gamma in png_set_gamma
    ******************************__******************************__***********

        The resulting PNG file will import into Imagemagick OK, and can
    then be exported back out as a PNG file which xfig will accept, so
    there is a work around, but maybe this is easily fixed? I've had a
    look at Anna's python script but haven't gone into the imported modules.

I have never had any problems with exported images from GRASS.
d.out.file uses the same mechanism as when you use the toolbar button in
map display. I tried to get the png into xfig and it didn't complain
(xfig version 3.2.5b). Any other image processing tools have problems
(e.g. gimp)?

Anna

    Thanks, Dave
    --
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~__~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~__~~~~~~~~~~~~
    David W. Roberts office
    406-994-4548 <tel:406-994-4548>
    Professor and Head FAX
    406-994-3190 <tel:406-994-3190>
    Department of Ecology email
    droberts@montana.edu <mailto:droberts@montana.edu>
    Montana State University
    Bozeman, MT 59717-3460
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    grass-user mailing list
    grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
    http://lists.osgeo.org/__mailman/listinfo/grass-user
    <http://lists.osgeo.org/mailman/listinfo/grass-user&gt;

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David W. Roberts office 406-994-4548
Professor and Head FAX 406-994-3190
Department of Ecology email droberts@montana.edu
Montana State University
Bozeman, MT 59717-3460