[GRASS-user] How to define the png image dimensions when using d.mon?

[jean pierre huart]

Thanks Vinay, for the suggestion but I get an error on the d.out.file 
instruction.
By the way, I've investigated the problem a bit further and found that I 
mixed up instructions from manuals of different versions.
So coming back to GRASS v 7.0.x references I finally succeed in 
obtaining a solution but not 100% satisfactory.

First trial create a unique image combining raster and vector, but width 
and height remains at default and background is not transparent:

     os.environ['GRASS_RENDER_TRANSPARENT'] = 'TRUE'
     os.environ['GRASS_RENDER_WIDTH'] = str(1280)
     os.environ['GRASS_RENDER_HEIGHT'] = str(960)
     os.environ['GRASS_RENDER_FILE'] = filenameCombined.png

     self.gscript.run_command('d.mon', overwrite=True, start='png', 
output=filename)
     self.gscript.run_command('d.rast', map='{0}@{1}'.format(raster, 
currentmapset)
     self.gscript.run_command('d.vect', map='{0}@{1}'.format(map, 
currentmapset), color='white', fill_color='none')
     self.gscript.run_command('d.mon', stop="png")


Second trial successfull for obtaining desired width, height and 
transparency of the background  but creating 2 images one for the raster 
and the other for the vector, now I would like to combine them to have 
only one image:

     os.environ['GRASS_RENDER_IMMEDIATE'] = 'png'
     os.environ['GRASS_RENDER_TRANSPARENT'] = 'TRUE'
     os.environ['GRASS_RENDER_WIDTH'] = str(1280)
     os.environ['GRASS_RENDER_HEIGHT'] = str(960)

     os.environ['GRASS_RENDER_FILE'] = filenameOfRaster.png
     self.gscript.run_command('d.rast', map='{0}@{1}'.format(raster, 
currentmapset))

     os.environ['GRASS_RENDER_FILE'] = filenameOfVector.png
     self.gscript.run_command('d.vect', map='{0}@{1}'.format(map, 
currentmapset), color='white', fill_color='none')

Modifying this with the following

     os.environ['GRASS_RENDER_FILE'] = filenameCombined.png
     self.gscript.run_command('d.rast', map='{0}@{1}'.format(raster, 
currentmapset))
     self.gscript.run_command('d.vect', map='{0}@{1}'.format(map, 
currentmapset), color='white', fill_color='none')

ends with only the image of the vector.

I've the feeling that using d.mon would be preferable, but it seems that 
it does not take into account the environment variables (at the 
exception of GRASS_RENDER_FILE) that I propose.

If you have other suggestions to go further I'll be very gratefull.
Ciao

-- 
Jean Pierre Huart



On 09/03/16 05:10, Vinay Elothunkal wrote:
> Hi jean pierre huart,
>
> I have exported png image using module "d.out.file",(I have pasted a 
> part of the script below which I have used. I hope this will help you....
> .......................................................
> import grass.script as g
> import os
> import shutil
> import time
> g.run_command('r.colors',map=str(i),rules='color_table.txt')
>    g.start_command('d.mon', start='wx1')
>    time.sleep(10)
>    g.run_command('d.rast', map=str(i))
>    time.sleep(10)
>    g.run_command('d.vect', map=str(i))
>    time.sleep(40)
>  g.run_command('d.out.file',output=str(i),format='png',size=(2403,2403))
>    time.sleep(10)
>    g.run_command('d.mon', stop='wx1')
>    time.sleep(10)
> .................................................................
>
> Regards,
> Vinay
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20160309/699a6856/attachment.html>