d.legend in python loop draws larger background than requestes

Hello all

I'm producing some pngs for an article, using d.mon, d.grid and d.legend in
a python loop. In some of the images, the legend background is fine, but in
others, the background rectangle is way larger than what I defined.

This is an example of the loop:


araca = ['tdx12_Araca', 'tdx30_Araca', 'srtm30_Araca', 'aster30_Araca',
'aw3d30_avg_Araca']
area_name = area[0].split('_')[-1]
for dem in area:
    grass.run_command('g.region', raster=dem, flags='pa', res='0:0:01')
    out_shade = dem + '_shade_315_20'
    grass.run_command('d.mon', start='png', output=dem+'.png', resolution =
'2', height=600, width=600, overwrite=True)
    grass.run_command('d.shade', shade=out_shade, color=dem)
    grass.run_command('d.grid', size='0.25', text_color='white',
color='white', border_color='white', flags='c')
    grass.run_command('d.legend', raster=dem, flags='sb', at='4,25,2,4',
font='Helvetica', \
        fontsize=12, bgcolor='240:240:240', range=(0,1500), units=' m')
    grass.run_command('d.mon', stop='png')
    print('PNG export OK. map: ' + dem)


This are examples of the results, note the legend background.


https://www.dropbox.com/s/skecv5lpxza7led/tdx30_Araca.png?dl=0
https://www.dropbox.com/s/szbmq5kqinfbiff/aster30_wgs84_Araca.png?dl=0



I've run this same script previously without any issues.

Any hints on why this is happening are greatly appreciated.

Carlos




-- 
Prof. Carlos Henrique Grohmann
Institute of Energy and Environment - Univ. of São Paulo, Brazil
- Digital Terrain Analysis | GIS | Remote Sensing -

http://carlosgrohmann.com
http://orcid.org/0000-0001-5073-5572
________________
Can’t stop the signal.

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