Lower portion of figure cut off

Q&A PyGMT Q&A
1

I’m using PyGMT in Jupyter Notebook.

My figures – both in the Jupyter Notebook (“fig.show()”) and the saved .png (“fig.savefig(png_file)”) – get cut off towards the bottom.

My general process is:

[1] Set the figure width:
>> fig_width = 20
>> xsize = fig_width

[2] Calculate the figure height:
>> ysize = xsize * ( (region[3] - region[2])/(region[1] - region[0]) )

[3] Set the projection:
>> projection = ‘X{}c/{}c’.format(xsize, ysize)

I usually have a series of maps and charts on a single figure. Invariably the bottom few cm of the final figure is chopped off, so I reduce “fig_width” by trial-and-error until it all fits.

But there are a couple of issues with this:

  • the lower I go, the lower the resolution of the final image
  • I have to reduce FONT and MAP_FRAME_PEN configurations to make things scale
    >> pygmt.config(FONT=‘6,Helvetica,black’)
    >> pygmt.config(MAP_FRAME_PEN=‘0.2p,black’)

I’ve tried increasing the paper size and increasing the resolution:
>> pygmt.config(PS_MEDIA=‘a0’)
>> pygmt.config(GMT_GRAPHICS_DPU=‘600i’)
but neither seems to work.

I’d appreciate advice!

2

Have you try to move your whole figure upwards in the paper? Something like -Y4c to move your figure 4 cm upwards in paper.

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3

Thank you!

You got me on the right path. I was adding subplots from top-to-bottom (with negative yshift values). If I add subplots from bottom-to-top (with positive yshift values), the figures are no longer clipped.

4

FYI this limitation will be fixed with the release of GMT 6.4.0 which allows more room for adding subplots top-to-bottom (https://github.com/GenericMappingTools/gmt/pull/6247).

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