Added lat/lon labels and grid lines

[adityarn]

This is in response to an open issue raised as part of the COSIMA 2025 Hackathon. I've added latitude and longitude gridlines and tick labels to the plots.

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[edoddridge]

Rather than linking to the issue, if you type something like closes #575, then the issue will be automatically closed when this PR is merged.

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edoddridge commented on 2025-09-09T05:07:57Z
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Line #7.    gl = ax.gridlines(draw_labels=True)

The specification for which labels to draw isn't working perfectly at the moment. There are two labels that still get plotted on the right (60°N and 60°S) despite the

gl.right_labels = False # turn off right labels line.

Unfortunately it seems like there is an issue with cartopy that is making this hard to fix. I think it's probably fine to have the 60° labels printed on the right - they don't get in the way of the colour bar and I haven't been able to work out how to have them only on the left.

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edoddridge commented on 2025-09-09T05:07:57Z
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Line #44.            0, 0.95, "(" + string.ascii_lowercase[n] + ")", transform=ax.transAxes, size=16

The subplot labels look a little squished to me - I'd be tempted to bump them up a little farther.

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edoddridge commented on 2025-09-09T05:07:58Z
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Adding lines and labels to this plot?

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edoddridge commented on 2025-09-09T05:07:59Z
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Add lines and labels to this plot?

[edoddridge]

Rather than plotting all the labels and then turning off some of them, you could change the specification in the call to be:
gl = ax.gridlines(draw_labels=['left', 'bottom', 'x', 'y', 'geo'])

[navidcy]

Also, @adityarn you should add your details in the .zenodo.json file.

[adityarn]

Thanks Ed and Navid. I'll work on the edits and uupdate the PR soon.