Add Matplotlib geo projections #1249
Conversation
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Any thoughts on Hammer parameters? It seems like 4.9.3 might be buggy with one of these. |
As in The test is failing with a lot of warnings, but they may be not an issue? The image that now has all of the projections is (copied from Travis): |
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Interest in coming back to these projections? |
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Rebased, but I did not add the other parameters. I'm also not sure if the threshold needs setting nowadays. |
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Oops, created the test images with the oldest supported Matplotlib instead of the latest. |
| .. note:: | ||
| This projection does not handle elliptical globes. |
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It doesn't look like this note appears anywhere in the docs? It seems like all of the init docstrings are left out currently.
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Hmm, maybe it was with the change in doc themes? I don't remember what the older one looked like now.
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We can open up another issue if we want to update the docs later.
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Sorry, I actually meant to merge this in before the release and just forgot. |
Rationale
In Matplotlib, there are 4 builtin geo projections: Aitoff, Hammer, Mollweide, and Lambert. They are not quite as flexible as Cartopy, but work for maps at least. We have the latter two, but not the former.
Implications
This adds Aitoff and Hammer. In proj, Hammer support two more parameters:
+Wand+M. I do not know what these stand for, so I have not added them, but would like to if anyone has any understanding of what they mean.