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Related issue
#1893
Description of changes
The current algorithm is based on https://stackoverflow.com/a/7123291
However, that algorithm fails when checking a point near the center of the polygon.
Just below that answer is https://stackoverflow.com/a/14998816
While I don't love that it still takes a list of lists, I have not changed that in order to maintain backwards-compatibility (see: #1873)
I'm not sure where tests would be added - I don't see any existing tests. Happy to add what's listed in the issue as a regression test if you can point me to where that'd be appropriate.
QA checklists
<summary>
description as well as description of parameters.Reviewers
Not sure who to tag.