add proj centroid

[philvarner]

Related Issue(s):

• n/a

Proposed Changes:

1. Add Projection Extension field proj:centroid

PR Checklist:

• I have added my changes to the CHANGELOG or a CHANGELOG entry is not required.

[philvarner]

These tests pass locally, but fail in CI, so I'm going to have to figure out what the difference is.

[gadomski]

These tests pass locally, but fail in CI, so I'm going to have to figure out what the difference is.

I'd look at shapely version first?

[philvarner]

That was my thought too

[philvarner]

I don't think is shapely -- for whatever reason, the calculation of the centroid returns an empty point, and I can't repro it locally, even after creating that same conda env 🤷🏻

[gadomski]

I don't think is shapely -- for whatever reason, the calculation of the centroid returns an empty point, and I can't repro it locally, even after creating that same conda env 🤷🏻

Next place I'd look is GEOS errors/warnings. I've seen times when libraries might not link up correctly, but it doesn't error on import; instead, it'll just break behavior in weird ways.

many changes