Why does spherical_geometry need the inside point?

[arbenede]

I am debugging a bug very similar (if not the same) as in #278 and after studying the code I wonder why does spherical_geometry need to store and manipulate the inside point. Given a list of points, we can pick among the two possible choices the one which gives the polygon with positive area as calculated by SphericalPolygon.area(). So the ordering of the points (CW or CCW) will implicitly determine the polygon. Or I am missing something?

[zacharyburnett]

At the moment, a SphericalPolygon can be CW or CCW. This might add unnecessary complication but that's how it is now. Additionally, the current implementation of point-in-polygon requires an interior point, unless I'm mistaken