I'm confused about the following basic points:
- Do lat/long points have a projection or are they projection agnostic?
- Do these points live in a sphere or a plane?
I understand that projections are used to transform a spheroid into a plane while attempting to minimize artifacts along desired attributes (e.g. distance).
Is a lat/long measurement agnostic to projections in the sense that it captures some sort of "absolute position" on Earth?
If it is in fact agnostic (if the point lives in the spheroid), is this the reason why we use havesine to calculate distances?
How do CRS come into play when dealing with lat/long coordinates?
I seek feedback on misconceptions and pointers to material to learn about this stuff.