Refactor Projections into real-distances
Current version of FEDS relies on espg's with lat and lon. At high latitudes, using lat and lon introduces errors by distorting the spatial operations. In high latitudes, FEDS needs to work with real distances to behave sensibly. Beyond high latitude systems, it would make sense to generalize this part of the code so that users have more control over how space is interpreted.
Rebecca implemented this for her version, for reference.