Variations in Projection subclasses public API

[DPeterK]

The public API for each Projection subclass is different. There's a very good reason for this: each one needs to expose different projection-controlling options to the user, but there are downsides as well, including lack of consistency for the user and increased difficulty in producing a generalised repr for Projection.

[DPeterK]

Here's a summary of some of the issues with the CRS API... https://gist.github.com/dkillick/e04760947375031ef4e4b36fe8804b8e

[pelson]

Thanks @dkillick!

Can you clarify what the proposal is here? What do we need to do to call this "done"?

[pelson]

Also relates to #813.

[pelson]

Also of interest: #709