This question makes perfect sense, How do I select distinct json columns? It's not my question, but it's totally valid. I even answered it.
Do you just want coordinates or whole rows with distinct coordinates? In the later case you need to define which row from a set of peers. Also, please always provide table definition and Postgres version.
That comment was posted two days ago and the OP didn't clarify their question. When a poster is unresponsive and the question is unclear then it feels like closing is an appropriate move.
Amazingly right as I posted this the OP edited their post. Hopefully the OP clarifies the question to a point we can reopen it.