Hey @mlennert . I am pinging here people from @team-tracker to see if they can provide any feedback.
What I think you could do, which not sure if would accomplish what you want for later operations (maybe mapping) is creating TEI Attrinutes and/or DataElements (of the type Coordinate) compulsory to prevent users being able to save the TEI or the event if those are not filled in.
For example, this is for a DE:
AFAIK later on you could use that points on the maps via selecting a specific DE in the layer creation.