The coordinate of a note is the simhash of the note's content.
Look at https://github.com/arkin0x/ONOSENDAI for the simhash impmementation
The coordinate of an event kind is derived differently depending on the kind's purpose. Not all event kinds make sense to portray in a spatial dimension.
Currenly, the only object who's display in cyberspace is well-formed are notes. However, I have several other objects in progress: avatars, constructs, home coordinates, and action chains.