Most relays right now are just plain outbox/inbox relays with all kinds of content, so they’re not really suited for direct browsing. Only a few are actually curated by operators or have some special filtering. At the moment I just collect and show them manually on Jumble’s explore page.
Since there aren’t that many, a globe might not make much sense yet. But if we ever get to the point where there are hundreds or thousands of community relays, then exploring them on an interactive globe to find nearby communities could be a really fun experience.