Yes this would be great and is also part of what I am building in Our World… 
A person’s avatar is placed on the 3d map at their current geo location.
https://chat.holochain.org/appsup/channels/our-world-netclient
Be good if we could collaborate?
I noticed there is no code yet in your repo? Were you planning on adding any or is this simply a placeholder?
It’s a placeholder. I’ve just been opening a new repo when I think of a good idea. I think this one would be fairly achievable and very useful across many apps. Great one to learn how to treat apps as microservices.
To me the most exciting thing is thinking about the data structures necessary to support this sort of thing. For instance, if you want your location to be world-viewable, how do others search for people near them? I’m thinking of a btree-like division of the world’s surface, with each successively smaller tile getting its own anchor. Possibly using something similar to the Collections zome