By 'read-only' I mean its not easy for people to supply location information thats current. I put into Lokenote app an expiry date tumbler - eg. Street party for a few hours, blocked drain for a few days, building site for a few weeks.
Because of overhead at the moment, youd probably only enter location information that is going to be there for a long time.. but if it were easier to share that, wed see a more dynamic and relevant picture over smaller time scales.
Wikipedia, etc, have made an effort to standardise so that wiki articles can be tagged to a location, but I think theres a whole mass of less formal information thats really useful thats not being captured or used - ants would leave pheremones to signal other ants, we currently leave paper notes on lampposts, there should be a better way.