I'm not sure when the RDFIG/SWIG basic geo SpatialThing vocabulary started
to be taken so seriously!
https://www.w3.org/2003/01/geo/ and https://www.w3.org/2003/01/geo/wgs84_pos
were just a bunch of us from the W3C RDF IG / Semweb IG collaborating in a
few IRC chats, as a result of our having noticed that a lot of us had made
up similar-looking RDF schemas that defined lat/long-related properties.
The main lesson from that exercise was that people will adopt something and
assume it has had careful review, merely because it is on w3.org. It took
quite a while (~3 years!) before someone noticed that we defined an 'alt'
property without saying what it means. Please don't tie yourself in knots
trying to coordinate with it; instead consider any modest improvements we
could make to its documentation (including pointers to later work from this
group or elsewhere).
Dan