Imagine viewing a web page with a reference to a landing site on The Moon- and being able to use an add-on to you browser to be taken directly to that site, in a lunar mapping application of your choosing, or on a site like Google Moon. Or being able to search, easily, for web sites referring to the same site, without seeing places on Earth with co-incidentally similar coordinates.
Those are just two of the things a "luna" microformat, based on the existing Geo version, might do for you.
Here's some work-in-progress:
This proposal has now been merged with that for Mars, as:
- geo-extension-nonWGS84 - a possible implementation
- Andy Mabbett (proponent)
- mars - the same sort of thing, for the planet Mars