Very exciting! Thanks for giving the community an early preview. GeoRSS supports altitude and accuracy measures for point locations as well. in GeoRSS-Simple, it's something like
<georss:point>45.256 -110.45</georss:point> <georss:radius>500</georss:radius> <georss:elev>313</georss:elev> (at that lat/long, within 500 meters, at an elevation 313 meters above the WGS84 ellipsoid). Any plan to support that in the Twitter API? Radius is very useful for dealing with inaccurate geolocation, and elevation (or <georss:floor>) can help distinguish exactly where someone is. These links may be relevant to the discussion: W3C Geolocation API: http://dev.w3.org/geo/api/spec-source.html (Javascript API to location. Safari supports this nicely on the iPhone.) iPhone CLLocation API: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocation_Class/CLLocation/CLLocation.html Both APIs specify position as latittude, longitude, horizontal accuracy, altitude, and vertical accuracy.
