[georss] was kml reference placemarks - now KML into OGC

[Andrew Turner]

Joshua Lieberman <josh at oklieb.net> wrote:
> Also, the KML placemark
> overlaps strongly with GeoRSS tags, except that the altitude
> semantics are strangely undefined in the placemark.
>

They're not "undefined" - they're just part of the 3-dimensional
coordinates (optionally). Which is nicer than GeoRSS in that it lets
you easily define 3-dimensional lines/paths. And when you do use
altitude, you can specify if it means relativeToGround or absolute
(default assumes clampToGround)

It's actually one of the things I like about KML :)

Andrew