- From: Andrei Popescu <andreip@google.com>
- Date: Tue, 14 Oct 2008 16:32:04 +0100
- To: "Angel Machín" <angel.machin@gmail.com>
- Cc: public-geolocation@w3.org
Hi Angel, On Tue, Oct 14, 2008 at 10:39 AM, Angel Machín <angel.machin@gmail.com> wrote: > Hi Andrei, > >> But there, I'd propose something like "vertical speed" >> (e.g. an app showing how fast is someone going down a ski slope would >> likely to be interested in that more than the azimuth). >> > > The problem with vertical speed is that it can't be easily calculated. > GPS devices are accurate in 2D positioning but they fail in calculating > vertical speed and positioning. In fact, many GPS devices used in aviation > contain a barometric altimeter to indicate vertical speed. > (http://wiki.motionbased.com/mb/GPS_Barometric_Altimeter) > That's ok, it'd be only an optional field, populated only by those implementations that can determine it. The question is whether it is useful enough to add it to the spec. Andrei
Received on Tuesday, 14 October 2008 15:32:49 UTC