Re: Garmin Edge 305, anyone use it?

joseph.santaniello@xxxxxxxxx wrote:
On Apr 16, 12:42 pm, Jason Spaceman
<notrea...@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
I noticed that one of the Paris-Roubaix riders used a Garmin Edge 305
GPS/cyclocomputer yesterday (seehttp://tinyurl.com/2hyjfm).

Has anyone tried these? How do they calculate altitude data? Using
GPS, or using some sort of barometric sensor to measure changes in
air pressure? And which would be the more accurate of the two?

Also, does the Edge 305 record your route and let you download it
afterwards and plot it with Google Earth?

J. Spaceman

A freind of mine has one. It uses both to determine altitude, but he
complains it does not have a manual calibration feature. Like he knows
how high his house is, but it always tries to do it itself, and since
his rides start out with some immediate up and downs, and weather
shifts, it takes a while to for the altitude measurement to settle
down and sometimes is off a bit.

Ah another "Edge Annoyance".

Garmin's hand-held units with a barometric altimeter have a manual
calibration function.
They also have the automatic "keep it adjusted by reference to error range
on GPS height", which is very clever.


Other "Edge Annoyance" I know is that you can't get the current position on
the screen in any sensible coordinate system. So, if you were referencing a
paper map for navigation, its seriously deficient compared to a hand-held
GPS.




- Nigel (GPS user for cycling, but its a Vista Cx )


--
Nigel Cliffe,
Webmaster at http://www.2mm.org.uk/


.

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