Polar's Altimeter vs Google Earth's Elevations

Quoted message said:

Which do you think is more accurate
(for relative elevations only) ?

http://www.polarusa.com/Products/consumer/s720.asp

http://earth.google.com

Google; their data is derived from radar altimetry, while the Polar
S720 uses a barometer.

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary

Kinky Cowboy <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

Google; their data is derived from radar altimetry, while the Polar
S720 uses a barometer.

I disagree. Most map-based altitudes are averaged over an area and if
you are biking on a road in a hilly area, the road is generally lower (on
average) than the surrounding hills. Over short distances, I think a
properly calibrated barometric altimeter is more accurate.