Website for accurate road gradients
11-22-20, 08:50 PM
#26
just another gosling
Join Date: Feb 2007
Location: Everett, WA
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Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004
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according to the garmin site the model 200 and 25 do not have a barometric sensors.
https://buy.garmin.com/en-US/US/p/90675#specs
https://buy.garmin.com/en-US/US/p/508489#specs
this is why in one of my earlier posts i mentioned model and vintage. looks like the latest collection of edges all have the sensor now.
looking over the garmin site the prices of these are not too bad. there might be an edge in my future now...
https://buy.garmin.com/en-US/US/p/90675#specs
https://buy.garmin.com/en-US/US/p/508489#specs
this is why in one of my earlier posts i mentioned model and vintage. looks like the latest collection of edges all have the sensor now.
looking over the garmin site the prices of these are not too bad. there might be an edge in my future now...
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02-04-21, 09:42 PM
#27
Full Member
Thread Starter
02-18-21, 05:40 PM
#28
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Join Date: Apr 2005
Location: Ann Arbor, MI
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Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8
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GPS altitude data is OK, but never great. For the curious, do some research on the ASTER Digital Elevation Model. I have quite a few altimeter / barometer apps on my phone, including one that reports ASTER altitude using GPS location lookups. It's also interesting to lock (calibrate) a barometer app to local airport readings (quite accurate), then get differentials computed for iPhone readout (Hunter Research makes one). All kinds of things to experiment with, but at the end of the day, you can get some good comparative / relative numbers for your rides, but nothing you'd use to land a plane. Not at a cyclist-friendly price, anyway.
