GPS altimeters

[creadinger]

So barometer based altimeters on Garmin devices are generally agreed to be more accurate (or maybe more precise, or maybe both) than the altimeters using just the GPS satellites, but I’ve never seen anything like this before.

This is the elevation profile someone else registered on their barometer based altimeter Garmin device of the ride we did this past Saturday. It was a loop, starting and ending at the same point, but the Garmin thinks the end point was 150ft higher than the start due to the low pressure system moving closer to the area during the 10 hours it took to do the ride. That’s a pretty huge difference. And it’s not like you can even use this data in a relative sense because who knows when it began to skew too high. The elevation profile I recorded on my Garmin ranged between about 10 ft – 220 ft.

[ATTACH=CONFIG]2462[/ATTACH]

So what do you do with your fancy barometer based altimeter when the weather is really dynamic?

Topic

[mstone]

@sjclaeys 44864 wrote:

My Garmin always shows about a 250 feet increase elevation from when I finish my ride into work in the morning and then leave in the evening.

Nobody will be impressed by your story of how you had to ride downhill both ways…

[sjclaeys]

@mstone 44867 wrote:

Nobody will be impressed by your story of how you had to ride downhill both ways…

Since I go back to North Arlington, the Garmin still shows a climb!

[Author]

Replies