[Middle-aged, slow, stubborn, dogged and independent]
Wow, if you can't stay on the track while running I would hate to see you drive.
It's a software thing, I've been using Garmin Fit on the iPhone for my bike rides and it does that all the bloody time and always disagrees with the computer on the bike as to how far I've gone.Also at one point on my ride in today it has my speed at 4964.3mph. I mean I'm good but...
Well you're assuming that the satellite image is 100% correlated with the GPS data on the map. THe fact that it's the same amount out on every single lap suggests there's more at play than just GPS drifting - if that was the case your laps would be some on the track, some off, not the same error on every lap.
's both satellite images - Bing and Google. AAAND... the route there and back is 6.1km and I did 10 laps of a 400m track. That doesn't add up to the 11.28km Garmin says I did.
Turns out that I was A. being thick (running in lane 6 gives you 437.7m per lap) and B. relying on an inaccurate route-mapping service for the rest of the route. Google maps agrees pretty well with Garmin. Nothing to see here. Move along. Move along.