At work so today’s walk was a few laps around the main building at work. I tracked the walk with Endomondo running on my phone, which was in my pocket.
As I was walking around the previously measured 1/4 mile course, I noticed that Endomondo was claiming that I hadn’t walked as far as I should have.
Back home, post-walk, I downloaded the track (in blue) and superimposed the actual route followed (shown in red.) As you can see, there is some discrepancy.
- The route (16 laps) should be 4.00 miles
- The reported route was 3.66 miles
- I ‘lost’ 0.34 miles during a 4 mile walk – a loss of 8.5% !!!
- GPSs are quite accurate in straight lines (I did lots of turns)
- Accuracy depends on location of the device on the body (trouser pocket)
- Smartphones are generally better than dedicated GPS watches
- The most accurate is… drumroll… the footpod (once calibrated)