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10

GPS is simply not a good way to measure trail distance. This is because the raw GPS fixes have a lot of noise on them. If you take them literally, then you get a much longer distance than you actually moved. If you low pass filter them too much, you cut off corners and get a shorter distance. The usual algorithm is to apply some low pass filtering, but ...


8

There are two main things that can go wrong with gps accuracy. The first is the quality of the signal, which can be less than for a dedicated gps unit (less space for an antenna and other design compromises). Of course the question of how you carry it comes into play here (a low pocket isn't very good and this may be worse than with a dedicated unit ...


5

We have an article about this topic, since Gaia GPS users frequently ask - why GPS recording can be inaccurate. The short answer is, as others have said, GPS isn't perfectly accurate. If you compare a GPS measurement to a measurement from a measuring wheel, there will be a discrepancy in stat calculations, regardless of GPS chip or post-processing ...


3

I have the $0.99 app, "Footpath Route Planner - Running / Cycling / Hiking Maps". ref: https://itunes.apple.com/us/app/footpath-route-planner-running/id634845718?mt=8 I end up using RideWithGPS on the desktop to map all my bike, run, hike routes but if you're looking for just an iOS version, this is certainly the nicest UI and UX that I've found. Both ...


2

While it surely is possible to pair the watch with several HR monitoring devices, I don't think it's possible to use more than one at the same time. I cannot tell for sure since I don't have an Ambit3 (which uses the Bluetooth Low Energy protocol to connect external sensors, as far as I remember) but only an Ambit2 (which communicates via ANT+) but in the ...


2

Garmin Basecamp is a free application that allows people to share tracks for various activities. I have found a ton of trails this way. http://adventures.garmin.com/



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