https://www.gps.gov/systems/gps/performance/accuracy/
There are many things that contribute to accuracy of GPS, only some of which relate to the device and some of which relate to the user. Even in what I consider the most controlled circumstances that I can provide, there is considerable variability.
Use Case 1 - Stem Mounted, Garmin 520 Cycling GPS and my last 100 bicycle commutes to work, all following the same route. I zoomed in on a corner as that had the largest amount of visible deviation.
Use Case 2 - Pocket Mounted Apple iPhone 6s and my last 100 times walking my dog in the neighborhood. Again I zoomed in on a corner.
There aren't walls or cliffs or other obstructions in these corners. There are leafs and ice and snow and other seasonal changes.
Use Case 3 - Backpack mounted Garmin 76CSx, Out-and-Back in a snowshoe track.
FWIW,
Tim
There are many things that contribute to accuracy of GPS, only some of which relate to the device and some of which relate to the user. Even in what I consider the most controlled circumstances that I can provide, there is considerable variability.
Use Case 1 - Stem Mounted, Garmin 520 Cycling GPS and my last 100 bicycle commutes to work, all following the same route. I zoomed in on a corner as that had the largest amount of visible deviation.
Use Case 2 - Pocket Mounted Apple iPhone 6s and my last 100 times walking my dog in the neighborhood. Again I zoomed in on a corner.
There aren't walls or cliffs or other obstructions in these corners. There are leafs and ice and snow and other seasonal changes.
Use Case 3 - Backpack mounted Garmin 76CSx, Out-and-Back in a snowshoe track.
FWIW,
Tim
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