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Let's think about the GPS capabilities.
1) How accurate is calculated speed from GPS? Can I calibrate my SG to GPS. Right now my Speedo and my SG are different by 1.5-2%. I don't know which is more accurate.
2) I don't need all the street/turn stuff. I need to know how far I traveled since I hit the button. What was my change in "altitude" since start. I'm I heading uphill right now or downhill and by what percentage. I want to save GPS start and end points so I can collect A-B-A testing data automatically.
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