Q1. The point to point distance is the same, but the distance travelled by kerb-hugging would be longer.
Also, you don't say the width of the road nor how far out from the kerb the bike is riding, so it's impossible to determine the actual distance travelled.
However, in your 10 miles, there are only 4 and a half completed waves from one side to the other, and assuming a relatively normal width road (but which is straight enough for there to be a line between point A to point B that doesn't clip any apexes) the deviation will be miniscule.
Q2. No. GPS head units sample position periodically, some will store the position determined at every "tick", and some only store those ticks that correspond to changes of direction and/or pace. Even if you had two GPS units of the same brand on the same bike, they will almost certainly poll their position at different phases along the "wave" on your road, which causes different amounts of distortion.
I've attached a screenshot of one of my Strava activities going round a track, and that's just one one head unit. Look at the deviation from lap to lap. Over enough laps it gets enough samples to get an idea of the shape and length of the track, but individual laps look like asymmetric hexagons.
Also, you don't say the width of the road nor how far out from the kerb the bike is riding, so it's impossible to determine the actual distance travelled.
However, in your 10 miles, there are only 4 and a half completed waves from one side to the other, and assuming a relatively normal width road (but which is straight enough for there to be a line between point A to point B that doesn't clip any apexes) the deviation will be miniscule.
Q2. No. GPS head units sample position periodically, some will store the position determined at every "tick", and some only store those ticks that correspond to changes of direction and/or pace. Even if you had two GPS units of the same brand on the same bike, they will almost certainly poll their position at different phases along the "wave" on your road, which causes different amounts of distortion.
I've attached a screenshot of one of my Strava activities going round a track, and that's just one one head unit. Look at the deviation from lap to lap. Over enough laps it gets enough samples to get an idea of the shape and length of the track, but individual laps look like asymmetric hexagons.
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