Re: GPS is bad at measuring height
In which case, respectively:
1) If you lose the signal you lose the signal, what's the difference whether it's up, down, left, right?
2) No. Short of a bridge with vertical a car elevator (which would be freakin' awesome) you're still coming in on a physically different road, which is easily distinguished with sufficiently precise data, which this is.
Biting the hand that feeds IT
