Originally Posted by
wphamilton
The equipment could change. The road could change.
The road could change??? You're really reaching now. (Even if the road did change, that would make GPS look
worse than it really is.
)
All routes within a set should be the same. Don't cherry-pick the type of route to test. I get the feeling you're just being argumentative, because with a moment's thought you would have seen all this.
Cherry picking? You specifically proposed the following:
Originally Posted by wphamilton
If anyone is turned off by all the theory and math, it's pretty easy to compare precisions for yourself. Ride the same route a number of times and see how the GPS distance estimate varies ...
I did exactly what you proposed, and I did it by choosing a route that I had ridden many times with a consistent beginning and end. I'm not going to go out and repeat a bunch of routes of varying distance and terrain to satisfy your curiosity. Do it yourself.