I appreciate that, but still, I ask that you not overfit trails to GPS for the reasoning I provided above. GPS helps a lot, but aerial imagery is going to give better resolution. Looking around nearby GPS traces on roads, you can find examples of drift and distortion, and that is only going to be more prevalent with the conditions in hiking areas. If we are confident that the trail alignment has changed since imagery was taken, then I would disregard that imagery, but I don't think that's the case here.