Originally posted by debgary:
One thing we did notice as we went over several high passes on the way home was that compared to Andy's GPS everyone of them was listed at least 12 ft. lower than the GPS readings.
Consumer GPS devices are not accurate enough to resolve altitude differences this small. Depending on the satellite signals, your reading can be off by as much as 100 feet.
My GPS has read as low as -18 and as high as 10 when driving past Redwood Shores on the Peninsula.
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