Curt wrote:
What about NAD83? I know that's very close to WGS84, but that's only for NA right? If someone on the other side of the world was reporting NAD83 datum then the error between it and WGS84 could be significant, right? Is NAD83 available world-wide? Could I be in Japan or Europe and have a Garmin or Magellan GPS read out my position in NAD83?
I guess nothing is stopping you from using a datum outside its intended area, at least when one is talking about geographic coordinates and not plane coordinates. Do note that Bob's spec has designated datum byte N to mean NAD27, not 83. I didn't see a byte allocated for NAD83 in Bob's documentation.
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