[gps-talkusers] Re: 300 feet off 33 okay

Hi,
Chris writes:

the distance to intersections is mesured from the center of the
intersection.
So if you are on the corner of the intersection and gps says you are 180
ft from it, that's the distance to the center of the intersection. of
course put a margin in for gps errors.
So if you are factoring in a margin for error, what do you look at? Let's say you do the check and it says something like "19 feet, 8 satellites". Does that mean that the center of the intersection could be as close as 161 feet or as far as 199? Or do you look at h.dop and v.dop and infer from those numbers? I hope this isn't a silly question. 

Tom

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