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

No it isn't. How ever here is a theory to try to test. Find several intersections that you are familiar with. Make sure that some are really big, and some are small. Then check the GPS talk readout at each intersection, and see what the distance reporting is. I have a Trekker, and it doesn't tell you how far away the intersections are, so I can't try it myself. ----- Original Message ----- From: "Tom Lange" <trlange@xxxxxxxxxxx> 
To: <gps-talkusers@xxxxxxxxxxxxx>
Sent: Wednesday, March 14, 2007 11:34 PM
Subject: [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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