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Re: Coordinates from iPhone

Subject: Re: Coordinates from iPhone
From: "Peter Shute" pshute2
Date: Wed Jun 26, 2013 11:10 am ((PDT))
On 27/06/2013, at 12:22 AM, "Keith Smith" <> wrote:=0D
> If you enjoy the extra precision, go for it. Just don't confuse it with=
> accuracy. You may have readings 0.01" or better and a limit of +/-5 - 30m=
> at the same time, so it gets misleading. It will also depend on your=0D
> location and topography, how many satellites can see you, and weather=0D
> systems. I suspect you may enjoy somewhat better repeatability in .au tha=
> I do in .ca.=0D
I must admit I haven't tried the iPhone's GPS much yet, and it may turn out=
 that it's not as good as my Blackberry was. In an ideal world we would all=
 record measurements to a precision matching their accuracy, but I suspect =
most of us simply record whatever the display says, for the sake of consist=
ency. Eg so we can be sure the last bit isn't missing simply because we for=
got to record it.=0D
In the case of this MotionX app, I suspect it only displays to the nearest =
second in DM=C5=9A format for cosmetic reasons. The D and DM formats displa=
y to the equivalent of 0.0036" and 0.006", ie they've just displayed what f=
its nicely. Hopefully they'll squeeze in another dp in the DM=C5=9A format,=
 and I'll be happy.=0D
Peter Shute

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