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Re: Coordinates from iPhone

Subject: Re: Coordinates from iPhone
From: "jtudor2005" jtudor2005
Date: Tue Jun 25, 2013 7:04 pm ((PDT))

--- In  Peter Shute <> wrote:
> Thanks for that. I'll have to avoid DMS for now, that's not quite enough =
> I need DMS to enter data into a particular online database I use, and con=
verting coordinates is a nuisance, so I've contacted the authors to see if =
they can add a couple of decimal places to it.

If you use any GPS that can give you 'distance travelled' (whether a cheap =
or highly accurate model) and stand in one spot for a while, you'll find th=
at you have 'travelled' quite some distance. The GPS coordinates will 'wand=
er' over time, so any assumption of precision to 2 decimal places is mispla=
ced. And if you are using it to log recording data, are you logging where t=
he recorder is or the actual sound? So I'm not sure why 2 point precision i=
s necessary. If you take a reading today, and then return tomorrow, you'll =
get a slightly different reading. Also, are you aware that 1 second is only=
 30 metres? So 2 decimal places is 30cm (12 inches) and that will easily be=
 negated by trying to return to the exact same spot at some other time.

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