naturerecordists
[Top] [All Lists]

## Re: Coordinates from iPhone

 Subject: Re: Coordinates from iPhone "Peter Shute" pshute2 Tue Jun 25, 2013 8:12 pm ((PDT))
 ```jtudor2005 wrote: > 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 that you have 'travelled' quite > some distance. The GPS coordinates will 'wander' over time, > so any assumption of precision to 2 decimal places is > misplaced. And if you are using it to log recording data, are > you logging where the recorder is or the actual sound? So I'm > not sure why 2 point precision is 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. So you don't think it's worth recording even to 0.1". i.e. 3m? I've watched= my previous phone continue tracking when I'm stationary, but I would have = said it was mostly moving around within 5m of me. Even if it was 10m, I wou= ld have thought recording to the nearest 1" (30m) would be throwing away so= me usable precision. I've also done a little geocaching, and the coordinates supplied often get = me within metres of the caches. Peter Shute ```
 Current Thread Coordinates from iPhone, Peter Shute Re: Coordinates from iPhone, Mike Rooke Re: Coordinates from iPhone, jtudor2005 Re: Coordinates from iPhone, Peter Shute Re: Coordinates from iPhone, Mike Rooke Re: Coordinates from iPhone, Peter Shute Re: Coordinates from iPhone, jtudor2005 Re: Coordinates from iPhone, Peter Shute <= Re: Coordinates from iPhone, Keith Smith Re: Coordinates from iPhone, jtudor2005 Re: Coordinates from iPhone, Keith Smith Re: Coordinates from iPhone, Peter Shute Re: Coordinates from iPhone, Keith Smith Re: Coordinates from iPhone, Peter Shute Re: Coordinates from iPhone, Max Catterwell Re: Coordinates from iPhone, michael trommer Re: Coordinates from iPhone, Keith Smith Re: Coordinates from iPhone, Peter Shute