Re:The perfect phone for a birder?

To: Peter Shute <>
Subject: Re:The perfect phone for a birder?
From: Damian Kelly <>
Date: Mon, 28 Dec 2009 08:11:52 +1100
Archaeolgy work requires better accuarcy than 10m. If you are leaving finds in situ (as we were) to study long term erosion and to return for photography (my role) then 10m is not much good.

Sent from my iPhone

On 28/12/2009, at 5:02, Peter Shute <> wrote:

Regarding GPS accuracy, my phone generally claims the coordinates are within 10m, sometimes much lower, occasionally higher. I would imagine that's easily good enough for finding most birding locations again, what kind of accuracy are you talking about?

I'm under the impression satellite signals are deliberately encoded to prevent civilians getting too much better accuracy than that, for military reasons, including making it hard to pinpoint the location of the actual satellites in order to shoot them down. To get better accuracy (precision might be a better word), I think a long succession of coordinates must be averaged. This may be what the more expensive gear does.

Not so very long ago, GPS wasn't even an option. The alternative for those without access to expensive electronic distance measuring equipment was a tape measure or triangulation. In my opinion, the decision by the USA to release even this level of accuracy to civilians is absolutely wonderful, even if it does occasionally lead you back to the wrong side of the creek.

Peter Shute

Sent using BlackBerry

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU