RE: gps AND maps

To: "'George Appleby'" <>
Subject: RE: gps AND maps
From: "Conole, Lawrie" <>
Date: Thu, 7 May 1998 10:26:02 +1000
> I think that many comments on Birding-aus have missed the 
> point that regardless of where you may be atlasing or 
> birding generally should will always need maps. A GPS is 
> only a very useful addition to a map collection.
I thought that was a given George, which is why I didn't mention it!!  I
have mentioned in the past though that many of the newer topo maps
(1:100,000) have the UTM grid marked in addition to the AMG - this is a
direct concession to all the GPS users out there.  I understand that
Australia will eventually be shifting away from AMG to a new UTM-based
grid, which will integrate maps/GPS to a greater extent than is
currently the case.  UTM and AMG are not identical; they vary by a
couple of hundred metres, which of course if not far from being within
the error range of the GPS signal degraded by 'selective availability'
(courtesy US DoD).

Cheers, Lawrie

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