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Subject: Re: Sextant Positions versus Map Datums?
From: Rodney Myrvaagnes (rodneym@XXX.XXX)
Date: Tue Jan 15 2002 - 23:33:02 EST
On the Texas web site, those two are very close together. Look at
http://www.Colorado.EDU/geography/gcraft/notes/datum/gif/shift.gif
Nobody could distinguish NAD27 from WGS84 with a sextant in Austin.
Is there really a place where they are a mile apart?
On Tue, 15 Jan 2002 19:50:53 -0500, Jared Sherman wrote:
>Peter-
> <the horizontal difference is not significant ...the vertical. True?>
>
>Nope. Go from NAD27 to WGS84 and the world can move a mile instantly. How much it moves, and which way it moves, depends
on the datum change and also on your position on the chart, i.e. some places "move" less than others.
Rodney Myrvaagnes J36 Gjo/a
"Religious wisdom is to wisdom as military music is to music."
"What contemptible scoundrel stole the cork from my lunch?" -- W. C Fields
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