Subject: Re: double line bug & nautical miles
Date: Nov 24, 2001 @ 03:41
Author: orc@orcoast.com (orc@...)
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> > west of wlong 124d 05m 00s 00000 presumably nad83dyou mean you need to know the freakin latitude too well of course ahem it is n46d15m precisely to as many digits of zero as you like & i had thought we were absolutely talking due west here rather than loxodrome due west if that is what you mean but i confess i am already dizzy to think about the difference between the 2 so maybe you can add your opinion of what this fairly conventional legalese federally approved interstate compact must really mean even sight unseen considering our divinity
> What latitude? And are we talking west-along-that-parallel or west-from-
> there-along-the-great-circle?
>hahahahahahahahahaha
> > in 1954 they were probably conceited enough to think they were
> splitting the
> > atom but in 2001 all these 5 digits are given with real feasibility by
> the best
> > gps receivers arent they
> Um. Well... 0.00001 times 1ft (~30cm) is ~3 *microns*, for goodness
> sake. I can't think of a way to hold anything that *steady* at sea, even
> if the GPS sats were honed in tight enough.
> It would be crazy to come up with a conversion factor like that out of
> the blue. There must've been some intermediate stage, some standard that
> was measured out in imperial units, some calculation that was done by a
> hair-splitting jobsworth somewhere.
>
> Grant