using grants coords in message 11495 & the great circle
calculator
atchlin to atchlis is just under 15 miles
& adesfre to adesfrw is just over 16 miles
but there is some question about the latter positions
so technically the jury may still be out
but you guys are probably right
--- In
BoundaryPoint@yahoogroups.com, Michael Kaufman
<mikekaufman79@y...> wrote:
> The two AT-CH-LIs?
>
> --- Jesper Nielsen <jesniel@i...> wrote:
> > I know which two tps are the closest (not counting
> > the bwnazazw mess)
> >
> > Jesper
> > ----- Original Message -----
> > From: "Lowell G. McManus" <mcmanus71496@m...>
> > To: "Boundary Point" <boundarypoint@yahoogroups.com>
> > Sent: Wednesday, March 10, 2004 5:49 PM
> > Subject: Re: [BoundaryPoint] Re: How far is it?
> >
> >
> > > If one wanted to determine the two tripoints that
> > are farthest apart, one
> > should
> > > first determine which few pairs are the most
> > likely candidates based on
> > their
> > > relative antipodality from each other. This would
> > take some trial and
> > error.
> > > However, since the antipodes of most continents
> > are oceanic, there
> > shouldn't be
> > > an abundance of likely candidates.
> > >
> > > Next, the few candidates might have to be
> > evaluated for the effects of the
> > > spheroidicity of the earth and for elevation. The
> > earth is an oblate
> > spheroid,
> > > bulging at the Equator and flattened at the poles.
> > However, the
> > difference
> > > between sea level diameters pole-to-pole and
> > Equator to Equator is
> > typically
> > > stated in the range of 40 to 43 km. The
> > supposedly most precise model
> > pegs the
> > > figure at 42,952 meters, which is less than 27
> > miles. On top of this
> > distance,
> > > elevation could add a few more miles if one found
> > a pair of relatively
> > antipodal
> > > tripoints both in high mountains. Elevation would
> > most affect diametric
> > > distance and would be much less significant
> > circumferentially.
> > >
> > > Considering the relative paucity of land-land
> > antipodes and the relative
> > paucity
> > > of tripoints near the poles, the variations due to
> > spheriodicity and
> > elevation
> > > above sea level would probably be inconsequential
> > in determining the two
> > most
> > > interdistant tripoints.
> > >
> > > At http://williams.best.vwh.net/gccalc.htm , you
> > will find yet another
> > > great-circle distance calculator into which one
> > can enter the coordinates
> > of any
> > > two points and get their circumferential distance
> > apart. This calculator
> > > differs from the others in that you can chose from
> > various mathematical
> > models
> > > of the shape of the earth, from perfectly
> > spherical through a number of
> > > spheroidal models. Among these last, the one
> > currently accepted is
> > > WGS84/NAD83/GRS80.
> > >
> > > Lowell G. McManus
> > > Leesville, Louisiana, USA
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "acroorca2002" <orc@o...>
> > > To: <BoundaryPoint@yahoogroups.com>
> > > Sent: Wednesday, March 10, 2004 8:31 AM
> > > Subject: [BoundaryPoint] Re: How far is it?
> > >
> > >
> > > > really
> > > > i dont remember that
> > > >
> > > > & it is an interesting question
> > > > as well as a challenging try pointing quest
> > > >
> > > > perhaps even 2 of each
> > > > since the farthest pair of points measured
> > circumferentially
> > > > might not be the same points as the
> > diametrically farthest pair
> > > >
> > > >
> > > > yet exactly how to solve for either set
> > > >
> > > >
> > > >
> > > > alternatively
> > > > someone may already have solved & posted answers
> > for them
> > > >
> > > > so perhaps a prior question is
> > > > exactly how to search for any such ready made
> > answers
> > > >
> > > >
> > > > &or
> > > > failing that
> > > > there must be some data on the geoid already
> > developed &
> > > > available somewhere that might be useful toward
> > these ends
> > > > if we knew what to look for
> > > >
> > > > like
> > > > greatest circumference & diameter figures might
> > be a good
> > > > place to start
> > > > since these are likely to have been worked out
> > to some degree
> > > > of specificity & accuracy
> > > >
> > > > but where & how to find them
> > > >
> > > > & could we in fact approach the correct answers
> > via these data
> > > >
> > > > & if so
> > > > by exactly what means could we get there from
> > here
> > > >
> > > >
> > > >
> > > > but can anyone solve or advance this
> > > >
> > > > or even clearly see the right way to go
> > > >
> > > >
> > > > --- In BoundaryPoint@yahoogroups.com, "L. A.
> > Nadybal"
> > > > <lnadybal@c...> wrote:
> > > > > We discussed some time back the maximum
> > distance that any
> > > > two places
> > > > > on earth could be from one another.
> > > > >
> > > > > This site claims to deliver the distances
> > between two selected
> > > > points:
> > > > >
> > > > > www.indo.com/distance/
> > > > >
> > > > > LN
> > > >
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
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