doh
5 miles
no wonder the jury was still out
--- In
BoundaryPoint@yahoogroups.com, "Jesper Nielsen"
<jesniel@i...> wrote:
> Yes!
> ----- Original Message -----
> From: "Peter Smaardijk" <smaardijk@y...>
> To: <BoundaryPoint@yahoogroups.com>
> Sent: Thursday, March 11, 2004 8:52 AM
> Subject: [BoundaryPoint] Re: How far is it?
>
>
> > AMAZTR & AZIRTR ?
> > Peter S.
> > --- In BoundaryPoint@yahoogroups.com, "acroorca2002"
<orc@o...> wrote:
> > > 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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