please look for several insertions
--- In
BoundaryPoint@yahoogroups.com, Michael Kaufman
<mikekaufman79@y...> wrote:
> 1. DZLYTN http://www.manntaylor.com/FtSaintM.jpg
> (this could be DZLY and LYTN or just DZLY as per msg.
> 13465)
correct & we still dont know which is true
so you are right to keep counting it or them as either 1 or 2
borders
but this is apparently only a single sweep of arc in any case
> 2. DZLY
>
http://www.law.fsu.edu/library/collection/LimitsinSeas/maps/bs1
b.php
> 3. LYNE
>
http://www.law.fsu.edu/library/collection/LimitsinSeas/maps/bs2.
php
> 4.-15. BJNG (12 of these?)
i still cant be sure
but the following text seems to indicate either 11 or 12
http://www.law.fsu.edu/library/collection/LimitsinSeas/IBS091.pdf
> 16. NENG
>
http://www.law.fsu.edu/library/collection/LimitsinSeas/IBS093.pdf
> (but not evident)
it is evident in the above text
but i think we just havent yet found a good enough map
> 17.-??? MXUS (msg. 13937; how many are there?)
unknown
but i believe only 1 has been reported so far
& suspect the 1970 mxus treaty will reveal all
if there are any others
> SO,
> We can't put a firm number on it. Depends on 3
> variables:
> 1. Where DZLYTN falls. If there is a short LYTN we
> have 18 not 17.
> 2. Also, do we know 12 for BJNG? So it would be more
> or less if not exactly 12.
> 3. And how many more arcs for MXUS on the channelized
> Rio Grande?
> I am not yet counting ITVA since I think here we would
> be talking about features (not figures) which can not
> be perfectly geometrically true arcs.
true
& other reasons not to count any of the itva curves
are
that they are elliptical rather than circular
& that their total number is so highly debatable
amounting to either 1 or 3 or 5 or even more
depending on point of view
what a mess
& good idea to sidestep it
on any grounds
so
we have
by this exact count
at least 16 international border arcs
but still perhaps as many as 18
or more
if more are found
& they are evidently situated on 6 different borders & 1 tripoint
thanx
of course some wag will now come along to remind us that all
small & great circle arc borders
including every single segment between intervisible markers
are technically border arcs too
so we should add an extra zillion or 2
end insertions
> --- aletheiak <aletheiak@y...> wrote:
> > arif
> > i too believed in this arc report about easternmost
> > gmsn
> > & may even have been responsible for starting the
> > rumor about it
> > but i have been unable to substantiate it
> >
> > this border is set at a fixed distance from the
> > river on both sides
> > presumably from both its banks rather than from its
> > thalweg
> > just like the manh state line is offset from the
> > merrimack
> > except doubly so
> > as you probably also realized
> > & can see here
> >
> http://www.lib.utexas.edu/maps/africa/gambia_pol88.jpg
> >
> > however
> > as beguilingly arclike as all this may seem
> > such a regime would not actually presuppose any true
> > arcs at all
> >
> > except
> > i would agree
> > conceivably a single one centered at the headspring
> >
> >
> > however
> > the source of the gambia river is not in gambia
> > but in senegal
> > as you can also see in the above map
> > & therefore the simple offset regime couldnt project
> > such a
> > simple terminal arc sector
> >
> > only by varying the apparent regime & reducing it to
> > a single
> > offset center point in the middle of the river
> > could such a final true arc have been produced
> >
> >
> > also the map doesnt show any such terminal rounding
> > or bulge
> > as one would expect in such a case
> > but quite the contrary
> > something more like a foreshortening or truncation
> > of the basic regime
> > & indeed it makes the cutoff point look quite
> > arbitrary & artificial
> > & somehow distinctly at odds with the basic offset
> > regime
> >
> >
> > so at this point i think the existence of an arc on
> > gmsn hasnt
> > been & probably wont be demonstrated
> > & was just a wishful thought & misconception in the
> > first place
> >
> >
> > mind you
> > i dont actually know how the gmsn border does
> > accomplish this
> > remarkable turnabout at its east end if not in some
> > approximation of an arc or arcs
> >
> > & i can still imagine how it might somehow involve a
> > true arc or 2
> > based at some known terminal cross section of the
> > river
> >
> > but i dont believe there is any text that specifies
> > to this effect
> > nor any map that suggests it
> >
> >
> >
> > meanwhile
> > i have scoured the ghost frgb lines of the period
> > & have discovered nothing new
> > so our world class border arc census is again
> > stalled
> > at a top count of about 20 now & perhaps forever
> >
> > --- In BoundaryPoint@yahoogroups.com, Arif Samad
> > <fHoiberg@y...> wrote:
> > > Not sure, but isn't there some (at least one arc)
> > in
> > > the border of Senegal and Gambia. As far as I
> > > thought, the Easternmost point is directly east of
> > the
> > > Center of the arc in that border.
> > > Arif
> > >
> > >
> > >
> > >
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