--- In
BoundaryPoint@yahoogroups.com, Michael Kaufman
<mikekaufman79@y...> wrote:
> Ok, and with GM-SN - is this also monumented, or is it
> threoretically a point-by-point offset?
i seem to recall brownlie indicating it was monumented
I find no IBS
> study for this boundary. How far is the offset on
> each side?
10 kilometers
> How about the offset for MA-NH?
3 miles
Is there historical
> info for this (plus distance?)
what do you mean
i could drag out the bus&ss & give you the exact dates of the
delineation & of the demarcation
> My oops was just for mistaking the border of Salisbury
> Beach State Reservation with the outer boundary of the
> town. Regarding MA-NH, I do see it petering out and
> stopping but then just blackness - I can't see the red
> line (for the 3 nm limit).
you need the 100k scale map for that
And if indeed the town
> boundaries stop at the low tide line, then also note
> that there is another error on the map, for they have
> extended the Salisbury-Newburyport town line all the
> way into the ocean, as far out as they have extended
> MA-NH.
not necessarily an error
tho sometimes the mapmakers really dont know when to stop
but why are you so curious about everything
is there a point in all this
or just a great thirst for knowledge of any kind
end of insertions
This line is here:
> http://www.topozone.com/map.asp?
z=19&n=4742171&e=352160&s=50&size=m&datum=nad83&layer=DRG25
> You can follow it all the way out east. So it looks
> like one line too short, one too long. Now to find
> one just right...
>
> --- aletheiak <aletheiak@y...> wrote:
> > dont know how much of your observation & query
> > string the ensuing
> > oops was meant to obviate
> > but maybe the following inserts will still
> > illuminate or levitate
> >
> > --- In BoundaryPoint@yahoogroups.com, Michael
> > Kaufman
> > <mikekaufman79@y...> wrote:
> > > MANH state line - while the border approximately
> > > follows the Merrimack at some general distance
> > offset
> > > ( http://ma.water.usgs.gov/basins/merrimack.htm
> > > ), it is monumented and the border is the
> > standard
> > > series of straight lines as depicted on Topozone (
> > > http://www.topozone.com/map.asp?
> >
> z=19&n=4747939.00011567&e=351357.999989004&datum=nad83
> > > and westward).
> >
> > correct
> > & i didnt mean to imply it hasnt also been set by
> > standard markers
> > but only meant that the original delineation was a
> > river bank offset
> > line
> >
> > > And in that Topozone map - is that a
> > > Salisbury-Seabrook-Massachusetts tripoint?
> >
> > i dont think so in any case
> >
> > the manh state line shown on the 100k scale topo
> > petering out
> > somewhat shy of the 3mile limit is just incomplete
> >
> > it should be extended mentally all the way out to
> > the red line
> > & doesnt reflect town limits anyway
> >
> > & tho there are exceptions
> > i believe municipal territories generally end &
> > state territories
> > generally begin at the low tide line
> > unless otherwise indicated
> >
> > like salisbury beach state park is otherwise
> > indicated
> >
> > NH towns
> > > have more ocean territorry than MA towns?
> >
> > with the above unusual exception
> > apparently usually not
> > but of course i dont really know every other
> > exception either
> >
> > And is it
> > > up to the three Nautical mile limit?
> >
> > generally state territories only extend up to this
> > limit
> >
> > >
> > > --- 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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