Ok, and with GM-SN - is this also monumented, or is it
threoretically a point-by-point offset? I find no IBS
study for this boundary. How far is the offset on
each side?
How about the offset for MA-NH? Is there historical
info for this (plus distance?)
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). 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. 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@...> 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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