--- In
BoundaryPoint@yahoogroups.com, "Lowell G. McManus"
<mcmanus71496@m...> wrote:
> I'd love to be there, but I can't get away.
>
> I think it's good to carry forward any and all notions of how to
extend VAWV to
> the tripoint. Sometimes, there's nothing like a personal on-site
look to make
> the best solution obvious.
>
> Are you aware that the 1997 survey is recorded in the
courthouse land books of
> both Loudoun and Jefferson counties?
thanx
& yes i am aware that a copy of the survey presently in my hands
has also been deposited in both those places
but i find it hard to conceive how further extrapolations could have
been made & registered there that are not in the survey
as it is
the unmarked terminal point of the survey depicted at the edge of
the river is already an extrapolation from the last 2 monumented
points
still it might be a good idea to poke around these courthouses
in the absence of anything better
my mathematical tries at zeroing in on the 4 potential target
areas are proving incredibly complicated too
time for a breather perhaps
It just might say that the last bearing
> continues on to the Maryland boundary. If so, your surveyor's
marker at the
> river's edge might not be intended as terminal, just the only
practical place to
> put it. Of course, you probably covered all of this in your
confabs with the
> surveyor.
>
> Lowell G. McManus
> Leesville, Louisiana, USA
>
>
> ----- Original Message -----
> From: "aletheia kallos" <aletheiak@y...>
> To: <BoundaryPoint@yahoogroups.com>
> Sent: Thursday, September 23, 2004 2:49 PM
> Subject: [BoundaryPoint] dcmdvan & mdvawv retries continued
>
>
> >
> > so
> > to sum up & then proceed
> >
> > the best available & indeed authoritative positions
> > if not of these 2 tripoints themselves
> > then at least of the low water marks convergent upon
> > them
> > is as presented by usgs mapping
> >
> >
>
http://www.topozone.com/map.asp?z=18&n=4311741.00001324
&e=316164.999969563&datum=nad83
> >
> >
> >
>
http://www.topozone.com/map.asp?z=18&n=4355975&e=26557
4&s=50&size=l&datum=nad83&layer=DRG25
> >
> > so the geocoords need to be carefully lifted from the
> > paper copies of these topos
> > & then used as the primary gps targets
> > for the monument based alignments to then pan across &
> > home in on
> >
> > & we need to hope mike schwartz has a gps receiver
> >
> > or that someone who does also attends
> >
> > or can you confirm that right off mike
> >
> >
> > also
> > special to brian
> > can you confirm that the superfine coords you give for
> > these points at the corner corner
> > namely
> > dcmdvan
> > nlat 38d56m03s2 x wlong 77d07m12s6 nad27
> > &
> > mdvawv
> > nlat 39d19m16s1 x wlong 77d43m09s4 nad27
> > are the same ones you pulled from the paper topos
> > & that your tenths of seconds are as significant as
> > they appear to be
> >
> > as i recall
> > you took special care with all these at the time
> >
> > & i am inclined to base the tries directly upon them
> > since i already believe they are as right as can be
> > rather than bothering to check or redo your work
> >
> > but i would appreciate any confirmation
> >
> >
> >
> > & to continue
> >
> > the dcmdvan alignment will be straightforward &
> > attainable within centimeters if we find the marker
> >
> > as i still believe we will
> >
> > & nothing more needs to be said about it til we try it
> >
> >
> > but the mdvawv alignment is still unknown
> > & perhaps unknowable
> >
> > & we also dont know what authority we could possibly
> > consult that would be better than ourselves & our own
> > best judgments about it
> >
> > so far we have 4 choices for the bearing of the
> > tripointing stitch from the extant vawv terminus
> > each of which will produce a different line
> > all of them presumably of slightly different lengths
> > & each leading to a different putative tripoint
> > position
> >
> > but we should probably carry all of these forward
> > & be open to possible others as well
> >
> >
> > the bearing of the extant legal vawv terminal segment
> > is ne36d40m22s
> > & i believe it continues to be the leading candidate
> >
> > the bearing of a line running perpendicular to the
> > bank appears to be roughly ne10 degrees
> >
> > the bearing of a line running perpendicular to the
> > river center line appears to be roughly due north
> >
> > the bearing of a line running directly toward the
> > visible ridge continuation above the maryland bank
> > appears to be roughly nw10 degrees
> >
> >
> > & there are still a few more numbers i should be able
> > to crunch
> > so as to tie the topo based coords in with the survey
> > based coords
> >
> > & that should be revealing but will take a while
> >
> > so please stand by
> > &or chime in with anything else
> >
> >
> > of course all four stitch candidates will ultimately
> > head off into the white water in different directions
> >
> > but we could follow them at least to the edge of the
> > water & then project them mentally from there
> >
> > for the time being at least
> >
> >
> > both tries are still looking real for columbus week
> > give or take a few days
> >
> > any further additions corrections comments help
> > attendance etc etc would of course be appreciated
> >
> >
> >
> >
> >
> >
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