Subject: Re: [BoundaryPoint] Re: dcmdvan & mdvawv retries continued
Date: Sep 24, 2004 @ 14:16
Author: Lowell G. McManus ("Lowell G. McManus" <mcmanus71496@...>)
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----- Original Message -----
From: "aletheiak" <aletheiak@...>
To: <BoundaryPoint@yahoogroups.com>
Sent: Friday, September 24, 2004 1:04 AM
Subject: [BoundaryPoint] Re: dcmdvan & mdvawv retries continued
> --- 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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