ahh but heres something better we can still do for true bcidwa
without waiting for bulletin 466
since we realize the point we are seeking lies by definition at the
precise intersection of the caus monument sight line & the
meridian of the idwa terminal marker
to within millimetric accuracy
can you say
where in relation to the caus clearcut the 1909 usgs idwa disk
marker falls
& why that vicinity wasnt visible from caus monument 195 as the
topo indicates it should be
for if the 1909 marker falls at or even anywhere near dead center
of the clearcut
then you are already certainly revalidated in class d
since you couldnt have failed to observe that you were in the
general location of true bcidwa in that case
whether you had realized it very exactly at that time or not
& you are probably also revalidated back to class c & b as well
since you say you were expecting it within an inch of the sight
line & you were evidently simultaneously aware of both the sight
line & the terminal meridian of idwa
so depending on what you actually saw
by objective empirical data you must have been looking at as
well as being in at least the right square meter anyway
right
& perhaps the right square decimeter
& thats all we are really looking for in your pix &or recollections
looking for what you saw thru your actual eyes
since that might well be enough for a class b in this case
& bulletin 466 will only be gilding on your lily
but do tell or show us more
--- In
BoundaryPoint@yahoogroups.com, "aletheiak"
<aletheiak@y...> wrote:
> dave i also just realized your best guessed position for true
> bcidwa
> of about half an inch north of disk center
> if i have understood everything right
> is still based only on hearsay
>
> granted it is the testimony of a local & an expert
>
> but i dont think we have actually confirmed even class c yet
> by any objective criteria
>
> the disk could be substantially farther off line in either direction
> than either of us has previously supposed
>
> so until we tie the monument positions together
> we cant even presume class d
>
> you may not yet have actually seen true bcidwa
> since you may not yet actually know where it is
>
> you have at least a very earnest class e tho
>
> that can never be doubted
>
> --- In BoundaryPoint@yahoogroups.com, "aletheiak"
> <aletheiak@y...> wrote:
> > ok
> > i was imagining you actually had a sight line
> > or else actually performed great circle distance computations
> > based on the published or empirically determined
geocoords
> for
> > all 3 markers
> > on which to base your estimated half inch offset
> > & to claim a correspondingly measured class b visit
> >
> > so evidently it was not quite so punctilious as i had thought
> >
> > but still
> > you are certainly looking at no less than a very close class c
> visit
> >
> >
> > also it may be worth noting that if the 1909 idwa marker really
> > was set exactly on the 49th parallel as i believe your
informant
> > reported
> > however improbably so
> > given the state of survey art as of that date
> > it would not have fallen south of caus
> > as he apparently also concluded
> > but north of it
> > by both the nad27 & the nad83 ibs coords
> > yikes
> >
> > & that would mean the disk center isnt in the usa at all but in
> > canada
> > yikes
> > & that true bcidwa isnt half an inch north but some unknown
> > distance south of the disk center
> >
> > which direction is frankly hard to believe
> > tho thats what the data as presented are adding up to saying
> >
> > so happily we still have somewhere to go in fine tuning this
> one
> >
> > usgs bulletin 466 for starters
> > since the bible promises it somehow ties the markers
together
> >
> > --- In BoundaryPoint@yahoogroups.com, "Dave Patton
[DCP]"
> > <dpatton@c...> wrote:
> > > At 02:32 PM 2004/07/21, aletheiak wrote:
> > > >were you actually able to sight along the caus line from
> > marker
> > > >195 to marker 194 across the face of the 1909 idwa
> terminal
> > marker
> > >
> > > No - that's impossible given the terrain in the area.
> > >
> > > >or exactly how did your discovery of this eccentric point
> > location
> > > >take place
> > >
> > > Information from a conversation with a surveyor who, in
part,
> > > is using information from the old USGS bulletin. It was a
brief
> > > conversation, and I don't have the bulletin, and the surveyor
> > > was going from memory, so don't rely on any specifics.
> > >
> > > As I said, it raised in my mind the theoretical possibility,
> > > but now I think it's not a valid concern, because the state
> > > boundaries are terminated at an 'imaginary' point where
the
> > > line meets the Canada/USA border, regardless of where
the
> > > monument is located.
> > >
> > >
> > >
> > > --
> > > Dave Patton
> > > Canadian Coordinator, Degree Confluence Project
> > > http://www.confluence.org/
> > > My website: http://members.shaw.ca/davepatton/