& more likely
& especially in recent centuries
any dimple or crosshairs etc was already scribed at the exact center
of the monument or disc by the manufacturer
so the surveyor wouldnt have to do this for himself
--- In
BoundaryPoint@yahoogroups.com, "Lowell G. McManus"
<mcmanus71496@m...> wrote:
> Michael Kaufman asked:
>
> > ...My question is
> > this: Is the exact tripoint
> > 1. the middle of the marker?
> > 2. the county placed disc?
> > 3. the dimple?
> > And HOW would we know? I would assume there can't be
> > too much official paperwork on 4th-level boundaries.
> > But maybe some general set of guidelines somewhere?
>
> The dimple! It was likely put there by the surveyor using a hammer
and die to
> mark the exact point on the disc where the point of the plumb bob
hanging from
> his transit came to rest. Any subsequent surveyor who measures
from the
> monument will center his transit's plumb bob over the same dimple.
>
> Lowell G. McManus
> Leesville, Louisiana, USA