Cub Driver wrote:
On Tue, 9 Nov 2004 06:54:49 -0500, "Morgans"
wrote:


In the deeds I read, surveyers measured by chains and rods. I think
they also used perches, but I have never seen a reference to one.

all the best -- Dan Ford


The ones I have seen lately use mainly lasers and detectors. I think GPS is
used in some manner, also.


I meant that the survey literally recorded measurements as "three
chains, two rods from the oak tree to the other oak tree".

(I particularly like "the other oak"

One chain = 66 feet.

One rod = 16.5 feet

Just how does modern surveying equipment work? One guy holds one of
those mirrors (actually a prism) that reflects light back to the source,
independent of the angle of the mirror. The instrument head contains a
laser. Distances must be measured by angles, but how?