What I did on my 20 acres was to use two
300 foot tape measures to form triangles.
I started with a base line down the center
of the road (which runs within a degree of
N-S) and then triangulated to a 300 foot
line that was 200 feet inside my property.
>From this line, other lines can be formed
by further triangulation establishing a
grid of known points every 200 feet. Any
subsequent point can then be plotted out
by triangulation from the nearest 200 foot
grid points. No angle measurement is involved
at all in this paradigm. Checks by doing
redundant triangulation checks indicated that
the accuracy was within a foot or two. The
main source of error is tape measure tension.
You can try to use constant tension but that
only works if there is no wind.
Rick Karlquist N6RK
> -----Original Message-----
> From: owner-towertalk@contesting.com
> [mailto:owner-towertalk@contesting.com]On Behalf Of Tom Rauch
> Sent: Sunday, November 18, 2001 10:48 AM
> To: TowerTalk
> Subject: [TowerTalk] Laying out antennas
>
> > Are there any reasonably priced devices for laying out wire
> antennas or tower and guy lines, so the direction heading is
> accurate? What I'm interested in is something that uses magnetic
> north or maybe even GPS to get precise direction references, like a
> surveyor might use.
>
> Any idea what they are called, what they cost, and where they are
> sold?
> 73, Tom W8JI
> W8JI@contesting.com
>
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