Yes, and it would work if gps were accurate enough over short distances.
However, even for laying out an 80m 4-square its no where near accurate
enough. Its much easier to use a tape measure and compass. But you can do
it if you want, just a little algebra reverses the formulas for bearing and
range to give you the lat/lon. For very short distances they can probably
be simplified even more using a couple small angle approximations... but any
gps worth it's salt will let you mark a waypoint and then display distance
and bearing to it as you walk around. So just mark the center point then
use that feature to find the corners.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: cq-contest-bounces@contesting.com [mailto:cq-contest-
> bounces@contesting.com] On Behalf Of Dave/KA1NCN
> Sent: Wednesday, July 02, 2008 21:07
> To: cq-contest@contesting.com
> Subject: [CQ-Contest] Using GPSs and Google to place antennas
>
> Like most people, I use Google Maps to look down upon the earth. Indeed,
> I have had occasion to covet many of your antennas using this wonderful
> service. Some day, I hope to have a antennas like those that I see from
> above.
>
> Finding the precise place to put a set of antennas is not an easy task.
> For instance, an array such as a four square must be precisely positioned.
> Since we all have access to Google Maps, which will tell us the
> coordinates of any place on earth, and we all have GPS, which will tell us
> where we are, it dawned on me that we could probably use GPS as a means to
> position antennas when planning a permanent or expedition station. (I
> realize that there are some errors in GPS, but let's set these aside.)
>
> The problem is, I can't figure out the equations to take one set of
> coordinates, and add a distance and bearing to them. There are lots of
> online calculators that tell you the distance and bearing between two
> coordinates, but none that I can return a new set of coordinates given a
> distance and bearing.
>
> Has anyone thought of this, or am I missing something?
>
> 73
> Dave/KA1NCN
>
> dave@KA1N.CN
>
>
>
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