Jeff Liebermann wrote:
On Sun, 4 Mar 2012 20:10:17 -0000, wrote:

My objective was to determine my full Maidenhead before there were web
applications to find it.

Some GPS receivers will deliver the Maidenhead grid square directly.
http://www.n7cfo.com/vhf/gps/~gps.htm

I just took my portable, WAAS enabled, aviation GPS to the back yard and
let it average for a couple of minutes.

Since then I discovered why I kept getting different results pre-GPS (long
boring story about map accuracies); turns out the dividing line runs
down the sidewalk across the street.

Chuckle.

We're close to that problem at the local club station (K6BJ):
http://802.11junk.com/jeffl/pics/drivel/slides/grid-cm8x.html
I had to post this map because operators were constantly calculating
the wrong grid square.

Nearby, is the local intersection of the lat-long lines.
http://confluence.org
http://confluence.org/confluence.php?lat=37&lon=-122
Notice the wide variations in photos by people thinking they've found
the correct location. The problem is that the real intersection is
located on a poison oak infested steep hillside. We posted a DGPS
located marker, but people keep stealing it.


As it turns out, my house is in the very SW corner of DM14fco7, with the
front in DM14fco7ae and the back in DM14fco7be.

mandatory antenna content

If you go to http://no.nonsense.ee/qthmap/ and enter DM14fco7be the
white dot in the middle of the back yard is the box covering an SGC
autotuner for the 33 foot vertical.