[RFI] Compass Vectors

Roger (K8RI) k8ri at rogerhalstead.com
Tue Dec 1 20:01:28 EST 2015

To complicate things, the guy who built this house used the "that looks 
about right" method resulting in the N end of the house being 10 feet 
farther from the road than the S end.  Of course the compass declination 
is off about -6 deg in the other direction, making my true North seeking 
Owl about 30 degrees off.  The discrepancy is quite visible on Google Earth.

OTOH when I started flying  the declination was +5 deg (give or take)
In the upper peninsula the declination can change 30 deg or more in just 
a few miles.


Roger  (K8RI)

On 12/1/2015 12:01 PM, Jim Brown wrote:
> There is also 5-10 degrees worth of "slop" in the photography 
> displayed by Google Earth. I discovered this when trying to use the 
> Ruler function in alignment with the walls of my house. :)
> 73, Jim K9YC
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