[time-nuts] Averaging Location for Position Hold

Peter Vince pvince at theiet.org
Wed Sep 14 15:47:22 UTC 2011

> I hear that there is a hobby where people photograph these and collect
> the photos.  Seems pointless in the city but many are on mountain
> peaks and other places with good views.  The hobby is more reasonable
> if you find them without using GPS.  The USGS maps are good enough o
> put you within 10 to 20 feet of the BM without using a GPS.
> Chris Albertson
> Redondo Beach, California

In the UK there is a website: <http://www.trigpointinguk.com/> that
encourages this hobby.  A "trig-point" being short for Triangulation
Pillar which are reference points set up by the Ordnance Survey.


More information about the time-nuts mailing list