My new GPS

To:	"" <>,
Subject:	My new GPS
From:	"Billinghurst, David (CRTS)" <>
Date:	Mon, 17 Jul 2000 02:39:55 -0000

True North is the direction of the North Pole.

Magnetic North is the direction of the North Magnetic Pole, which is not the
same thing, and is what a compass points to.  Magnetic North is about 10  to
11 degrees East to true north in Victoria.  Ths difference, called the
magnetic variation, depends on location and changes slowly with time.  It is
given on most topographic maps.

Grid North is the direction of the vertical grid lines on your map.  This is
different again, and is caused by the transformation from a spheroid, the
earth, to a plane, your map.  In many cases this can be ignored.
 



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