Date   : Sun, 21 Nov 2010 20:52:17 +0000
From   : jgh@... (J.G.Harston)
Subject: Using a Beeb for engine monitoring

Rick Murray wrote:
> I'm not sure the route actually matters, you'd just need to know the
> distance travelled, and that you ought to be able to determine
> point-by-point from the GPS replies and some scary maths.

At one-minute intervals standard pythagoras would do it:
SQR((x2-x1)^2+(y2-y1)^2) At 60mph that's one mile a minute, I think
it's going to be difficult to find real-world roads that diverge
sufficiently from a straight-line approximation at that speed.
30seconds north at 60mph, 30seconds south at 60mph would be the
maximum error.

-- 
J.G.Harston - jgh@...