RE: dash7 pictures

> What I've found with just accelerometers is that the
> straights get elongated
> first, then the corners become more wayward and the plot
> spirals out.  The
> speed input will get the longitudinal plot accurate again but
> it won't cure
> the cornering problem.
>
>


Could you use a Magneto-Inductive sensor (aka electronic compass) to derive
direction of travel. If you know what direction you're travelling, and the
speed, it should be possible to get an accurate track map. I've seen digital
electronic compasses for as little as 30 quid; this includes a case, microchip
and digital display, so the sensor itself must be quite cheap.

Just a thought

Paul
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