Barry King wrote:
>
> Sorry about the double post.  Itchy trigger finger :)
>
> Adam,
>
> Let's go back to original problem.  We want to map a trail.  Let's
> assume that we've got a 7.5 minute topo map.  On CD, if that helps.
>
> Can I do inertial navigation, by integrating the output of a bike
> speedo and the output of a digital compass using the PIC as a data
> logger, and post processing?  How about a special pickup using the
> bike wheel as a distance measurement wheel, and the compass?
>

Certainly for enough money you can get a dead reconning system
to attach to a GPS receiver, and they do improve accuracy.
I don't know aobut vibration. A mountain bike is not a stable
platform.

> How about Loran, which is not intentionally crippled?

Don't think it's as accurate as GPS. Loran was intended as
a long range navigation system.

Have you verified that you actually do have an accuracy problem with
simple USCG corrected GPS?

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