I'm confused about this.

the gps data constantly streams in
so, when you say 'take all' what does that mean?

I'm not quite sure what a moving average is, formula wise, but is this what
you need to do?  calculate a moving average?


thanks

----- Original Message -----
From: "Picdude" <picdude@NARWANI.ORG>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, April 24, 2003 10:13 PM
Subject: Re: [ot]: calculating average GPS position


Not specifically w.r.t. GPS, but from a mathematical perspective...

If you're suggesting averaging by averaging points A & B, then the result of
that with C, then with D, etc, that would be an incorrect definition of the
term "average".  Avg(A,B,C) != Avg(A,Avg(B+C)).  For example, the average of
7,8,9 = 8.  Avg(Avg(7,8) , 9) = Avg(7.5,9) = 8.25.  Bzzzt!

So take all lats and avg those, take all lons and avg those, and that should
be the result.

Or maybe there's something specific to GPS that makes this all just a load
of
cr*p?

Cheers,
-Neil.


On Thursday 24 April 2003 21:49, rad0 wrote:
> how exactly would I calculate an average of a fixed gps reciever
> to eventually get a more accurate lat/lon ??
>
> if you take two lat/lon's average, then do this with the very next
> available lat/lon
> is this any good?
>
> or if you take 10 lat/lon's get average then average this with the next
ten
>
>
> what's the best way to do this?
>
>
> thanks

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