[at-l] re: Pittsburg(h)

[jbullar1 at twcny.rr.com (Jim Bullard)]

At 07:23 PM 10/19/2005 -0400, Walt Daniels wrote:
>Wheeling mileages and GPS mileages measure different things. In steep and
>rocky/twisty terrain, GPS is frequently 10-20% lower than wheel mileages.
>
> > -----Original Message-----
> > From: at-l-bounces@backcountry.net
> > [mailto:at-l-bounces@backcountry.net] On Behalf Of Nightwalker
> > Sent: Wednesday, October 19, 2005 6:47 PM
> > To: at-l@mailman.backcountry.net; W F Thorneloe
> > Subject: Re: [at-l] re: Pittsburg(h)
> >
> > W F Thorneloe <thornel@attglobal.net> wrote:
> > > Pittsburg is involved in wheeling the trail in NOGA, trying to get
> > > accurate mileages due to his concern about the woefully inadequate
> > > Databook. (That'll start something!)
> > >
> > > Didn't DelDoc do this by GPS before his death last year?
> > >
> > > OrangeBug
> > >
> > Yes, but even though the data has been promised to appear
> > online, over and over, it hasn't yet.

GPS calculates mileage as a straight line between the points checked as in:

Point 1 __________________________________________ Point 2

But we all know the actual footpath is more like:

Point 1 _/\-_/\__/U\~~/>-<\__/\-_/\__/U\~~/>-<\__- Point 2