Ah, yes. I see you rely on the most recent USGS maps.
BJB
--- In BoundaryPoint@y..., michael donner <m@d...> wrote:
> hey
> we climbed lake okeechobee
> didnt we
>
> http://home.wanadoo.nl/~eefberns/gp-frsp400-achterkant.jpg
> was the actual background as i recall
> isnt that right bill
>
> m
>
>
> >
> >Since you are in Florida, I have to ask - what terrain?
> >
> >BJB
> >--- In BoundaryPoint@y..., Bill Hanrahan <hanrahan@k...> wrote:
> >> Good to hear...in most cases (depending on terrain) resolution to
> >the
> >> nearest second generally suffices for me anyway.
> >>
> >> Bill
> >>
> >> bjbutler@b... wrote:
> >>
> >> > See message 2444, but basically I think you will be OK if you
use
> >> > only the geocoordinates and not the UTM coordinates displayed
by
> >> > topozone.
> >> >
> >> > BJB
> >> >
> >> > --- In BoundaryPoint@y..., Bill Hanrahan <hanrahan@k...> wrote:
> >> > > Thanks Bryan. It will be interesting to see what their
response
> >> > will
> >> > > be. I've also been relying on Topozone on the job...
> >> > >
> >> > > Bill
> >> > >
> >> > > bjbutler@b... wrote:
> >> > >
> >> > > > Anyone using www.topozone.com to acquire GPS coordinates
> >should be
> >> >
> >> > > > aware that they are using a mixture of NAD27 and NAD83 UTM
> >> > > > coordinates, but there is no way to tell which is which.
They
> >> > > > believe all coordinates are NAD27. However, last week I
> >relied on
> >> >
> >> > > > this misinformation during a bushwhack from the Delaware
Arc
> >> > monument
> >> > > > to the Delaware - Maryland - Pennsylvania tri-point and
ended
> >up
> >> > in a
> >> > > > hay field 200 meters north of the tri-state monument.
Using
> >the
> >> > same
> >> > > > target coordinates, but interpreting them using the NAD83
> >datum
> >> > > > yields the correct result.
> >> > > >
> >> > > > I have contacted topozone about this problem.
> >> > > >
> >> > > > Regards,
> >> > > > BJB
> >> > > >
> >> > > >
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