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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