Terrain in Florida is suprisingly varied, but it's a matter of scale.
Compare the rolling horse farms in the Ocala area with the Everglades or
the Kissimmee River headwaters. I generally deal with five foot
contours; anything less than that is inconsequential for my purposes.
In addition to siting factors, I also need to take into account HAAT
(height above average terrain for RF purposes). Small variations also
are significant in the context of flood control down here.
Michael is right though...we certainly did "climb" Mount Okeechobee!
Bill
bjbutler@... wrote:
> 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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