I
don't blame you. They are confusing. A crossclave is a portion of
one entity, in this case part of a County
connected to the main body of the County only at a
point. See sttachment Schley-Schley-Taylor-Taylor, GA.
Notice
the quarter section of Taylor enclaved in Schley and just touching the main part
of Taylor at the quad
point.
A
peneclave is where there is still a connection between the two parts with a
narrow opening. On the old
NAD27
maps the one in GA looked like #1 Dodge-Telfair-Telfair- Wheeler (see
attachment). I didn't save that
in a
file but I printed it. It shows the protrusion (peneclave) of Telfair county
into Dodge County. It isn't a quad
point
at all, just an interesting bvoundary curiosity. On image #1 I drew in the
Telfair-Wheeler boundary the way it showed on the old map with the red
+ being the corner. It is less than 1000 ft from this corner to the rt angle
corner just to the SW. Now look at the same map as currently available on
NAD83 (#2attachment).
Notice
the faint arc boundary marked indefinite separating Telfair and Wheeler
Counties up to the red + much farther to the NE. The gap is now about 1/2
mile which may make calling it a peneclave much less
convincing.
I
didn't discover this change until you asked about it in your message
below.
For a
better example of a peneclave check the VT map and look for Windsor
County. The projection in the
upper
left corner into Addison County is a good example of a peneclave. If you
want to look at this on Topozone the peneclave is about centered at 43deg
51' 39"N, 72deg 55' 33"W. Again there is no quad point,
just
tri-points. You will need to go to 1:250000 to see the whole
peneclave.
I hope
this helps you.
Jack
Jack: I
confess to not knowing the definitions of crossclave
and
peneclave.
Mike
--- In BoundaryPoint@yahoogroups.com,
"jparsell" <jparsell@n...> wrote:
> Mike, if you crank Topozone up
to 1:10000, it shows even better. It
still
> comes out to about 50
feet so it is on
> my list as a near miss. For Georgia I have six
internal quads, two
> interstate quads, plus a crossclave and a
>
peneclave. As Mike Donner points out we still don't know if the
lines on
the
> maps are drawn absolutely
> accurately. I guess one only way
to find out for sure would be to
check the
> local county
records. Since this
> one is in the river there won't be any
markers to look for.
> Glad to know that you are interested in
these.
>
> Jack
> -----Original
Message-----
> From: spookymike@a...
[mailto:spookymike@a...]
> Sent: Thursday, December 04, 2003
6:32 PM
> To:
boundarypoint@yahoogroups.com
> Subject: [BoundaryPoint]
Short County Borders
>
>
> Check out the link,
which shows the near-junction of Candler, Emanuel,
>
Tattnall, and Toombs Counties in Georgia. It appears that the
>
Emanuel/Toombs line
> and the Candler/Tattnall line hit the
Ohoopee River about fifty feet
> apart,
> which means
that Emanuel and Tattnall Counties share a fifty foot long
>
border.
> If you crank Topozone up to 1:25,000 scale, the
border shows up
better.
> The
> Emanuel/Toombs line
is shown as "indefinite" to complicate the
situation.
>
> URL:
>
>
http://topozone.com/map.asp?z=17&n=3576224.0517763%20&e=383942.605880765&u=1
>
> For Jack Parsell: What's your assessment of this
quasi (or possibly
> actual)
> four-way
junction?
>
> Mike Schwartz
>
> Yahoo! Groups
Sponsor
>
ADVERTISEMENT
>
>
>
>
> Your use
of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by
AVG anti-virus system (http://www.grisoft.com).
> Version:
6.0.541 / Virus Database: 335 - Release Date: 11/14/03
Your
use of Yahoo! Groups is subject to the Yahoo! Terms of Service.