The maps from the MXUS Treaty of 1970 showing four arcs are at a scale of
1:20,000 on three long sheets, each about one foot by three feet. They are
black-and-white aerial photos with the boundaries through both the old channels
(shown by lines between numbered traverse points) and the projected relocated
channels plotted onto them.

I can scan pertinent portions of these maps for you on request. Meanwhile, here
are links to view the arcs on USGS topo maps showing the arcs in the relocated
channels.

There are three arcs in the Presidio/Ojinaga area:
Curve No. 1: http://tinyurl.com/6msfp
Curve No. 2: http://tinyurl.com/6u56h
Curve No. 3: http://tinyurl.com/6qgrl

The fourth is above Hidalgo/Reynosa: http://tinyurl.com/5ppgp

Lowell G. McManus
Leesville, Louisiana, USA

----- Original Message -----
From: "Michael Kaufman" <mikekaufman79@...>
To: <BoundaryPoint@yahoogroups.com>
Sent: Tuesday, July 13, 2004 12:30 AM
Subject: Re: [BoundaryPoint] world class border arc census was Re: real bjneng
try afoot

> Is the map for the four acrs in digital format? It
> would be nice to see these to compare them to the map
> for the five El Paso/Ciudad Juárez arcs which you have
> linked below.
> I can't see them using "C" for anything other than
> circumference, but of course that would be kind of
> redundant to put that in there considering they have
> provided the radius. So no idea otherwise.