This directory contains outline data from 
ftp://ncardata.ucar.edu/datasets/ds780.0.  At the ftp site, the latitudes and
longitudes that make up the outlines are in the file named "data."  The files 
in this local directory contain the same information but in xdr (external data
representation) format.  XDR is a machine independent data format used by
rpc (remote procedure calls) that comes close to raw binaries for compactness
and efficiency.  See the man pages for xdr and rpc for more information.
The files are named after the datasets contained in file "data," as described
in the info/source file "MASTER," which was downloaded from the ftp site.  Here
is a description of the contents of each file:

GROUP1 - continental outlines
GROUP2 - high resolution U.S. state outlines
GROUP3 - continental outlines, international political boundaries, and high
	 resolution U.S. state outlines
GROUP4 - continental outlines and international political boundaries.

Each file consists of an xdr string record giving information about the file,
and then for each line an xdr integer record giving the number of points in
the line, followed by xdr float records for the latitudes and longitudes
that make up the line.  You can read the descriptor, which also contains the
format information, with the command "strings -10 fileName".

Read the file MASTER for source and crediting information.  The data set was
produced by the National Center for Atmospheric Research, which is operated
by the University Corporation for Atmospheric Research and is sponsored by the
National Science Foundation, from RIDLEY CHALMERS NCAR \SUPMAP PLOT PACKAGE.
Please credit all sources when publishing research which utilized data
from UCAR.
