The Arc/Info vector coverages are provided at two resolutions, corresponding to map scales of 1:100000 and 1:500000. For reference, PA county boundaries are also provided. DNER also provided an Arc/Info graphics file to be used for plotting the 1:500000 coverages and the county boundaries. Detailed information about this data set provided by DNER includes
The metadata have also been incorporated into the UNIX-based Arc/Info dataset and can be accessed using the DOCUMENT command in UNIX-based Arc/Info 7.0.4 once the dataset has been imported.The data are in a Lambert Azimuthal equal-area projection, with the following parameters:
Projection LAMBERT Units METERS Spheroid CLARKE1866 Parameters: 1st standard parallel 33 0 0.000 2nd standard parallel 45 0 0.000 central meridian -78 0 0.000 latitude of projection's origin 0 0 0.000 false easting (meters) 0.00000 false northing (meters) 0.00000