Source:

From "Potential Yields of Wells in Unconsolidated Aquifers in Upstate New York" prepared by USGS in cooperation 
with NYS DEC at a scale of 1:250,000.

Arc: describe aquifers
               Description of SINGLE precision coverage aquifers

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
ARCS                                      392        32
POLYGONS                                  262        24               Yes
NODES                                     377

                               SECONDARY FEATURES

Tics                                      438
Arc Segments                            20984
Polygon Labels                            261

                                   TOLERANCES

Fuzzy   =                 1.219 V          Dangle  =                 0.000 N

                               COVERAGE BOUNDARY

Xmin =               474218.375            Xmax =               631188.438
Ymin =              4766747.000            Ymax =              4966188.500

                                     STATUS

The coverage has not been Edited since the last BUILD or CLEAN.

                          COORDINATE SYSTEM DESCRIPTION

Projection                  UTM
Zone                         18
Datum                     NAD83
Units                    METERS             Spheroid                GRS1980
Parameters: