Column Name         Type                Column Definition 
OBJECTID            int                 Unique identifier for the record
Shape               varchar(20)         Type of shape: point, line, polygon, multipoint, or multipatch
StateFIPS           varchar(2)          Census state FIPS code
CountyFIPS          varchar(3)          Census county FIPS code
ZipCode             varchar(5)          Five-digit postal code used by the United States Postal Service
LandArea            decimal(15,7)       Land area in square meters
WaterArea           decimal(15,7)       Water area in square meters
Latitude            decimal(18,7)       Latitude coordinate of the centroid point inside of zipcode
Longitude           decimal(18,7)       Longitude coordinate of the centroid point inside of zipcode
Area                decimal(20,9)       Area of the zipcode in square meters
Perimeter           decimal(20,11)      Perimeter of the zipcode in meters
ShapeWKT            varchar(35000000)   Well-Known Text field
ShapeWKTLength      int                 Well-Known Text field length
Shape_Length        decimal(20,18)      *Length (perimeter) of shape 
Shape_Area          decimal(20,18)      *Area of shape 

* Measurements are in decimal degrees, driven by the original coordinate system.  Not reliable for use.