Files in this directory contain a variety of geographic resources taken from the
U.S. Geological Survey's Geographic Names Information System (GNIS)

       FILE NAME       SIZE         DATE     DESCRIPTION

   ZIPTract.zip       4,101,021    01-24-11  U.S. Department of Housing and Urban
                                             Development file containing United States
                                             Postal Service links between ZIP codes and
                                             census tracts.  Revised quarterly.

      ZIPCBSA.zip       471,768    01-24-11  U.S. Department of Housing and Urban
                                             Development file containing United States
                                             Postal Service links between ZIP codes and
                                             Core Based Statistical Areas.  Revised quarterly.

    ZIPCounty.zip       923,010    01-20-11  U.S. Department of Housing and Urban
                                             Development file containing United States
                                             Postal Service links between ZIP codes and
                                             counties.  Revised quarterly.

    ZIPCounty.pdf        20,856    01-20-11  Description of the contents of ZIPCounty file.

   CITYCNTY08.zip     2,369,309    04-02-10  Cities associated with counties, by state
                                             extracted from Census Bureau's Subcounty
                                             Population Estimates program

     GNIS0306.PDF        53,980    03-10-06  Description of contents and the
                                             record layout for the files
                                             included in GNISFP and GNISAC.

       GNISFP.ZIP    60,538,990    03-10-06  FoxPro database containing over
                                             1.9 million geocoded map features
                                             from the U.S. Geological Survey's
                                             Geographic Names Information System
                                             (GNIS).  Contains both natural and
                                             manmade features.

       GNISAC.ZIP    79,970,553    03-10-06  MS Access database containing over
                                             1.9 million geocoded map features
                                             from the U.S. Geological Survey's
                                             Geographic Names Information System
                                             (GNIS).  Contains both natural and
                                             manmade features.

      GEOGNEW.ZIP        81,877    06-11-03  FoxPro and delimited text files containing
                                             new definitions of metropolitan and
                                             micropolitan statistical areas released
                                             by the Office of Management and Budget
                                             on 6-10-03.  See GEOGFILE.TXT for record
                                             layouts and information about the 
                                             contents.

Questions should be addressed to the National Crosswalk Service Center at NCSC@iowa.gov