DATABASE NAME

     CD103: 103rd Congressional Districts

DATABASE DESCRIPTION

     103rd Congressional districts with congress members from the
     103rd Congress based on 1:100,000 TIGER/Line records.

ORIGINATING AGENCY

     Federal Railroad Administration

AGENCY RESPONSIBLE FOR MAINTAINING DATA

     Bureau of Transportation Statistics

CONTACT

     National Transportation Atlas Databases
     Bureau of Transportation Statistics
     U.S. Department of Transportation
     Washington, DC  20590
     (202) 366-DATA
     Internet:  info@bts.gov

SOURCE

     1:100,000 Census TIGER/Line records supplemented by editing
     performed by the Federal Railroad Administration

ACCURACY

     80 m (260 ft) root-mean square positional accuracy

TYPE OF GIS DATABASE

     Area database with polygons and links

FILES/SIZE/NUMBER OF RECORDS

     Two ASCII files

     1)   cd103.ply      polygon file contains area attributes
     2)   cd103.lin      link file contains link attributes and
                         shapes for links

     Approximate size of files:    5,997,000 bytes
     Approximate number of areas:  440
     Approximate number of links:  2300

FILE STRUCTURE

     The files are ASCII-comma delimited.  Character fields are
     enclosed in quotation marks.

     The Polygon File

   FIELD  ITEM                TYPE      REMARKS

     1    ID                  Num       Unique Identification
                                        number
     2    Area                Float     Area of district (sq mi)
     3    Name                Char      District number including
                                        state FIPS number
     4    State               Char      Complete state name
     5    District            Char      District number only
     6    Representative      Char      Name of Representative
                                        from 103rd Congress

     The Link File

   FIELD  ITEM                TYPE      REMARKS

     1    Polyleft            Num       District polygon Id to
                                        the left side of the line
     2    Polyright           Num       District polygon Id to
                                        the right side of the
                                        line
     3    N                   Num       Number of following
                                        Longitude-Latitude pairs
                                        in decimal degrees
     4    Longitude 1st pair  Float     Explicit decimal}
     5    Latitude 1st pair   Float     Explicit decimal} 

     Long.-Lat. pairs         Float     Shape points of the link
     repeat N-2 times         Float     in pairs of long.-lat.

     Longitude last pair      Float     Explicit decimal}
     Latitude last pair       Float     Explicit decimal}

DISCUSSION

     The district boundaries in this database do not reflect
     changes made during the last part of 103rd tenure due to
     late or court mandated redistricting.