TIGER/Line Shapefile, 2012, Series Information File for the Current County Subdivision State-based Shapefile

county subdivisions are the primary divisions of counties and their equivalent entities for the reporting of census bureau data they include legally recognized minor civil divisions mcds and statistical census county divisions ccds and unorganized territories for the 2010 census the mcds are the primary governmental and or administrative divisions of counties in 29 states and puerto rico tennessee changed from having ccds for census 2000 to having mcds for the 2010 census in mcd states where no mcd exists or is not defined the census bureau creates statistical unorganized territories to complete coverage the entire area of the united states puerto rico and the island areas are covered by county subdivisions the boundaries of most legal mcds are as of january 1 2013 as reported through the census bureau s boundary and annexation survey bas the boundaries of all ccds delineated in 21 states are those as reported as part of the census bureau s participant statistical areas program psap for the 2010 census the tiger line shapefiles and related database files dbf are an extract of selected geographic and cartographic information from the u s census bureau s master address file topologically integrated geographic encoding and referencing maf tiger database mtdb the mtdb represents a seamless national file with no overlaps or gaps between parts however each tiger line shapefile is designed to stand alone as an independent data set or they can be combined to cover the entire nation