# The files provide the digital map base for a Geographic Information System or mapping software. The files do not contain any mapping software. # Contain the boundaries for legal entities as of January 1, 2009. # They include spatial data for geographic features such as roads, railroads, rivers, and lakes, as well as legal and statistical geographic areas that correspond to the 2009 American Community Survey, 2009 Population Estimates, 2007 Economic Census, and Census 2000.