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boundaries
society
Census
Block
Voting District
Legislative District
Tract
School District
Redistricting
Missouri
U.S. Census Bureau
P.L. 94-171 Reference Maps (2010 Census)
U.S. Census Bureau
Washington D.C.
2013-04-23
ftp://msdis.missouri.edu/pub/census2010/PDFmaps/
http://www.msdis.missouri.edu/data/census/census2010/index.html
Public Law (P.L.) 94-171, enacted in 1975, directs the U.S. Census Bureau to make special preparations to provide redistricting data needed by the 50 states. It specifies that within a year following Census Day (by April 1, 2011), the Census Bureau must send the governor and legislature in each state the data they need to redraw districts for the United States Congress and state legislature. The Census 2010 Redistricting Data Program was set up to afford state officials an opportunity to define the small areas for which they wish to receive census population totals for redistricting purposes. Officials then could receive data for voting districts (e.g., election precincts, wards, state house and senate districts) in addition to standard census geographic areas, such as counties, cities, census tracts, and blocks. State participation in defining areas is voluntary and nonpartisan.
There are four map types that support the 2010 Census Redistricting Data (Public Law [P.L.] 94-171) program. Each of these large format map types is produced in Adobe’s portable document format (PDF). These georeferenced PDF files were created in compliance with the OGC PDF Geo-registration Encoding Best Practice Version 2.2 (OGC project document reference number OGC 08-139r2). They will also be available through the U.S. Census Bureau Map Products web site. In addition to the maps, other geographic products include the State Redistricting Data (P.L.94-171) Shapefiles and the 2010 Census Block Assignment Files, which provide census block relationships to voting districts, state legislative districts, school districts, and congressional districts.
All four map types are produced in a set for each county or statistically equivalent entity (school district maps for the District of Columbia, Florida, Hawaii, Maryland, Nevada, and West Virginia are state-based). Each map set consists of one or more numbered parent sheets which cover the entire county. If necessary, separate inset sheets show areas of dense features at a larger scale. Inset areas are identified with letters. If the set has more than one parent sheet, an index sheet is also included which depicts the arrangement of the parent sheets and inset areas in relation to the county boundary and selected major features. All of the parent sheets within a county are produced at the same scale, while maps for adjacent counties may be at different scales. The objective of each map type is to use the smallest number of sheets while preserving legibility of geographic entity names and feature identifiers. The physical size of the county and the density of features also affect the number of parent sheets and insets.
Reference maps are designed to show the geographic locations of features and boundaries. These maps usually contain features, such as roads and rivers, and boundaries, such as county, place, census tracts, or many more. These maps do not contain demographic data and are used solely to show the location of and relationship between boundaries and features. For interactive reference maps see TIGERweb.
2010
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180
90
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None
U.S. Census Bureau
4600 Silver Hill Road
Washington
District of Columbia
20233
301-763-INFO (4636)
Static Map Images
U.S. Census Bureau
4600 Silver Hill Road
Washington
District of Columbia
20233
301-763-INFO (4636)
2013-04-23
FGDC Content Standards for Digital Geospatial
FGDC-STD-001-1998
GRC
Martin Wills
17 Stewart Hall
Columbia
Missouri
65211
573-884-6959
willsm@missouri.edu