EPA Environmental Dataset Gateway


Open/Close section Identification Information
Title: Census 2010 Block Polygons, US EPA Region 9, 2010, US Census Bureau
Abstract: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Geography: The TIGER Line Files are feature classes and related database files (.) that 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 File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by non visible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2010 Census blocks nest within every other 2010 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces. SF1 Table: This table contains population data derived from the U.S. Census 2010 Summary file 1 database for blocks. The 2010 Summary File 1 (SF 1) contains data compiled from the 2010 Decennial Census questions. This table contains demographic population data including ancestry groups, age, and sex.</SPAN></P></DIV></DIV></DIV>
Publisher: U.S. Department of Commerce, U.S. Census Bureau, Geography Division and US Environmental Protection Agency
Open/Close section Distribution Information
Format Name: TGRSHP (compressed)
Resource Link: http://www.census.gov/geo/www/tiger
Open/Close section Online Resource
Resource Link: http://www.census.gov/geo/www/tiger
Open/Close section Online Resource
Resource Link: https://edg.epa.gov/clipship/
Open/Close section Reference System Information
Data Type: Vector
Open/Close section Spatial Domain
West Bounding Longitude: -179.231086
South Bounding Latitude: 17.831509
East Bounding Longitude: 179.859681
North Bounding Latitude: 71.441059
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Open/Close section Constraints
License https://edg.epa.gov/EPA_Data_License.html
Access: Unclassified
Use: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The TIGER Line feature class products are not copyrighted however TIGER Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER Line feature classes are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER Line feature classs have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest. None. Please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated.</SPAN></P></DIV></DIV></DIV>
Open/Close section Data Quality Information
Scope (quality information applies to): dataset
Open/Close section Data Theme
Theme Topics: Administrative and Political Boundaries, Cultural, Society and Demography
Open/Close section Contact Information
Organization: U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Email: geo.tiger@census.gov
Address: 4600 Silver Hill Road, Stop 7400
City: Washington
State: DC
Postal Code: 20233-7400
Telephone: 301-763-1128
Fax: 301-763-4710
Open/Close section General Information
Publisher Document Identifier: 72AD2B14-1A87-41CE-B2E4-281E605819F1
Metadata Date Stamp: 2017-09-20
Organization: U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch
Organization Role: Publisher
Open/Close section Metadata Reference Information
Metadata Standard Version: 1.0