{A767674A-2BFB-4612-B42F-7A80D96002E0} ISO 19115 Topic Category society EPA GIS Keyword Thesaurus Human None Alabama Alaska American Samoa Arizona Arkansas California Canada Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Mexico Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas United States Utah Vermont Virginia Washington Washington DC West Virginia Wisconsin Wyoming User Human US Environmental Protection Agency (US EPA) U.S. EPA Office of Environmental Information (OEI) - Office of Information Analysis and Access (OIAA) Washington, DC 20120719 https://edg.epa.gov/metadata https://geodata.epa.gov/arcgis/rest/services/OEI/ACS_Demographics_by_Tract_2006_2010/MapServer Publication date 20111220 Complete As needed -138.21454852 -12.68151645 61.7110157 6.65223303 None. None. Please check sources, scale, accuracy, currency 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. This map service displays data derived from the 2006-2010 American Community Survey (ACS). Values derived from the ACS and used for this map service include: Total Population, Population Density (per square mile), Percent Minority, Percent Below Poverty Level, Percent Age (less than 5, less than 18, and greater than 64), Percent Housing Units Built Before 1950, Percent (population) 25 years and over (with less than a High School Degree and with a High School Degree), Percent Linguistically Isolated Households, Population of American Indians and Alaskan Natives, Population of American Indians and Alaskan Natives Below Poverty Level. The map service was created for inclusion in US EPA mapping applications. To provide value-added geographic summary-level tables for US EPA use. https://project-open-data.cio.gov/schema/#accessLevel public Standard Technical Controls U.S. Environmental Protection Agency, Research Triangle Park EPA GIS Agency Central Support OEI RTP NCC GIS mailing address

USEPA Mailroom N127-02

Research Triangle Park NC 27711 919-767-7493 esrisupport@epa.gov Tests for integrity have not been performed. Features represented have not been tested for completeness Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at http://epa.gov/geospatial/policies.html 201112 SAIC Contractors to the EPA OIAA created the summary data tables. 20120714 Created metadata for map service. Live Data and Maps https://edg.epa.gov/EPA_Data_License.html U.S. Environmental Protection Agency, Research Triangle Park EPA GIS Agency Central Support OEI RTP NCC GIS mailing address

USEPA Mailroom N127-02

Research Triangle Park NC 27711 919-767-7493 esrisupport@epa.gov 20120719 20160719 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 U.S. Environmental Protection Agency, Research Triangle Park EPA GIS Agency Central Support OEI RTP NCC GIS mailing address

USEPA Mailroom N127-02

Research Triangle Park NC 27711 919-767-7493 esrisupport@epa.gov U.S. Census Tract Derived Population Data Census Tracts are small, relatively permanent statistical subdivisions of a county or equivalent entity that are updated by local participants prior to each decennial census as part of the Census Bureau's Participant Statistical Areas Program. The Census Bureau delineates census tracts in situations where no local participant existed or where state, local, or tribal governments declined to participate. The primary purpose of census tracts is to provide a stable set of geographic units for the presentation of statistical data. Census tracts generally have a population size between 1,200 and 8,000 people, with an optimum size of 4,000 people. A census tract usually covers a contiguous area; however, the spatial size of census tracts varies widely depending on the density of settlement. Census tract boundaries are delineated with the intention of being maintained over a long time so that statistical comparisons can be made from census to census. Census tracts occasionally are split due to population growth or merged as a result of substantial population decline. Census tract boundaries generally follow visible and identifiable features. They may follow nonvisible legal boundaries, such as minor civil division (MCD) or incorporated place boundaries in some states and situations, to allow for census-tract-to-governmental-unit relationships where the governmental boundaries tend to remain unchanged between censuses. State and county boundaries always are census tract boundaries in the standard census geographic hierarchy. Tribal census tracts are a unique geographic entity defined within federally recognized American Indian reservations and off-reservation trust lands and can cross state and county boundaries. Tribal census tracts may be completely different from the census tracts and block groups defined by state and county (see 'Tribal Census Tract'). U.S. Census Bureau SAIC Contractors to the EPA OIAA created the derived data tables. American Community Survey Summary File Technical Documentation, available at https://www.census.gov/acs/www/data_documentation/summary_file/ 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 1980 6378137.000000 298.257222