ISO 19115 Topic Categories boundaries U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Cartographic Products and Services Branch 20200521 mapDigital The 2019 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. Block Groups (BGs) are clusters of blocks within the same census tract. Each census tract contains at least one BG, and BGs are uniquely numbered within census tracts. BGs have a valid code range of 0 through 9. BGs have the same first digit of their 4-digit census block number from the same decennial census. For example, tabulation blocks numbered 3001, 3002, 3003,.., 3999 within census tract 1210.02 are also within BG 3 within that census tract. BGs coded 0 are intended to only include water area, no land area, and they are generally in territorial seas, coastal water, and Great Lakes water areas. Block groups generally contain between 600 and 3,000 people. A BG usually covers a contiguous area but never crosses county or census tract boundaries. They may, however, cross the boundaries of other geographic entities like county subdivisions, places, urban areas, voting districts, congressional districts, and American Indian / Alaska Native / Native Hawaiian areas. The generalized BG boundaries in this release are based on those that were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2010 Census. These files were specifically created to support small-scale thematic mapping. To improve the appearance of shapes at small scales, areas are represented with fewer vertices than detailed TIGER/Line Shapefiles. Cartographic boundary files take up less disk space than their ungeneralized counterparts. Cartographic boundary files take less time to render on screen than TIGER/Line Shapefiles. You can join this file with table data downloaded from American FactFinder by using the AFFGEOID field in the cartographic boundary file. If detailed boundaries are required, please use the TIGER/Line Shapefiles instead of the generalized cartographic boundary files. 202005 202005 publication date Completed notPlanned -88.473227 -84.88908 35.008028 30.223334 None 2019 KML Block Group Cartographic Boundary Census Tract County Generalized National Standard Codes (ANSI INCITS 38-2009), Federal Information Processing Series (FIPS) - States/State Equivalents Alabama AL unrestricted copyright otherRestrictions Use Constraints:The intended display scale for this file is 1:500,000. This file should not be displayed at scales larger than 1:500,000. 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 is for visual display at appropriate small scales only. Cartographic boundary files should not be used for geographic analysis including area or perimeter calculation. Files should not be used for geocoding addresses. Files should not be used for determining precise geographic area relationships. U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Customer Services Branch

4600 Silver Hill Road

Washington DC 20233-7400 United States 301.763.1128 geo.geography@census.gov 301.763.4710 originator UTF-8 eng U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Customer Services Branch

4600 Silver Hill Road

Washington DC 20233-7400 United States 301.763.1128 geo.geography@census.gov 301.763.4710 distributor No warranty, expressed or implied is made with regard to the accuracy of these data, and no liability is assumed by the U.S. Government in general or the U.S. Census Bureau in specific as to the spatial or attribute accuracy of the data. The act of distribution shall not constitute any such warranty and no responsibility is assumed by the U.S. government in the use of these files. The boundary information is for small-scale mapping purposes only; boundary depiction and designation for small-scale mapping purposes do not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions. KML PK-ZIP, version 1.93A or higher https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html text/html https://meta.geo.census.gov/data/existing/decennial/GEO/CPMB/boundary/2019cb/bg_kml/cb_2018_bg_500k.kml.ea.iso.xml text/html The online cartographic boundary files may be downloaded without charge. To obtain more information about ordering Cartographic Boundary Files visit https://www.census.gov/geo/www/tiger. The cartographic boundary files contain geographic data only and do not include display mapping software or statistical data. For information on how to use cartographic boundary file data with specific software package users shall contact the company that produced the software. 201603 series U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch geo.geography@census.gov GeoPlatform Profile of ISO 19115-1 DRAFT Revision 1 UTF-8 SeriesInfo2019BGKML.gpm.xml eng