tIGERThe The TIGER/Line shapefile data includes complete coverage of the contiguous United States, Alaska, Hawaii, Puerto Rico, the U.S. Virgin Islands, American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the Midway Islands.
TIGER includes both land features such as roads, rivers, and lakes, as well as areas such as counties, census tracts, and census blocks. Some of the geographic areas represented in TIGER are political areas, including state and federally recognized tribal lands, cities, counties, congressional districts, and school districts. Others are statistical areas, including Metropolitan Statistical Areas (MSA), census tracts, census block groups, and census blocks. ZIP Code Tabulation Areas (ZCTA) are quasi-statistical areas which attempt to approximate, but do not exactly match, the delivery areas of USPS ZIP codes.[1] ZIP codes are not truly areas, but rather a group of deliverable addresses.[2] Some or all of an existing ZIP code's addresses may be reassigned to a new ZIP if there is sufficient growth within a given postal ZIP Code. As many as 3% of ZIP codes undergo change each quarter. Thus, the 5-digit ZCTAs are of limited value in areas of growth or change.
Future[edit]
TIGER data published through February 2007 (2006 Second Edition) were in a custom text-based format formally known as TIGER/Line files. In 2008, data in shapefile format was published. The Census Bureau has made the data available through WMS servers.[3] The data forms a base for OpenStreetMap in the USA, and also was used for the initial import of US map data into the Waze navigation system.
References[edit]
^ Marx, Robert W. (1990). "The TIGER system: automating the geographic structure of the United States Census". In Peuquet, Donna J.; Duane Francis Marble (eds.). Introductory Readings in Geographic Information Systems. CRC Press. ISBN 0-85066-857-3.
^ See ZIP Code#By geography.
^ Future of TIGER data, U.S. Census Bureau
External links[edit]
Wikimedia Commons has media related to United States Census TIGER maps.
United States Census Bureau geography/Line shapefile data includes complete coverage of the contiguous United States, Alaska, Hawaii, Puerto Rico, the U.S. Virgin Islands, American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the Midway Islands.
TIGER includes both land features such as roads, rivers, and lakes, as well as areas such as counties, census tracts, and census blocks. Some of the geographic areas represented in TIGER are political areas, including state and federally recognized tribal lands, cities, counties, congressional districts, and school districts. Others are statistical areas, including Metropolitan Statistical Areas (MSA), census tracts, census block groups, and census blocks. ZIP Code Tabulation Areas (ZCTA) are quasi-statistical areas which attempt to approximate, but do not exactly match, the delivery areas of USPS ZIP codes.[1] ZIP codes are not truly areas, but rather a group of deliverable addresses.[2] Some or all of an existing ZIP code's addresses may be reassigned to a new ZIP if there is sufficient growth within a given postal ZIP Code. As many as 3% of ZIP codes undergo change each quarter. Thus, the 5-digit ZCTAs are of limited value in areas of growth or change.
Future[edit]
TIGER data published through February 2007 (2006 Second Edition) were in a custom text-based format formally known as TIGER/Line files. In 2008, data in shapefile format was published. The Census Bureau has made the data available through WMS servers.[3] The data forms a base for OpenStreetMap in the USA, and also was used for the initial import of US map data into the Waze navigation system.
References[edit]
^ Marx, Robert W. (1990). "The TIGER system: automating the geographic structure of the United States Census". In Peuquet, Donna J.; Duane Francis Marble (eds.). Introductory Readings in Geographic Information Systems. CRC Press. ISBN 0-85066-857-3.
^ See ZIP Code#By geography.
^ Future of TIGER data, U.S. Census Bureau
External links[edit]
Wikimedia Commons has media related to United States Census TIGER maps.
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