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QGIS has a built-in driver for the TIGER data, as you've noted, through GDAL. This is exposed through the GUI in the Data Source. TIGER/Line Shapefile, 2018, Series Information for the All Roads County-based Shapefile Metadata Updated: October 18, 2019 The TIGER/Line shapefiles and related database files (.dbf) 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).
Contents.StatusIt is unlikely that the TIGER data ever will be imported again. Enough editing has occurred since the original upload of the data (which was not uploaded until 2007) that it will be difficult to determine if differences between future TIGER and OSM are because of good corrections made by OSM editors or from bad TIGER data. With the US mapping community growing strongly now, it isn't as much of a concern. Do not worry about getting your work overwritten by new TIGER data. Go map!However, TIGER may be useful for analyzing differences with OSM, and for partial import and merging using tools such as. Please visit the page for the latest release of TIGER data for more information, which is currently.Lots of cleanup remains to be done from the initial import. The page lists things to look for when fixing TIGER data.HistoryAn import of the 2005 TIGER/Line data was completed in 2007.
This was featured in a Linux.com article from January 23, 2008, titled '.An initial run took place in 2005, but unfortunately had to be shut off, and data purged, in November 2006 due to data integrity problems. See for more information. A second, successful import followed a different philosophy, and began in September 2007 using a new Ruby-based TIGER conversion script. Here is describing this import in more detail. Also see the page.UpdatesThe Census Bureau releases updated TIGER data annually. Check the following pages for OpenStreetMap notes regarding specific TIGER releases:. the most recent data.See also.
attribute map used for data prior to 2007, when the switch was made to using MTFCC's instead of CFCC'sExternal links. (since 2007; 2006 and eariler available in ASCII). (since 2013).
TIGER logo
Topologically Integrated Geographic Encoding and Referencing, or TIGER, or TIGER/Line is a format used by the United States Census Bureau to describe land attributes such as roads, buildings, rivers, and lakes, as well as areas such as census tracts. TIGER was developed to support and improve the Bureau's process of taking the Decennial Census.
The TIGER files do not contain the census demographic data, but merely the geospatial/map data. GIS can be used to merge census demographics or other data sources with the TIGER files to create maps and conduct analysis. TIGER data is available without cost because U.S. Government publications are required to be released into the public domain.
![Virginia roads shapefile Virginia roads shapefile](https://s3.manualzz.com/store/data/031908415_1-8c2c4da60f79f7a73b4de08b79d105fc.png)
![Tiger Road Shapefile Tiger Road Shapefile](/uploads/1/2/7/5/127562103/562818267.png)
Coverage[edit]
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 USPSZIP codes.[1]ZIP codes are not truly areas, but rather a group of deliverable addresses. 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.[citation needed]
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.[2] 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. ISBN0-85066-857-3.
- ^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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