Accessing & Using TIGER/Line Files
Start using augmented TIGER/Line shapefiles and related datasets available through the TIGER/Digital Map Database (DMD). TIGER/DMD includes a wide range of augmented features and content -- with 100% crosswalk to original TIGER/Line. More about TIGER/DMD.
The Census Bureau TIGER shapefiles contain data that can be used to represent different types of point, line, and polygon geography covering the U.S. earth surface. More about TIGER. The TIGER shapefiles, and related derivative products, play an important role in wide-ranging geospatial analyses and decision-making information solutions. Warren Glimpse, founder of ProximityOne, developed the Columbia, MO GBF/DIME file used as the prototype for the TIGER/Line program and is developer of CV XE GIS desktop and Web-based GIS applications/tools that facilitate use of the TIGER/Line data with other wide-ranging data in applications such as pattern/trend analysis, geospatial processing and location-based operations. Glimpse worked with hundreds of government agencies on the Census 2010 LUCA program to improve the coverage and content of the TIGER/Line files.
TIGER/Line Vintages & Access/Integration
The 2012 vintage of the Census Bureau TIGER shapefiles were released in August 2012 and reflect many improvements to the Census 2010 vintage as well as updates to various political and statistical geographic areas. The 2013 redistricting version of TIGER, released in January 2013, reflects boundaries of the 113th Congressional Districts, state legislative districts and other selected updates. The 2013 vintage TIGER will be released in late summer/early fall 2013 and will reflect continuing improvements as well as annual updates to various political and statistical geographic areas including the 2013 vintage metropolitan area/Core-Based Statistical Areas.
TIGER/Line Editor & Digital Map Database
Use the CV XE GIS TIGER Editor to improve TIGER files to meet a broader set of geocoding, routing and geospatial application needs. Resolve issues such as missing or poorly structured line segments, improperly named line segments, line segments with missing names and address ranges, among others.
The TIGER Editor is used to develop/maintain the Digital Map Database (DMD). DMD data are structured in a manner compatible with TIGER and maintain a near 100-percent crosswalk between DMD segments and TIGER segments. TIGER-related augmentations include:
adding and updating road segments with right- and left-side geocoding to the census block level
adding/updating address ranges for road segments where missing/incomplete in original files.
adding alternative road names.
reclassifying roads (e.g. some counties have too many/too few roads classified as primary/secondary).
coding right- and left-side road segments with ZIP+4 Codes.
Role and Scope of TIGER/Line Shapefiles
TIGER/Line shapefiles are created from the Census Bureau's TIGER (Topologically Integrated Geographic Encoding and Referencing) database of selected geographic and cartographic information. TIGER is used by the Census Bureau to support the mapping and related geographic activities required by the decennial and economic censuses and statistical survey programs. TIGER/Line shapefiles are available for public use and are typically used to provide the digital map base for GIS (Geographic Information System) and mapping applications.
TIGER/Line files are digital, vector-based point, line and polygon shapefiles and related files. TIGER/Line shapefiles do not contain any demographic or other subject matter data though wide-ranging subject matter data can be knit-together with the shapefiles. Reference and thematic maps may be created using TIGER/Line shapefiles using GIS or mapping software like CV XE GIS. The TIGER/Line shapefiles include:
boundary shapefiles for all Census 2010/2000 political and statistical tabulation areas.
post-2010 annual releases; updates for political areas and selected geography.
water and landmark area polygon shapefiles.
road, rail, water and related line/segment-oriented shapefiles.
point and specific location shapefiles (schools, shopping centers, neighborhoods, etc.)
related reference files that facilitate geospatial processing.
Census 2010 & later TIGER/Line files reflect:
- overall improvements and updates resulting from the Census 2010 LUCA program.
- extensive qualititative and coverage improvement for roads/streets.
Importance of TIGER/Line Shapefiles
Visual analysis made possible by maps is essential to effective decision-making. Development of underlying data often depends on the ability to relate data organized by one type of geography to data organized for another type of geography. The Census Bureau TIGER/Line shapefiles play an indispensable role in meeting these needs. They provide the underlying vector-oriented geographic data used in most U.S. mapping and GIS applications.
ProximityOne develops geographic-demographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data. Follow ProximityOne on Twitter at www.twitter.com/proximityone. Contact ProximityOne (888-364-7656) with questions about data covered in this section or to discuss custom estimates, projections or analyses for your areas of interest.