What Does The Name TIGER Mean?
The term TIGER comes from the acronym Topographically Integrated Geographic Encoding and Referencing which is the name for the system and digital data base developed at the Census Bureau to support its mapping needs for the Decennial Census and other Bureau programs.
What Is TIGER?
The Census Bureau's Census TIGER System automates the mapping
and related geographic activities required to
support the decennial census and sample survey programs of
the Census Bureau starting with the 1990 decennial census.
The Census TIGER System provides support for the following:
The design of the Census TIGER data base adapts the
theories of topology, graph theory, and associated fields
of mathematics to provide a disciplined, mathematical
description for the geographic structure of the United
States and its territories. The topological structure of
the Census TIGER data base defines the location and
relationship of streets, rivers, railroads, and other
features to each other and to the numerous geographic
entities for which the Census Bureau tabulates data from
its censuses and sample surveys. It is designed to assure
no duplication of these features or areas.
- Creation and maintenance of the digital geographic data
base that includes complete coverage of the United
States, Puerto Rico, the Virgin Islands of the United
States, American Samoa, Guam, the Commonwealth of the
Northern Mariana Islands, the Republic of Palau, the
other Pacific entities that were part of the Trust
Territory of the Pacific Islands (the Republic of the
Marshall Islands and the Federated States of
Micronesia), and the Midway Islands.
- Production of maps from the Census TIGER data base for
all Census Bureau enumeration and publication programs.
- Ability to assign individual addresses to geographic
entities and census blocks based on polygons formed by
features such as roads and streams.
The building of the Census TIGER data base integrated a
variety of encoding techniques such as automated map
scanning, manual map "digitizing," standard data keying,
and sophisticated computer file matching. The goal was to
provide automated access to and retrieval of relevant
geographic information about the United States and its
TIGER Data Base Extracts
In order for others to use the information in the Census TIGER
data base in a geographic information system (GIS) or for other
geographic applications, the Census Bureau releases periodic
extracts of this data base to the public, including the
Last Revised: Tuesday, 01-Oct-96 11:03:42