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1997•The Cartographic JournalRequires access

A Digital Map of Public-Use Microdata Areas in the 1990 U.S. Census

William H. Walters

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Abstract

Public-Use Microdata Areas (PUMAs) are the smallest geographic units for which many U.S. Census variables are reported. In particular, 1990 microdata records for households and individuals can be aggregated only by PUMA, metropolitan area, state, and region. The Census Bureau distributes maps of these PUMAs only on paper, however, and only for individual states. This note describes the construction of a national, digital base map of the PUMAs used in the 1990 U.S. Census microdata files (5% sample). The 1% sample of households has a separate set of PUMAs which do not correspond to those in the 5% sample.

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What this paper is about

Public-Use Microdata Areas (PUMAs) are the smallest geographic units for which many U.S. Census variables are reported. In particular, 1990 microdata records for households and individuals can be aggregated only by PUMA, metropolitan area, state, and region. The Census Bureau distributes maps of these PUMAs only on paper, however, and only for individual states. This note describes the construction of a national, digital base map of the PUMAs used in the 1990 U.S. Census microdata files (5% sample). The 1% sample of households has a separate set of PUMAs which do not correspond to those in the 5% sample.

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Available abstract

Public-Use Microdata Areas (PUMAs) are the smallest geographic units for which many U.S. Census variables are reported. In particular, 1990 microdata records for households and individuals can be aggregated only by PUMA, metropolitan area, state, and region. The Census Bureau distributes maps of these PUMAs only on paper, however, and only for individual states. This note describes the construction of a national, digital base map of the PUMAs used in the 1990 U.S. Census microdata files (5% sample). The 1% sample of households has a separate set of PUMAs which do not correspond to those in the 5% sample.

Key concepts: Microdata (statistics), Census, Metropolitan area, American Community Survey, Public use, Geography, Cartography, Regional science

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