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Data Visualization: Intro with Data
PUMA Equivalency Files
Each PUMS file provides records for states and many of their geographic levels. The 5% sample identifies every state and various subdivisions of states called "Public User Microdata Areas," each with at least 100,000 persons. These PUMAs were primarily based on counties, and may be whole counties, groups of counties, and places. When these entities have more than 200,000 persons, PUMAs can represent parts of counties, places, etc. None of these PUMAs on the 5% sample cross state lines.
On the other hand, the 1% sample was based primarily on metropolitan/nonmetropolitan areas, and contains PUMAs which were made from whole central cities, whole MSAs or PMSAs outside the central city, groups of MSAs or PMSAs, and groups of areas outside MSAs or PMSAs. When the areas have more than 200,000 persons, 1% PUMAs can represent parts of central cities, MSA/PMSAs, and so forth. 1% PUMAs may cross state lines and in that case state codes are not shown.
The following files represent the PUMA or county group definitions for 2000, 1990, and 1980 respectively. There are two versions of the equivalency data for 2000 and 1990. The first format is a visually pleasing list for each PUMS (directory format). The second version is a machine-readable format (data format) that requires a codebook to identify column locations.
Note: The 1980 equivalency files are provided in directory format only.
The following represents lines exerted from a 1990 directory format file.
COMPONENTS OF 5% SAMPLE PUMAs ------------------------------------------------------------------ STATE: 06 PUMA: 06901 MSA/PMSA: 6780 TOTAL POPULATION: 193688 TYPE OF AREA: COUNTY/INDEPENDENT CITY(PART) NAME POPULATION ST COU MCD PLACE TRACT MSA/PMSA CATHEDRAL CITY 30085 06 065 0465 6780 COACHELLA 16896 06 065 0555 6780 DESERT HOT SPRINGS 11668 06 065 0765 6780 INDIAN WELLS 2647 06 065 1327 6780 INDIO 36793 06 065 1330 6780 LA QUINTA 11215 06 065 1482 6780 PALM DESERT 23252 06 065 2080 6780 PALM SPRINGS 40181 06 065 2085 6780 RANCHO MIRAGE 9887 06 065 2281 6780 RIVERSIDE COUNTY (PART) 3869 06 065 010 9999 044903 6780 RIVERSIDE COUNTY (PART) 13 06 065 010 9999 044901 6780 RIVERSIDE COUNTY (PART) 1719 06 065 020 9999 045201 6780 RIVERSIDE COUNTY (PART) 1951 06 065 020 9999 045202 6780 RIVERSIDE COUNTY (PART) 3533 06 065 030 9999 044502 6780 RIVERSIDE COUNTY (PART) 88 06 065 075 9999 044803 6780 ------------------------------------------------------------------- STATE: 01 PUMA: 00300 MSA/PMSA: 9999 TOTAL POPULATION: 126433 TYPE OF AREA: COUNTIES/INDEPENDENT CITIES (2 OR MORE) NAME POPULATION ST COU MCD PLACE TRACT MSA/PMSA BIBB COUNTY 16576 01 007 9999 FAYETTE COUNTY 17962 01 057 9999 GREENE COUNTY 10153 01 063 9999 HALE COUNTY 15498 01 065 9999 LAMAR COUNTY 15715 01 075 9999 MARION COUNTY 29830 01 093 9999 PICKENS COUNTY 20699 01 107 9999 ------------------------------------------------------------------- COMPONENTS OF 1% SAMPLE PUMAs ------------------------------------------------------------------- STATE: 06 PUMA: 01802 MSA/PMSA: 5775 TOTAL POPULATION: 122246 TYPE OF AREA: MSA/PMSA-OUTSIDE CENTRAL CITY (PART) NAME POPULATION ST COU MCD PLACE TRACT MSA/PMSA CLAYTON 7317 06 013 0537 5775 CONCORD 111348 06 013 0595 5775 CONTRA COSTA COUNTY(PART) 1061 06 013 028 9999 315099 5775 CONTRA COSTA COUNTY(PART) 655 06 013 028 9999 333100 5775 CONTRA COSTA COUNTY(PART) 126 06 013 028 9999 338100 5775 CONTRA COSTA COUNTY(PART) 7 06 013 028 9999 355200 5775 CONTRA COSTA COUNTY(PART) 517 06 013 028 9999 315000 5775 CONTRA COSTA COUNTY(PART) 114 06 013 028 9999 355305 5775 CONTRA COSTA COUNTY(PART) 81 06 013 028 9999 355304 5775 CONTRA COSTA COUNTY(PART) 238 06 013 028 9999 355303 5775 CONTRA COSTA COUNTY(PART) 6 06 013 028 9999 355301 5775 CONTRA COSTA COUNTY(PART) 68 06 013 028 9999 355302 5775 CONTRA COSTA COUNTY(PART) 708 06 013 107 9999 355102 5775 ------------------------------------------------------------------