Documentation: Census 1990
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Publisher: U.S. Census Bureau
Survey: Census 1990
Document: Summary Tape File 1
citation:
Social Explorer, U.S. Census Bureau; Census of Population and Housing, 1990: Summary Tape File 1 on CD-ROM [machine-readable data files] / prepared by the Bureau of the Census. Washington: The Bureau [producer and distributor], 1991.
Summary Tape File 1
Chapter 1. Abstract
Citation
Census of Population and Housing, 1990: Summary Tape File 1 on CD-ROM (Name of State) [machine-readable data files] / prepared by the Bureau of the Census.--Washington: The Bureau [producer and distributor], 1991.

Type of File
Summary statistics.

Universe Description
All persons and housing units in the United States.

Subject Matter Description
Summary Tape File 1 (STF 1) contains 100-percent data. Population items include age, race, sex, marital status, Hispanic origin, household type, and household relationship.

Population items are cross tabulated by age, race, Hispanic origin, or sex. Housing items include occupancy/vacancy status, tenure, units in structure, contract rent, meals included in rent, value, and number of rooms in housing unit. Housing data are cross tabulated by race or Hispanic origin of householder or by tenure. Selected aggregates and medians also are provided. Data are presented in 37 population tables (matrices) and 63 housing tables (matrices).

Geographic Coverage
Summary Tape File 1 is released as file 1A, file 1B, file 1C, and file 1D. The record layout is identical for all four files but the geographic coverage differs.

This abstract lists most frequently accessed geographic levels. The Summary Level Sequence Charts chapter outlines the hierarchical and inventory summaries in their entirety.
STF 1A provides data for States and their subareas in hierarchical sequence down to the block group level. This hierarchy is shown below:

State
  County
    County subdivision
      Place (or place part)
        Census tract/block numbering area
          (BNA) (or census tract/BNA part)
            Block group (or block group part)
State portion of American Indian and Alaska
  Native area (with trust lands and with no trust lands)
  County portion of American Indian and Alaska Native area

File 1A also has inventory (complete) summaries for the following geographic areas:

Place
Census tract/BNA
Block group
Congressional District (101st Congress)
Consolidated cities

STF 1B is not available on this CD-ROM. An extract of STF 1B will be available as a separate CD-ROM product. The complete STF 1B file is available only on tape.
STF 1C provides summaries for the entire United States. The file structure is as follows:

United States
Region
Division
  State
    County
      County subdivision (12 States, population restricted)
        Places of 10,000 or more persons
          Consolidated city
Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area
(MSA/CMSA)
  Consolidated Metropolitan Statistical Area/Primary Metropolitan
    Statistical Area
Urbanized Area (UA)
Total, State and county portion of American Indian reservations (with trust
lands and with no trust lands) and Alaska Native Areas

Inventory summaries are provided for the geographic area listed below:

Alaska Native Regional Corporation
STF 1D is not available on CD-ROM.

Related Printed Reports
Listed below are the 1990 census printed reports containing data from STF 1. These reports will be available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.

1990 CPH-1, Summary Population and Housing Characteristics . A report for the United States, each State, and the District of Columbia, which contains 100-percent data for the State, local governmental units (counties, places, and towns/townships), other county subdivisions, and American Indian and Alaska Native Areas. Scheduled for release in 1991-92.

1990 CPH-2, Population and Housing Unit Counts . A report for the United States, each State, and the District of Columbia and statistically equivalent entities, which provides 100-percent data for States, counties, county subdivisions, places, State component parts for metropolitan areas and urbanized areas, and summary geographic areas (for example, urban and rural, metropolitan and nonmetropolitan). Scheduled for release in 1991-92.

1990 CPH-4, Population and Housing Characteristics for Congressional Districts of the 103rd Congress . A report for each State and the District of Columbia, which provides both 100-percent and sample data for States, congressional districts and, within congressional districts, counties, places of 10,000 or more inhabitants, and, in 12 States, county subdivisions of 10,000 or more inhabitants, and American Indian and Alaska Native areas. Scheduled for release in 1993.

Related Reference Materials
1990 Census of Population and Housing Tabulation and Publication Program.This booklet provides descriptions of the data products available from the 1990 census. Available without charge from Customer Services, Data User Services Division, Bureau of the Census, Washington, DC 20233. Phone: 301-763-4100. FAX: 301-763-4794.
Census '90 Basics. This booklet provides a general overview of the census activity and detailed information on census content, geographic areas, and products. Available without charge from Customer Services (see above).

Census ABC's Applications in Business and Community. This booklet highlights key information about the 1990 census and illustrates a variety of ways the data can be used. Available without charge from Customer Services (see above).

A comprehensive 1990 Census of Population and Housing Guide will be available in late 1991. It will provide detailed information about all aspects of the census.
Software
Data retrieval software is on the CD-ROM. It can be accessed by typing GO.

Technical Description
The data files on the CD-ROM are in dBASE III+TM format. The files for each State are labeled. STF 1A files are labeled STF1A0ss.DBF through STF1A9ss.DBF where 'ss' is the two-character State abbreviation. No State file will occupy more than one CD-ROM. (Information on STF 1C files will be available later.)

File Availability
CD-ROM's are released for States or groups of States as the files become available. The STF 1A CD-ROM's will be issued in the early fall of 1991. The STF 1C CD-ROM products will be released in 1992. Cost of each CD-ROM is $150.