Introducing a new way to navigate by topics. Access the latest news, data, publications and more around topics of interest.
Our population statistics cover age, sex, race, Hispanic origin, migration, ancestry, language use, veterans, as well as population estimates and projections.
This section provides information on a range of educational topics, from educational attainment and school enrollment to school districts, costs and financing.
We measure the state of the nations workforce, including employment and unemployment levels, weeks and hours worked, occupations, and commuting.
Our statistics highlight trends in household and family composition, describe characteristics of the residents of housing units, and show how they are related.
Health statistics on insurance coverage, disability, fertility and other health issues are increasingly important in measuring the nation's overall well-being.
We measure the housing and construction industry, track homeownership rates, and produce statistics on the physical and financial characteristics of our homes.
The U.S. Census Bureau is the official source for U.S. export and import statistics and regulations governing the reporting of exports from the U.S.
The U.S. Census Bureau provides data for the Federal, state and local governments as well as voting, redistricting, apportionment and congressional affairs.
Search an alphabetical index of keywords and phrases to access Census Bureau statistics, publications, products, services, data, and data tools.
Geography provides the framework for Census Bureau survey design, sample selection, data collection, tabulation, and dissemination.
Geography is central to the work of the Bureau, providing the framework for survey design, sample selection, data collection, tabulation, and dissemination.
Find resources on how to use geographic data and products with statistical data, educational blog postings, and presentations.
The Geographic Support System Initiative will integrate improved address coverage, spatial feature updates, and enhanced quality assessment and measurement.
Work with interactive mapping tools from across the Census Bureau.
Find geographic data and products such as Shapefiles, KMLs, TIGERweb, boundary files, geographic relationship files, and reference and thematic maps.
Metropolitan and micropolitan areas are geographic entities used by Federal statistical agencies in collecting, tabulating, and publishing Federal statistics.
Find information about specific partnership programs and learn more about our partnerships with other organizations.
Definitions of geographic terms, why geographic areas are defined, and how the Census Bureau defines geographic areas.
We conduct research on geographic topics such as how to define geographic areas and how geography changes over time.
Visit our library of Census Bureau multimedia files. Collection formats include audio, video, mobile apps, images, and publications.
Official audio files from the Census Bureau, including "Profile America," a daily series of bite-sized statistics, placing current data in a historical context.
Infographics include information on the Census Bureau's history of data collection, our nation's veterans and the American Community Survey.
Stock photos that illustrate official Census Bureau operations and activities.
Read briefs and reports from Census Bureau experts.
Watch Census Bureau vignettes, testimonials, and video files.
Read research analyses from Census Bureau experts.
Access data through products and tools including data visualizations, mobile apps, interactive web apps and other software.
Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
Find a multitude of DVDs, CDs and publications in print by topic.
These external sites provide more data.
Download extraction tools to help you get the in-depth data you need.
Learn more about our data from this collection of e-tutorials, presentations, webinars and other training materials. Sign up for training sessions.
Explore Census data with interactive visualizations covering a broad range of topics.
Learn how we serve the public as the most reliable source of data about the nation's people and economy.
Information about the U.S. Census Bureau.
Information about what we do at the U.S. Census Bureau.
Our researchers explore innovative ways to conduct surveys, increase respondent participation, reduce costs, and improve accuracy.
Our surveys provide periodic and comprehensive statistics about the nation, critical for government programs, policies, and decisionmaking.
Learn about other opportunities to collaborate with us.
Explore the rich historical background of an organization with roots almost as old as the nation.
Explore prospective positions available at the U.S. Census Bureau.
Information about the current field vacancies available at the U.S. Census Bureau Regional Offices.
Discover the latest in Census Bureau data releases, reports, and events.
The Census Bureau's Director writes on how we measure America's people, places and economy.
Find interesting and quirky statistics regarding national celebrations and major events.
Profile America is a daily, 60-second feature that uses interesting vignettes for that day to highlight information collected by the Census Bureau.
Find media toolkits, advisories, and all the latest Census news.
See what's coming up in releases and reports.
[Back to Top]1. INTRODUCTION
Public Law (P.L.) 94-171, enacted in 1975, directs the U.S. Census Bureau to make special preparations to provide redistricting data needed by the 50 states. It specifies that within a year following Census Day (by April 1, 2001), the Census Bureau must send the governor and legislature in each state the data they need to redraw districts for the United States Congress and state legislature. The objective of the Census 2000 Redistricting Data Program was to produce the data that the Census Bureau provides to states to meet the requirements of P.L. 94-171.
To meet this legal requirement, the Census Bureau set up a program that affords state officials an opportunity before each decennial census to define the small areas for which they wish to receive census population totals for redistricting purposes. Officials then could receive data for voting districts (e.g., election precincts, wards, state house and senate districts) in addition to standard census geographic areas, such as counties, cities, census tracts, and blocks. State participation in defining areas is voluntary and nonpartisan.
[Back to Top]2. GETTING STARTED
The CD-ROM automatically displays the control panel when you place it in your CD-ROM reader. If it does not start automatically, double-click the CD-ROM icon displayed under My Computer on the Windows Desktop.
The control panel offers the following selections:
1 To find the ASCII files on the CD-ROM, click Explore This CD, open the Data folder, then open the ASCII_Files folder. The contents of the three compressed files (ssgeo.upl.zip, ss00001.upl.zip, and ss00002.upl.zip) are described in the Technical Documentation. The corresponding database files located in the Data folder are ssgeo.dbf, ss00001.dbf, and ss00002.dbf. Note that "ss" represents the state code.
[Back to Top]3. STATES ON MORE THAN ONE DISC
Several States span two or more discs due to their numbers of geographic summaries. These include California, Florida, Illinois, New York, Pennsylvania, and Texas. Of these, Texas spans three discs and the remaining States each spans two discs. Each of these discs contains all of the higher-level geographic summaries in the State, but only contains sub-county summaries for specified counties.
For example, California (A-O) contains all higher-level geographic summaries in the State, including a summary for each county. However, it only contains sub-county summaries for counties in the A-O alphabetic range. California (A-O) contains census tract and block data for Los Angeles County, but not San Francisco County. The sub-county summaries for San Francisco County are on California (P-Z).
Sub-county geography includes block, block group, census tract, county subdivision, place/remainder (part), and voting district summaries.
[Back to Top]4. USING THE DATA BROWSER
To begin using the Data Browser software, click Launch on the control panel.
The Data Browser has three windows: main, detail, and copy.
The following series of screens guides you through a procedure to:
[Back to Top]4.1. Select Geographic Area
The main window opens immediately after you click Launch on the control panel. It presents a list of the available geographic areas under the Select Geographic Area tab.
The Geographic Areas menu will guide you through the geographic selection hierarchy as needed, depending on the type of area selected.
Double-click County (totals) to display the Geographic Comparison Table.
[Back to Top]4.2. Geographic Comparison Table
The following screen shows the Geographic Comparison Table for County (totals) in the selected State.
[Back to Top]4.3. More Detail
To display more detail for a particular line in the Geographic Comparison Table, double-click that line or highlight it and click the More Detail button.
This action opens the detail window.
[Back to Top]4.4. Quick Table
The initial display in the detail window is the Quick Table profile of the selected county.
The format of the Quick Table is comparable to that found in the American FactFinder.
[Back to Top]4.5. Detailed Tables
Click the Detailed Tables tab to display the four detailed tables (PL1 - PL4) for the selected county.
[Back to Top]4.6. Geographic Identifiers
Click the Geographic Identifiers tab.
To return to the main window, click the Close button.
[Back to Top]4.7. Copy Data to an Output File
To open the copy window, click the Copy button in the main window.
Select data items from Items available to copy and click the Select button. These items appear under Number of items selected.
Check the Include record layout... box to create a documentation file.
Click OK to finish.
After you click OK, use Save As to specify the characteristics of the output file.
These characteristics include file name, path, and type.
[Back to Top]5. MORE ABOUT THE DATA FILES
|Database File in \Data\||Zipped ASCII File in \Data\ASCII_Files\||Contents of the File|
|ssgeo.dbf||ssgeo.upl.zip (ssgeo.upl when uncompressed)||Geographic identifiers|
|ss00001.dbf||ss00001.upl.zip (ss00001.upl when uncompressed)||Tables PL1 and PL2|
|ss00002.dbf||ss00002.upl.zip (ss00002.upl when uncompressed)||Tables PL3 and PL4|
The zipped ASCII geographic identifier file (ssgeo.upl.zip) contains fixed ASCII fields described in the Data Dictionary (pdf) of the Census 2000 Redistricting Data (Public Law 94-171) Summary File Technical Documentation. The zipped data files (ss00001.upl.zip and ss00002.upl.zip) contain comma-delimited ASCII files.
The database files are FoxPro DBFs tested for compatibility with Microsoft FoxProTM 3.x and higher, dBaseTM 7.x, Microsoft AccessTM 97 and Microsoft ExcelTM 97. All numeric fields in the database files are stored as "integer" (long integer binary numbers). Tips on using these files with Access and Excel are as follow:
[Back to Top]6. QUESTIONS AND ANSWERS
[Back to Top]7. SOFTWARE UPDATE
Download Version 1.04 (March 2001, 392KB) This changes the "ASCII" file type for "Copy" from space-delimited to fixed-field format. "ASCII delimited" remains comma-delimited as in earlier versions.
To install the new module, simply download the replacement file into your c:\Program Files\cdpl94_171 folder. Please note that you must have already completed a full installation from your CD-ROM.
Version 1.03 corrected for the truncation of very long area names in printed tables.