Census 2000: The Redistricting Summary Data (Public Law 94-171)

Census 2000:Census 2000: The Redistricting Summary Data

(Public Law 94-171)

Redistricting Data Program

• Public Law 94-171 enacted in 1975

• Outgrowth of 1960’s court decisions on “One-Person/One-Vote” and 1965 Voting Rights Act

• State legislatures can receive data according to local definitions to ease planning new district boundaries

• First look at racial/ethnic profile of local community

Data Items Included

– Total Population

– Hispanic/Latino Origin

– Race

– Voting Age Population

Public Law 1 (PL1) Data Table: Race

Public Law 2 (PL2) Data Table: Hispanic or Latino, and Not Hispanic or Latino by Race

Public Law 3 (PL3) Data Table: Race for the Population 18 Years and Over

Public Law 4 (PL4) Data Table: Hispanic or Latino, and Not Hispanic or Latino by Race for the

Population 18 Years and Over

Office of Management and Budget Race Categories

• American Indian or Alaska Native• Asian• Black or African American• Native Hawaiian or Other Pacific

Islander• White• Some other Race-----------

• Two or More Races

Race Items of Interest

• Respondents could choose more than one category

• Total possibility of 63 racial categories• Hispanic/Latino origin cross-tabulation

equals 126 possible racial/ethnic categories

• In a National Content Survey on Race in 1996, 1.2% reported multiracial

• In 1998 Dress Rehearsal, 5.4% of Sacramento, Ca. respondents were of multiple races

Maximum Combination of Six Racial Categories

6 racial categories

+57 combinations of two or more races

63 Possible combinations

“Two or More Races”

• Category where all multiple-race responses are grouped together

• This category, together with the 6 single-race alone categories, will add up to 100% of the population

• The result is that direct comparisons back to 1990 racial categories CANNOT be made

Population Data Summary Levels In Public Law 94-171 File

– Counties– County subdivisions– Places (incorporated and census

designated)– Census tracts– Census block groups– Census blocks– Voting districts*– State house and state senate districts*

* - where provided

Census Geography Overview

Data Accessibility

• Data provided to states on CD-ROM, with software to view, print, download items

• Delivered by April 1, 2001 to governor, majority/minority legislative leaders

• Census Maps /TIGER/Line files delivered to state officials prior to March 1, 2001

• P.L. 94-171 redistricting data publicly accessible on www.census.gov

Accessibility Methods

• File Transfer Protocol (FTP)– For downloading complete dataset files– Will be available at http://ftp2.census.gov

• American FactFinder– Quick Tables– Geographic Comparison Tables– Detailed Tables

• CD-ROMs• Maps, TIGER/Line

Media Type: FTP vs AFF vs CD-ROM

FTP AFF CDDifficulty High Low Low

Cost No No Yes

User Level High All All

Speed Variable Variable High

Connect Issues Possible Possible Unlikely

Download limits None 5 megs CD size

Graphical User Interface None Yes Yes

http://ftp2.census.gov

Begin by selecting the file you want to download

Then save the file down to your PC

Using your Windows Explorer open the zipped files

Use unzip software available for free at www.winzip.com or www.pkunzip.com

Geographic Comparison Tables

Quick Tables

Data Sets

Downloading Data in American FactFinder

Redistricting Summary Data CD-ROM

Census 2000Demonstration Disc 1998

This CD-ROM containssummary data files,documentation, andsoftware to displayinformation for thecity of Sacramento,California

To install:click “My Computer”,click the CD-ROM icon,then click the “Install”button and follow the instructions.

For additional informationgo to: http://tier2.census.gov/DemoDisc.htm

USCENSUSBUREAUHelping You Make Informed Decisions

Public Law 94-171 Redistricting Data

Issued December 2000

United States

2000Census

Maps and TIGER/Line

• Three map types in three formats– Census Tract Outline

• Paper (8.5” x 11”), PDF off the web, HPGL on demand

– Voting District Outline Maps• Voting district outline (no state legislative district) on

Paper, PDF off the web, and HPGL on demand

– County Block Maps• Includes voting district and legislative district

boundaries and codes• Paper, PDF off the web, and HPGL on demand

Census Tract Outline Maps

Voting district/state legislative district outline maps

County Block Maps

TIGER/Line Files

First TIGER/Line File to contain final Census 2000 tabulation geography

• Legal areas with January 1, 2000 boundaries

• Census 2000 statistical areas (tracts, CDPs)

• Voting districts/legislative districts• Tabulation census blocks

For More Information

• www.census.gov

• “Strength in Numbers: Your Guide to Census 2000 Redistricting Data From the U.S. Census Bureau” - brochure

• “What You Should Know About the Apportionment Counts” - brochure

• Customer Service Center – (301) 457-4100– webmaster@census.gov