Census Geographic Programs Cathy Friedenreich Geographic Coordinator Charlotte Regional Census Center 1

Census Geographic Programs

Cathy FriedenreichGeographic Coordinator

Charlotte Regional Census Center

1

Census Geographic Programs• MAF/TIGER Accuracy Improvement Project

(MTAIP)• Local Update of Census Addresses Program

(LUCA)• Participant Statistical Areas Program (PSAP)• Redistricting Data Program• Tribal Programs• Boundary and Annexation Survey (BAS)

2

http://www.census.gov/2010census/

3

Major Sources of Census Data

• 2010 Census – A very short form for basic data

• American Community Survey (ACS) - Sample data

• Estimates Program and other data programs

~ All of these data are tied to geography ~

• To support the collection of data that are as complete and accurate as possible

• To provide useful, current geographic areas for data tabulations.

Two Objectives of Census Geography Programs

4

MAF/TIGER Database (MTDB)

• MAF – Master Address File

Census address list – used to distribute

questionnaires

• TIGER – Topologically Integrated Geographic Encoding and Referencing

Geographic data

~ Base map features

~ Address ranges and ZIP codes

~ Geographic areas

5

MAF/TIGER Accuracy Improvement Project (MTAIP)

• Accurate road centerline and other layers• Sources created by contractor

Sources

• Realign matching features in TIGER• Add features missing from TIGER• Rubber sheet features not in a source• Copy attributes where missing from TIGER• Harvest attributes for existing TIGER features

TIGER Updates

6

7

Source centerline

2000 Census TIGER/Line features and MTAIP Source centerline

8

Geographic Areas in TIGER/Line Shapefiles

When linear features are realigned, boundaries following those features also are realigned

Thus shapefiles for census tracts, census blocks, and other geographic areas are more accurate and generally will line up with positionally accurate local layers

9

Local centerlines and streams

overlaid on block boundaries from

Census 2000 TIGER/Line file

10

Block boundaries

From realigned TIGER

pp

11

2000 Census TIGER/Line features and 2007 TIGER/Line Shapefile features

12

Pitt

Wake

Hyde

Duplin

Bladen

Bertie

Pender

Wilkes

Beaufort

Moore

Onslow

Union

Halifax

Craven

Robeson

Nash

Surry

Sampson

Iredell

Columbus

Swain

Burke

Carteret

Johnston

Brunswick

Ashe

Guilford

Anson

Randolph

Harnett Wayne

Jones

Chatham

Macon

Rowan

Hoke

Martin Tyrrell Dare

Lee

Stokes

StanlyLenoir

Franklin

Warren

Buncombe

Davidson

Jackson

Haywood

GatesPerson

Caldwell

Wilson

Forsyth

Caswell

Polk

Orange

Cumberland

Madison

Rutherford

Pamlico

Yadkin

Gaston

ClayCherokee

Cleveland

Catawba

Davie

Rockingham

McDowell

HertfordVance

Avery

Lincoln

Yancey

Northampton

Edgecombe

CabarrusGraham

Greene

Watauga

Washington

Granville

Richmond

Alamance

Mecklenburg

Montgom

ery

Durham

Scotland

Currituck

Henderson

Camden

Transylvania

Mitchell Alex-

ander

Alleghany

Chowan

Perqui-mans

Pasquotank

New

Hanover

TIGER Enhancement Status for North Carolina

Legend

Enhanced features in 2007 TIGER/Line Shapefiles

Enhanced features in 2008 TIGER/Line Shapefiles (available October 2008)

13

Public Products

Census-developed format – must be converted for use in GIS

TIGER/Line – 1989 to 2006

Up to 60 layers, current and 2000 geography

TIGER/Line Shapefiles

14

Road features in TIGER/LINE Shapefiles

• Generally consistent nationwide road centerline

• Free download from www.census.gov(Follow the TIGER links or go directly tohttp://www.census.gov/geo/www/tiger/

index.html)

15

2010 CENSUS2010 CENSUS

Local Update of Census AddressesLocal Update of Census Addresses

(LUCA)(LUCA)

16

What’s Next?What’s Next?

17

Next StepsNext Steps

1. Census Bureau processes updates – Feb-Aug 2008

2. Address Canvassing Operation - Spring/Summer 2009

18

2010 Census LUCA Schedule – 2010 Census LUCA Schedule – Feedback and AppealsFeedback and Appeals

1. Feedback materials sentOption 1 & 2 - Updated Address List, Address Count List, Census MapsOption 3 - Updated Address Count List and Maps

2. Discrepancies appealed 3. All Title 13 U.S.C. materials including copies returned

or destroyed

19

Participant Statistical Areas Program

• Census tracts• Block groups• Census designated places (CDPs)• Census county divisions (CCDs)

(selected states) (not NC)

Participants review and update

20


Census Tracts

21


• Relatively permanent • Small-area divisions of counties defined for

the tabulation of census data• The primary goal:

• to provide a set of nationally consistent • small, statistical geographic units• with stable boundaries• that facilitate analysis of data across time

Census Tract Characteristics

22


• Compact and contiguous land areas• Visible and identifiable features• Optimum population size of 4,000 • Census tract numbers contain 1 to 4 digits

and possibly a 2-digit suffix (e.g. 301.01)

Census Tract Characteristics

23


• Minimum population threshold for most tracts is lowered to 1,200

• Housing unit counts may be used • (480 housing unit minimum)

• All types of populated tracts must meet the same thresholds

• Special tracts may be created• large special land use areas without housing units or

population

Census Tract Criteria Changes for 2010

24


Should be limited to:• Splits

• Split census tracts with large populations (e.g. census tracts that had a 2000 census population above 8,000)

• Mergers• Merge census tracts with small populations (e. g. census

tracts that had a 2000 census population below 1,200)

• Boundary adjustments• Adjust boundaries where necessary to follow acceptable,

visible features

Census Tract Revisions

25

26

27


Block Groups

28


• Divisions of census tracts defined for the tabulation of census data

• Form the framework for block numbering

Block Group Characteristics

29


30


• Smallest geographic areas • For sample data from Census 2000• For data from the American Community

Survey


31


• Reasonably compact and contiguous land areas

• Boundaries should follow visible and identifiable features

• Population range is 600 to 3,000• Block group numbers are unique within

census tract and range from 1 to 9


32


• Housing units counts may be used to meet block group thresholds (240 housing unit minimum)

• All types of populated block groups must meet the same threshold

• Special BGs may be created for large special land use areas without housing units or population

Block Group Criteria Changes

33


• Stability over time is not a requirement • Block groups should be revised to meet

population/housing unit thresholds• Boundary adjustments – Adjust boundaries

where necessary to follow acceptable, visible features

Block Group Revisions

34


Census Designated Places (CDPs)

35


• Closely settled, unincorporated communities that are locally recognized and identified by name

• Generally contain a mix of residential and commercial uses similar to that of an incorporated place of similar size

• Consist of contiguous territory

Census Designated Place Characteristics

36


• Boundaries should follow visible features or nonvisible state, county, or incorporated place boundaries

• CDPs cannot cross state lines but may be in more than one county

Census Designated Place Characteristics

37


• For 2010, boundaries may follow nonvisible features in selected circumstances

• Population threshold requirements were eliminated for Census 2000, but for 2010, a CDP cannot have zero population and zero housing units

• A CDP must represent a single, distinct community

CDP Criteria Changes

38


PSAP Review and Update

39


• Participants are being identified now• Local participants will coordinate review for

whole counties or groups of counties• Review of areas begins in later this year

40


Participants will: • Receive the review materials – Fall 2008• Make interested persons aware that the

opportunity exists to review and update participant statistical areas

• Submit proposed revisions and updates to the Census Bureau – Fall 2008/Spring 2009

• Negotiate revisions to make sure they meet Census Bureau standards

41


• Review will use census shapefiles – no paper maps

• Participants must use MAF/TIGER Partnership Software (MTPS)

• Must provide output in specified format• Census will post maps showing proposed

revisions on an internet site for easy viewing and discussion

Redistricting Data Program

• Phase 1 - State Legislative District Project

• Phase 2 - Voting District/Block Boundary Suggestion Project

(through spring 2009)

• Phase 3 - Delivery of the 2010 Census P.L. 94-171 Redistricting

Data Files and Geographic Products (nlt April 1, 2011)

• Phase 4 - Collection of Post-2010 Census Redistricting Plans

(2012 – 2013)

• Phase 5 - Evaluation of the 2010 Census Redistricting Data

Program and Recommendations for 2020 (2012-2014)

42

American Indian Areas for the 2010 Census

• American Indian reservations (AIRs) and Off-reservation trust lands (ORTLs)– Tribal designated statistical areas (TDSAs)– Tribal census tracts (tribal tracts) and block groups– Tribal subdivisions – Census designated places

• State designated tribal statistical areas (SDTSAs)

43

Boundary and Annexation Survey (BAS)

Variety of Ways to Respond:• Paper BAS• MAF/TIGER Partnership Software (MTPS)• Digital BAS• Web-BAS (future)• E-BAS (forms)• Submitting a No Change Response

44


• 2008 BAS– May 31, 2008 Survey packages

received by this date will be included in the 2009 BAS materials

45


2009 BAS– September 2008 Advance letter (by fax / email / mail) will ask if there are

changes to report and the response method the local or tribal governments

prefers

– February 2009 BAS packages mailed out

– April 1, 2009 Survey packages received by this date will be included in the

Population Estimates Program and the American Community Survey

– May 31, 2009 Survey packages received by this date will be included in the

2010 BAS materials

(dates are approximate)

46

http://www.census.gov/popest/estimates.php

http://www.census.gov/acs/www/


2010 BAS

• Similar cycle to 2009 BAS• January 1, 2010 = Boundary reference date

for the 2010 Census• Last BAS for 2010 Census

47

48

Census Day: April 1, 2010• Census geography programs offer

opportunities for local, regional, state and tribal participants to have a positive impact on the census for their areas

• We encourage you to take advantage of these opportunities, if appropriate, and to encourage other regional and local agencies to participate as well

• Active participation in census geography programs will help to create a better census and better data products for your areas

50

Questions?

Cathy Friedenreich

Geographic Coordinator

U.S. Census Bureau

3701 Arco Corporate Drive, Suite 250

Charlotte, NC 28273

[email protected]

704-936-4200 (1-866-511-5822)

Fax: 704-909-6714

Documents

Census Geographic Programs Cathy Friedenreich Geographic Coordinator Charlotte Regional Census Center 1