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Census Geographic Programs. Cathy Friedenreich Geographic Coordinator Charlotte Regional Census Center. Census Geographic Programs. MAF/TIGER Accuracy Improvement Project (MTAIP) Local Update of Census Addresses Program (LUCA) Participant Statistical Areas Program (PSAP)

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census geographic programs

Census Geographic Programs

Cathy Friedenreich

Geographic Coordinator

Charlotte Regional Census Center

census geographic programs1
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)
major sources of census data

Major Sources of Census Data

Two Objectives of Census Geography Programs

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.
maf tiger database mtdb

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

maf tiger accuracy improvement project mtaip

Sources

MAF/TIGER Accuracy Improvement Project (MTAIP)

TIGER Updates

  • 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

Accurate road centerline and other layers

Sources created by contractor

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

Geographic Areas in TIGER/Line Shapefiles

slide10

pp

Block boundaries

From realigned TIGER

public products

TIGER/Line – 1989 to 2006

Public Products

TIGER/Line Shapefiles

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

Up to 60 layers, current and 2000 geography

road features in tiger line shapefiles

Road features in TIGER/LINE Shapefiles

Generally consistent nationwide road centerline

Free download from www.census.gov

(Follow the TIGER links or go directly to

http://www.census.gov/geo/www/tiger/index.html)

slide15

2010 CENSUS

Local Update of Census Addresses

(LUCA)

slide17

Next Steps

  • Census Bureau processes updates – Feb-Aug 2008
  • Address Canvassing Operation - Spring/Summer 2009
2010 census luca schedule feedback and appeals
2010 Census LUCA Schedule – Feedback and Appeals
  • Feedback materials sent
    • Option 1 & 2 - Updated Address List, Address Count List, Census Maps
    • Option 3 - Updated Address Count List and Maps
  • Discrepancies appealed
  • All Title 13 U.S.C. materials including copies returned or destroyed
participant statistical areas program

Participants review and update

Participant Statistical Areas Program

Census tracts

Block groups

Census designated places (CDPs)

Census county divisions (CCDs) (selected states) (not NC)

participant statistical areas program2

Census Tract Characteristics

Participant Statistical Areas Program

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

participant statistical areas program3

Census Tract Characteristics

Participant Statistical Areas Program

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)

participant statistical areas program4

Census Tract Criteria Changes for 2010

Participant Statistical Areas Program

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

participant statistical areas program5

Census Tract Revisions

Participant Statistical Areas Program

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

participant statistical areas program7

Block Group Characteristics

Participant Statistical Areas Program

Divisions of census tracts defined for the tabulation of census data

Form the framework for block numbering

participant statistical areas program9

Block Group Characteristics

Participant Statistical Areas Program

Smallest geographic areas

For sample data from Census 2000

For data from the American Community Survey

participant statistical areas program10

Block Group Characteristics

Participant Statistical Areas Program

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

participant statistical areas program11

Block Group Criteria Changes

Participant Statistical Areas Program

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

participant statistical areas program12

Block Group Revisions

Participant Statistical Areas Program

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

participant statistical areas program14

Census Designated Place Characteristics

Participant Statistical Areas Program

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

participant statistical areas program15

Census Designated Place Characteristics

Participant Statistical Areas Program

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

participant statistical areas program16

CDP Criteria Changes

Participant Statistical Areas Program

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

participant statistical areas program18

Participant Statistical Areas Program

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

participant statistical areas program19

Participant Statistical Areas Program

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

participant statistical areas program20

Participant Statistical Areas Program

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
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)
american indian areas for the 2010 census
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)
boundary and annexation survey bas
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
boundary and annexation survey bas1
Boundary and Annexation Survey (BAS)
  • 2008 BAS
    • May 31, 2008 Survey packages received by this date will be included in the 2009 BAS materials
boundary and annexation survey bas2
Boundary and Annexation Survey (BAS)

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)

boundary and annexation survey bas3
Boundary and Annexation Survey (BAS)

2010 BAS

  • Similar cycle to 2009 BAS
  • January 1, 2010 = Boundary reference date for the 2010 Census
  • Last BAS for 2010 Census
census day april 1 2010

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 theseopportunities, 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

questions

Questions?

Cathy Friedenreich

Geographic Coordinator

U.S. Census Bureau

3701 Arco Corporate Drive, Suite 250

Charlotte, NC 28273

catherine.j.friedenreich@census.gov

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

Fax: 704-909-6714