census geographic area programs and geographic products update michael ratcliffe geography division...
TRANSCRIPT
![Page 1: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/1.jpg)
Census Geographic Area Programsand Geographic Products Update
Michael Ratcliffe
Geography Division
US Census Bureau
Let’s Focus on Census Geography Workshop
GIS-T
April 11, 2010
1
![Page 2: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/2.jpg)
Public Use Microdata Areas
• Minimum population: 100,000
• Super-PUMAs will not be defined.
• Anticipate publication of proposed criteria in Federal Register, Summer 2010.
• Delineation program expected start: Spring 2011.
• SDCs will delineate PUMAs.
![Page 3: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/3.jpg)
Public Use Microdata Areas
PUMAs will be used to tabulate and present data for:
• 2010 Census Public Use Microdata Sample (PUMS) Files
• American Community Survey PUMS Files• American Community Survey 1-year data
3
![Page 4: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/4.jpg)
PUMAs follow county boundaries where possible.
May cover large land areas due to minimum population requirement.
4
![Page 5: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/5.jpg)
Counties with populations greater than 200,000 may contain multiple PUMAs.
Census tracts may be aggregated to form PUMAs.
5
![Page 6: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/6.jpg)
Traffic Analysis Zones
Two types of areas:• Traffic Analysis Zones
– Defined based on 2010 census blocks
• Traffic Analysis Districts– Aggregations of TAZs
6
![Page 7: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/7.jpg)
Traffic Analysis ZonesDraft Program Schedule
Task Start FinishAASHTO/FHWA submits short version of requirements to Census Bureau
November 2009
AASHTO/FHWA submits formal version of requirements to Census Bureau
February 2010
MAF/TIGER Partnership Software Development February 2010 February 2011
Spatial Files, MTPS, Delineation Guidelines and Documentation Distributed to MPOs
April 2011 April 2011
State DOTs and MPOs delineateTAZs and TADs
April 2011 August 2011
Census Bureau reviews and inserts TAZs into MAF/TIGER database
August 2011 November 2011
7
![Page 8: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/8.jpg)
Traffic Analysis Zones
TAZ Delineation Software:• MAF/TIGER Partnership Software will be
utilized• Block Equivalency Files• Caliper Corporation has reviewed and
commented on software requirements
Census Bureau will need a list of counties (towns in New England) associated with each MPO
8
![Page 9: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/9.jpg)
Statistical Areas Program
• Census tracts• Block groups• Census county divisions• Census designated places
• Delineated areas were entered into the MAF/TIGER data base December 2009
• Currently verifying final boundaries
![Page 10: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/10.jpg)
Statistical Areas
• No longer just for the decennial census!
• ACS will tabulate data for all statistical areas
• Economic Census data tabulated for CDPs:– 5,000 or more people– 5,000 or more workers
10
![Page 11: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/11.jpg)
11
Census Tracts and Block Group Thresholds
Census Tract Thresholds
Census 2000 2010 Census
Population Population Housing Unit
Optimum 4,000 4,000 1,600
Minimum 1,500 1,200 480
Maximum 8,000 8,000 3,200
Block Group Thresholds
Census 2000 2010 Census
Population Population Housing Unit
Optimum 1,500 --- ---
Minimum 600 600 480
Maximum 3,000 3,000 1,200
![Page 12: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/12.jpg)
TIGER/Line and Map Products
• Public TIGER/Line Shapefiles
• Reference Maps– Congressional District maps
– P.L.94-171 County Block Maps
– Census Tract Outline Maps
– Census 2010 Block Maps
• Thematic Maps– Loss and Gain of Seats in Congress by State
– Population Distribution (“Nighttime”) Map
12
![Page 13: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/13.jpg)
Geographic Relationship Files
• 2000 Tabulation Block to 2010 Collection Block
• 2000 Tabulation Block to 2010 Tabulation Block
• 2010 Current (ACS) Block to 2010 Tabulation Block
• 2010 Collection Block to 2010 Tabulation Block
• 2000 Census Tract to 2010 Census Tract
Other Potential Relationship Files?
13
![Page 14: Census Geographic Area Programs and Geographic Products Update Michael Ratcliffe Geography Division US Census Bureau Lets Focus on Census Geography Workshop](https://reader036.vdocuments.mx/reader036/viewer/2022062618/5513e8d455034674748b5808/html5/thumbnails/14.jpg)
Geographic Reference Products
• Gazetteer Files– Counties– County subdivisions– Places
• Geographic Area Inventory Lists (with population, housing units, and land area)
• Geographic Change Notes• Geographic Terms and Concepts
14