accessing amercan community survey block group data · 2009-2013 acs 5-year to future block group...

Accessing American Community Survey

Block Group Data

Gretchen Gooding April 30, 2015

Outline American Community Survey (ACS) basics Tracts and block groups AFF Download Center Overview of ACS Summary File (ACS SF) Ways to access the ACS SF Summary File Retrieval Tool DataFerrett FTP site Other

Wrap up

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What is the ACS? An ongoing monthly survey sent to 3.5 million addresses • Data collection through four

modes: Internet, Mail, Telephone, Personal Visit

Annually produces 1-year and 5-year period datasets: • Detailed population and housing

estimates previously collected on the decennial long form

• Critical information on small areas and small population groups

• Over 11 billion estimates for over 35,000 communities

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ACS Content Social

Economic

Housing

Demographic

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Social Education Marital Status Fertility Veterans Disability Citizenship Language Migration

Employment Status Income Commuting Occupation & Industry Health Insurance Class of Worker

Economic Tenure (Own/Rent) Occupancy & Structure Home Value Costs (Mortgage, Taxes, Insurance) Utilities Plumbing/Kitchen Facilities

Housing

Sex Age Race Hispanic Origin

Demographic

Availability of ACS Data Products

Estimated Population of Geographic Area

1-Year Estimates

3-Year Estimates

5-Year Estimates

65,000 or more X X X

20,000 to 64,999 X X

Less than 20,000 X

Planned Release Date

September 2015 N/A

December 2015

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Geographic Hierarchy

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Tracts and Block Groups Block group estimates are available in the ACS

Summary File (all years) & American FactFinder (2009-2013 ACS 5-year to present)

Block groups and tracts are available only in the ACS 5-year estimates

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Kalamazoo County, MI - Census Tract 30.04

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Kalamazoo County, MI - Census Tract 30.04, Block Groups 1, 2, & 3

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TIGERweb-Map Layers

tigerweb.geo.census.gov/tigerweb/

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TIGERweb-Block Groups

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AFF Download Center

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factfinder.census.gov

2-Dataset

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3-Geographies

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4-Search Results

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Complete Instructions

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census.gov/acs/www/data_documentation/summary_file/


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What is the ACS Summary File? Set of comma-delimited text files that

contain all of the Detailed Tables Stored in a series of files on the FTP site Files contain only the data from the tables

(no information such as table title, description of the rows, etc) Data have already been tabulated for

specific geographic areas

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AFF vs. Summary File

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How to Use the ACS SF 1—Verify table is available at block group level (not all tables are published for this geography) 2—Use appropriate tool to access ACS SF Summary File Retrieval Tool DataFerrett FTP site

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Summary File Page


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Check Appendix for Table

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Summary File Retrieval Tool

Tool allows users to load tables from the ACS SF into an Excel spreadsheet Must have Excel 2007 or newer to run tool You can access all tracts and block groups

per table per state

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Summary File Page

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SF Retrieval Tool

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Step 1 of 2

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Step 2 of 2

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Results-Estimates

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Video on Using SF Retrieval Tool

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youtube.com/user/uscensusbureau

Outline American Community Survey (ACS) basics Tracts and block groups AFF Download Center Overview of ACS Summary File (ACS SF) Ways to access the ACS SF FTP site DataFerrett Summary File Retrieval Tool Other

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DataFerrett

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dataferrett.census.gov

Finding Summary Data

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Select Geographies

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Select Geographies

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Next Level-State

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Next Level-County

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Next Level-Census Tract

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Next Level-Block Group

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Step 2

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Make Table

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Results

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Summary File Organization

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www2.census.gov/acs2011_5yr/summaryfile/

File Naming

2011 5 mi 0075 000.zip 2011=reference year 5=period covered mi=state level 0075=sequence number 000=iteration ID

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Estimate file e20115mi0075000.txt

Geography file g20115mi.csv or g20115mi.txt

Margin of error file m20115mi0075000.txt

Starting and Ending Position

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1 2 3 4 5 6 7-13

Templates

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www2.census.gov/acs2011_5yr/summaryfile/UserTools/2011_Summary_FileTemplates.zip


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TIGER/Line Shapefiles Pre-joined with Demographic Data

census.gov/geo/maps-data/data/tiger-data.html

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Census API

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census.gov/developers


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Recap Tracts and block groups are only available

as 5-year estimates (not 1-year or 3-year) 2009-2013 ACS 5-year to future block

group level estimates are available in American FactFinder All years of block group level estimates

are available in the ACS Summary File You can access the ACS SF using the SF

Retrieval Tool, DataFerrett, or FTP site

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Availability of Block Groups Dataset American

FactFinder SF Retrieval Tool

DataFerrett FTP Site

2005-2009 ACS

2006-2010 ACS

2007-2011 ACS

2008-2012 ACS

2009-2013 ACS

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Continue the Conversation @uscensusbureau #ACSdata facebook.com/uscensusbureau @uscensusbureau

Source us: “U.S. Census Bureau’s American Community Survey” YYYY-YYYY American Community Survey 1/3/5-year estimates/statistics/data release 2013 American Community Survey 1-year estimates, 2009-2013 American Community Survey 5-year data release)

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Purpose: Improve understanding of the value and utility of ACS data. Promote information sharing among data users about key ACS

data issues and applications Membership is free and open to all interested ACS data

users Webinars and special sessions at professional meetings

planned Next data users conference: May 11-13, 2015 in College

Park, MD Users group website and online community

acsdatausers.org

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Contact Information

Visit the ACS/PRCS website: census.gov/acs

Contact by telephone:

1-800-923-8282

Submit a question: https://ask.census.gov

Email updates:

https://public.govdelivery.com/accounts/ USCENSUS/subscriber/new

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Questions?

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Accessing �American Community Survey �Block Group DataOutlineWhat is the ACS?ACS ContentAvailability of ACS Data ProductsOutlineGeographic HierarchyTracts and Block GroupsKalamazoo County, MI -�Census Tract 30.04Kalamazoo County, MI - Census Tract 30.04, Block Groups 1, 2, & 3TIGERweb-Map LayersTIGERweb-Block GroupsOutlineAFF Download Center2-Dataset3-Geographies4-Search ResultsComplete InstructionsOutlineWhat is the ACS Summary File?AFF vs. Summary FileHow to Use the ACS SFSummary File PageCheck Appendix for TableOutlineSummary File Retrieval ToolSummary File PageSF Retrieval ToolStep 1 of 2Step 2 of 2Results-EstimatesVideo on Using SF Retrieval ToolOutlineDataFerrettFinding Summary DataSelect GeographiesSelect GeographiesNext Level-StateNext Level-CountyNext Level-Census TractNext Level-Block GroupStep 2Make TableResultsOutlineSummary File OrganizationFile NamingSlide Number 48Starting and Ending PositionTemplatesOutlineTIGER/Line Shapefiles Pre-joined with Demographic DataCensus APIOutlineRecapAvailability of Block GroupsContinue the ConversationSlide Number 58Contact InformationQuestions?

accessing amercan community survey block group data · 2009-2013 acs 5-year to future block group...

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