finding census data using american factfinder
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Finding and Mapping Census Data
Kathleen Fear, Data LibrarianBlair Tinker, GIS Research Specialist
Part 1: Getting the data (American FactFinder)
Part 2: Mapping (ArcGIS)
http://factfinder.census.gov
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
What it’s got…• American Community
Survey• American Housing Survey• Annual Economic Surveys:
– Annual Survey of Manufactures
– Business Patterns– Nonemployer Statistics
• Annual Surveys of Governments
• Census of Governments• Commodity Flow Survey• 2000 / 2010 Decennial
Census• Economic Census• EEO Tabulation• Population Estimates
Program• Puerto Rico Community
Survey
I want to find out the percent of households with kids under 18 in
each zip code in Monroe County in 2010.
Census geographies: a brief diversion
A line connecting two geographies indicates a hierarchical relationship between them, e.g. states are comprised of counties.
The absence of a line means there is no reliable relationship between two geographies, e.g. Kansas City is in MO and KS.
Census tract: subdivisions of a county or county equivalent, optimally ~4,000 people.
Block group: subdivision of census tracts, between 600 and 3,000 people.
Census block: smallest geographical area used by the Census Bureau. Not based on population; bounded by visible boundaries (roads, rivers) and non-visible boundaries (property lines, town lines).
See http://www.census.gov/geo/reference/webatlas/ for more details.
Zip codes vs. ZCTAs
• ZCTAs only have a relationship with Nation and Census block
• Zip codes and ZCTAs are almost identical
From: Grubesic, T. H. (2008). Zip codes and spatial analysis: Problems and prospects. Socio-Economic Planning Sciences, 42(2), 129–149. http://doi.org/10.1016/j.seps.2006.09.001
From: Grubesic, T. H. (2008). Zip codes and spatial analysis: Problems and prospects. Socio-Economic Planning Sciences, 42(2), 129–149. http://doi.org/10.1016/j.seps.2006.09.001
From: Grubesic, T. H. (2008). Zip codes and spatial analysis: Problems and prospects. Socio-Economic Planning Sciences, 42(2), 129–149. http://doi.org/10.1016/j.seps.2006.09.001
I want to find out the percent of households with kids under 18 in
each zip code ZCTA in Monroe County in 2010.
“Within state”: New York
“Within county”: Monroe
“Geographic type”: ZIP Code/ZTCA
Census vs. ACS: another brief diversion
• Census products:– Summary File 1 (SF1), Summary File 2 (SF2): Short form
• Age, sex, race, Hispanic/Latino origin, households, families, housing units, owner/renter status• 100% sample
– Summary File 3 (SF3), Summary File 4 (SF4): Long form• Income, education, occupation, ancestry, disability, foreign
birth, commuting, etc.• 19 million households (about 1 in 6)
Census vs. ACS: another brief diversion
• Census products:– Summary File 1 (SF1), Summary File 2 (SF2): Short form
• Age, sex, race, Hispanic/Latino origin, households, families, housing units, owner/renter status• 100% sample
– Summary File 3 (SF3), Summary File 4 (SF4): Long form• Income, education, occupation, ancestry, disability, foreign
birth, commuting, etc.• 19 million households (about 1 in 6)
Long form eliminated in 2010
Census American Community Survey
Every 10 years Annual
Count of population Demographic survey
Snapshot of a point in time Average of characteristics over time (1, 3 or 5 years)
SF1: Data for individual census blocks
SF3 (2000): Data for block groups
5-year estimates: Data for block groups
3-year and 1-year estimates: Data for census tracks
This will embed any footnotes directly in the data
This puts footnotes in a separate file
This adds a header row with descriptive variable names
README fileAnnotations fileMetadata (variable names)The actual data!Variable-level footnotes
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