New York City Census FactFinder New York City’s Census Data Aggregation Tool TM Erica Maurer POPULATION DIVISION
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New York City Census FactFinderNew York City’s Census Data Aggregation Tool
TM
Erica Maurer
POPULATION DIVISION
1. Background
a. Decennial Census vs. American Community Survey
b. Census Tracts and Neighborhood Tabulation Areas
2. New York City Census FactFinder
a. How it works
b. Key benefits
c. Future of CFF
3. Live demonstration of NYC Census FactFinder
Outline
2010 Census and ACS
• 2010 Census was a “short form” census ONLY, focusing on counting the U.S. population for congressional apportionment and legislative redistricting. Questions on age, sex, race, Hispanic origin, relationship to head, & housing tenure
• The socioeconomic data are now collected in the ACS
ACS Variables
**Computer Ownership & Internet Access – New for 2013
The ACS Sample - reliability
• ACS samples 3.5 million addresses each year – 2.2 million final interviews
• As a result, the ACS needs to combine data from multiple years to produce reliable numbers for small geographic areas
• ACS publishes Margins of Error (MOEs) to let users know how reliable estimates are
Example:Income of $60,000has MoE of $5,000Could be as high as $65,000Could be as low as $55,000
What are acceptable levels of relative reliability when using ACS estimates?
Remember:Income of $60,000with CV of 20 percenthas MoE of +/-$20,000
“CVs of 10-12 percent or less are often accepted as a reasonable standard of precision for an estimate.”
– Using the American Community Survey: Benefits and Challenges, 2007
“While there is no hard-and-fast rule, for the purposes of this handbook, estimates with CVs of more than 15 percent are considered cause for caution when interpreting patterns in the data.”
– Census Bureau’s ACS Compass Handbook Series, 2009
© 2012 Population Reference Bureau. All rights reserved. www.prb.org
Reliability of ACS Poverty DataAcross Tracts of Varying Size
PRB | INFORM, EMPOWER, ADVANCE
0
10
20
30
40
Demographic & SocialVariables
Economic Variables Housing Variables
Census Tracts
Neighborhoods
Median Overall Coefficients of Variation for
Bronx Census Tracts and Neighborhoods, 2001-2005 ACSC
oef
fici
en
t o
f V
aria
tio
n
2.81 3.19 3.02
21.6
10.9
32.9
8.4
26.8
7.7
Ratio of Tract CV toNeighborhood CV =
E New York
Canarsie
Great Kills
St Albans
Bay Rdg
S Ozone Pk
Rosedale
Steinway
Flatlands
Queens Vlg
Forest Hls
Bellerose
Jamaica
Whitestone
Hunts Pt
Astoria
Middle Vlg
Westerleigh
Flatbush
Murray Hl
College Pt
Arden Hts
Borough Pk
Flushing
Baisley Pk
Ridgewood
Hollis
Jackson Hts
Laurelton
S Jamaica
Crown Hts N
W Vlg
BedfordRichmond Hl
Maspeth
Elmhurst
Midwood
Co-Op City
Glendale
Dyker Hts
Greenpoint
Madison
Bensonhurst W
E Flushing
Woodhaven
Gravesend
Auburndale
Brownsville
Kew Gdns Hls
E Hrlm N
Woodside
Cambria Hts
Ozone Pk
Clinton
Rego Pk
Corona
E Vlg
Ocean Hl
Clinton HlStuyvesant Hts
Kew Gdns
E Hrlm S
N Corona
E Elmhurst
Pelham Pkwy
Springfield Gdns N
Crown Hts S
BaysideBayside Hls
RossvilleWoodrow
Far RckwyBayswater
LindenwoodHoward Bch
StapletonRosebank
SeagateConey Is
N SideS Side
New DorpMidland Bch
Pk SlopeGowanus
OakwoodOakwood Bch
E FlatbushFarragut
WoodlawnWakefield
Jamaica EstsHolliswood
New BrightonSilver Lake
Mott HavenPrt Morris
RugbyRemsen Vlg
BriarwoodJamaica Hls
Springfield Gdns SBrookville
AllertonPelham Gdns
Fresh MdwsUtopia
Prospect Lffrts GdnsWingate
CharlestonRichmond Vly
Tottenville
Hunters PtSunnyside
W Maspeth
SchuylervilleThrogs Nck
Edgewater Pk
Old TownDongan Hls
S Bch
Douglas MnrDouglastonLittle Nck
Ft TottenBay TerClearvw
N RiverdaleFieldstonRiverdale
Sheepshead BayGerritsen Bch
MN Bch
PomonokFlushing Hts
Hillcrest
New SpringvilleBloomfield
Travis
Todt HlEmerson HlHeartlnd VlgLghthouse Hl
AnnadaleHuguenot
Prince's BayEltingvl
Mariner's HbrArlingtonPrt Ivory
Graniteville
Sunset Pk W
Oakland Gdns
Homecrest
E Williamsburg
Bensonhurst E
Upper W Side
Sunset Pk E
Bath Bch
Wash Hts S
Wash Hts N
E Tremont
Lower E Side
Queensboro Hl
Erasmus
Ft Greene
Yorkville
Mt Hope
Norwood
Lincoln Sq
Belmont
V Cortlandt Vlg
Bronxdale
Rikers Island
Old Astoria
Brighton Bch
Chinatown
Ocean Pkwy S
Hamilton Hts
Morningside Hts
Windsor Ter
Central Hrlm S
Longwood
Parkchstr
Williamsburg
Kingsbridge Hts
Prospect Hts
W Brighton
Gramercy
Manhattanville
Fordhm S
DUMBOVinegar Hl
Dwntwn BKBoerum Hl
Starrett City
E New York (PA Ave)
WillmsbridgeOlinville
MidtownMidtown S
Cypress HlsCity Line
WestchstrUnionprt
ElmhurstMaspeth
E ConcConc Vlg
ClarmntBathgate
W FarmsBronx Riv
Upper E SideCarnegie Hl
Turtle BayE Midtown
University HtsMorris Hts
Spuyten DuyvilKingsbridge
MorrisaniaMelrose
Bedfrd PkFordhm N
Marble HlInwood
SoundviewBruckner
Murray HlKips Bay
Lenox HlRoosevelt Is
KensingtonOcean Pkwy
Battery Pk CityLower MN
Melrose SMott Haven N
BK HtsCobble Hl
Stuy TownCooper Vlg
EastchstrEdnwldBaychstr
Carroll GdnsColumbia St
Red Hook
Grymes HlCliftonFox Hls
Glen OaksFloral Pk
New Hyde Pk
W New BrightonNew Brighton
St George
Van NestMorris Pk
Westchtr Sq
GrasmereArrochar
Ft Wadsworth
Pelham BayCountry Club
City Island
QueensbridgeRavenswood
LIC
HammelsArverne
Edgemere
SoundviewCastle HlClason Pt
Harding Pk
Breezy PtBelle HbrRckwy Pk
Broad Channel
Hudson YrdsChelseaFlat IronUnion Sq
SoHoTriBeCaCivic Ctr
Little Italy
GrgtwnMarine PkBergen BchMill Basin
Neighborhood Tabulation Areas (NTAs)
New York City
Neighborhood Tabulation Areas or NTAs, are
aggregations of census tracts that are subsets of
New York City's 55 Public Use Microdata Areas
(PUMAs). Primarily due to these constraints,
NTA boundaries and their associated names may
not definitively represent neighborhoods.
LAGUARDIAAIRPORT
JOHN F. KENNEDYINTERNATIONAL AIRPORT
Bronx
Queens
Manhattan
Brooklyn
Staten
Island
West Village
NTAs are composed
of Census Tracts
NTAs
NYC Count = 188
Median Population = 36,600
Median # HUs = 15,100
Source: U.S. Census Bureau, American Community Survey, 2006-2010 Summary File
Population Division-New York City Department of City Planning
Coefficients of Variation (CV) for Population Living Below Poverty
New York City Census Tracts & Neighborhoods (NTAs), 2008-2012
Source: U.S. Census Bureau, 2008-2012 American Community Survey-Summary FilePopulation Division-New York City Department of City Planning
CV<20%20.1% of all tracts
N=2,168
CV<20%94.7% of all NTAs
N=188
New York CityCensus FactFinder
Selected Census Tracts: Manhattan 169, 173, 175, 179
Selected Census Tracts: Manhattan 169, 173, 175, 179
Key Benefits &Looking to the Future
1. Aggregate statistics on the fly for custom study areas
2. Clearly addresses issues of ACS data reliability
3. New York City specific
4. One of a kind
Key Benefits to NYC Census FactFinder
1. Annual data update and expanded content
2. Targeted visualizations?
3. Longitudinal socioeconomics?
Looking to the Future
Web Link and Feedback
• New York City Census FactFinder:
www.nyc.gov/cff
• NYC Census Factfinder Feedback email address:
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