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The Census GSS Initiative:Expanded Partnerships Leading to Improved Data Quality
Kevin Holmes
Geographer
US Census Bureau
2014 Ohio GIS ConferenceSeptember 22 - 24, 2014 | Hyatt Regency Columbus| Columbus, Ohio
The MAF/TIGER Database (MTDB)
Master Address File (MAF) Topologically Integrated Geographic Encoding
and Referencing (TIGER) Developed to support 1990 Census
Digitized from USGS quads
Supporting Current/Future Censuses & Surveys
Geographic Support System Initiative (GSS-I) Integrated program utilizing partnerships for:
Improved address coverage Continual spatial feature updates Enhanced quality assessment & measurement (QI)
May allow for a targeted address canvassing operation in 2019 (cost avoidance)
Better quality throughout the decade to support intercensal surveys (American Community Survey)
http://www.census.gov/geo/www/gss/
4
GSS-I Partnership Progress
2011• Program Definition• Formation of GSS-I
Working Groups
2012• Working Group
recommendations • Established Integrated
Project Teams (IPT)• 1st Address Summit• Developed system for
acquiring, tracking, and evaluating partner files
• Began QI development
2013• Partner file acquisition,
evaluation, and MAF/TIGER update begins
• Began Community TIGER development
• Second Address Summit• Statistical model
development begins
5
GSS-I Partnership Progress
Partner file acquisition, evaluation, and MAF/TIGER update continues
Feedback development & disbursement Conflation development Developed qualitative change detection methodology Further Community TIGER development Refined QIs Refined statistical models Address Canvassing Recommendation
2014
6
GSS-I Partner Data Acquisition
Data as of May 5, 2014
Partners Contacted
Partners Providing Files
Address List
Acquired
Structure Coordinates
Acquired
Street Centerlines
Acquired
Partner Files Processed
TOTAL 434 304 181 648 714* 996**
* Some counties provided multiple partial-coverage street centerline datasets (i.e., cities vs. balance of county)
** Includes feature and address files processed through the MAF/TIGER system update process
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A. In order to perform a match to existing MAF addresses, the submitted record must include: • Complete Address Number • Complete Street Name
and AT LEAST ONE OF THE FOLLOWING: • Address Coordinate • ZIP Code • Postal City and State • Census 2010 Tabulation State, County, Tract and Block Code
Minimum Address Guidelines: Address Matching
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B. In order to update the location (geocode) for an existing MAF address, the submitted record must meet the requirements of “A” above, and either:
• Address Coordinate or • Census 2010 Tabulation State, County, Tract and Block Code
C. In order to ADD new records to the MAF, the submitted record must meet the requirements of “A” and “B” above, and must include an Address Feature Type indicator identifying the address as
residential, commercial, utility, etc.
Minimum Address Guidelines: Address Geocoding/Adding
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Minimum Address Guidelines: Etc.
D. Within Structure Identifiers (Apt 3, etc). If not available:• # of units • Multi-unit structure flag
E. Group Quarters:• NAME (i.e. Shady Acres Retirement Home)
• TYPE (i.e. Hospital, Prison, College Dormitory)
F. Cannot process only Non-City-Style Addresses, such as: • Rural Route Addresses (i.e. RR 3 Box 725 Anytown, NC 28999) • Post Office Box Addresses (i.e. P.O. Box 12374 Anytown, NC 28999) • General Delivery (i.e. General Delivery Anytown, NC 28999) • Location Descriptions (i.e. Brick House at intersection of 1st and Main
Streets)
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Of 34,884,631 MatchedPartner Addresses…
(32,589,844)
(1,782,125)
(492, 573)
(15,685,628)
(681,243)
(18,517,760)
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Street Centerline Updates
13,601 Miles of new roads added
40,385 Miles of updated roads
53,986 total miles of feature updates- 2x Earth’s Circumference!
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GSS-I Feedback After processing completes, GSS-I partner receives:
“Thank You” letter Detailed Feedback Report GSS-I Summary Address Report
RO and WAH geographers in the initial review of the GSS-I feedback products
Total partners provided feedback to date: Addresses: 139 (15%) Centerlines: 91 (14%)
GSS-I Address Feedback: Reports Figure 1. Detailed Feedback Report Sample for Florence Co South Carolina
(A)State
(B)County
(C)Tract
(D)Block
(E)GEOID
(F)Total
Addresses
(G)Total
Residential
(H)Total
Nonresidential
(I)Total Other
(J)Total
Matched
(K)Total
Added
(L)Total
Coordinates Added
(M)Total Not Accepted
(N)Total Not Accepted Duplicate
(O)Total Not Accepted
Incomplete
(P)Total Not Accepted
Other
(Q)Total
Currently in MAF
45 041 1.01 1000 450410001011000 5 0 1 4 4 0 3 1 0 0 1 0
45 041 1.01 1001 450410001011001 8 0 0 8 5 0 0 3 0 0 3 1
45 041 1.01 1002 450410001011002 21 1 0 20 10 0 10 11 1 0 10 2
45 041 1.01 1003 450410001011003 0 0 0 0 0 0 0 0 0 0 0 0
45 041 1.01 1004 450410001011004 0 0 0 0 0 0 0 0 0 0 0 0
45 041 1.01 1005 450410001011005 89 19 2 68 38 0 28 51 0 3 48 38
Figure 2. Summary Address Report Sample for Florence Co South Carolina
Column Address Data Submitted to the Census Bureau TotalF Total Addresses 64,929 G Total Residential Addresses 51,852H Total Nonresidential Addresses 277I Total Other 12,800 Address Actions taken by the Census Bureau J Total Matched 51,002K Total Added 24L Total Coordinates Added 44,953M Total Not Accepted 13,866N Total Not Accepted Duplicate 1,389O Total Not Accepted Incomplete 537P Total Not Accepted Other 11,940Q Total Currently in MAF 61,500
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What’s Next?2015
• Continue partner file acquisition and MAF/TIGER update using partner data
• Automated partner feedback • Enhance conflation processes• Enhance change detection methodologies• Integrate Community TIGER into MAF/TIGER update • Communicate address canvassing recommendation• Research on data improvements for Puerto Rico and
Group Quarters• Transaction based partner file acquisition and evaluation
environment
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Community TIGER
Proof of Concept collaborative project with ESRI Web (cloud) based data exchange and data management portal Phased and iterative project Leverages COTS technology, existing systems and proven
workflows Utilizes and builds upon the next generation ESRI Community
Maps Local govt. GSS-I Phase 2 beta testers
Geographic Products
TIGERWEB – WMS & REST map services
Cartographic Boundary Files
TIGER/Line Shapefiles & Geodatabases w/ Demographic Data
TIGER Geodatabases
TIGER/Line Shapefiles
KML Prototype Files
Full detail, extensive attributes, current vintages
Generalized detail, limited attributes, limited vintages
Generalized detail, limited attributes, limited vintages
Detailed, extensive attributes, current vintages
Full detail, limited attributes, current vintages
Full detail, limited attributes, limited vintages
NEW
8/19/14
ACS 5-Year Decennial
High School Graduates (or more) by tract, Philadelphia, PA
Foreign Born by County, Nation
Other Data/Mapping Resources - Census Explorer -
http://www.census.gov/censusexplorer/
Thank You
http://www.census.gov/geo/www/gss/
2014 Ohio GIS ConferenceSeptember 22 - 24, 2014 | Hyatt Regency Columbus| Columbus, Ohio