West Virginia GIS Conference June 2 June 5 2014 Anne Jeffers Geographer 1 Overview Geographic Support System Initiative GSSI Boundary and Annexation Survey Census Geographic Products ID: 438918
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US Census Bureau
West Virginia GIS ConferenceJune 2 – June 5, 2014Anne JeffersGeographer
1Slide2
Overview
Geographic Support System Initiative (GSS-I)Boundary and Annexation SurveyCensus Geographic Products2Slide3
Geographic Support System Initiative (GSS-I)
Expanded Partnerships Lead to Improved Data Quality3Slide4
Key Components of the GSS-I
An integrated program that utilizes a partnership program for:Improved address coverageAnnual, transaction-based address and spatial feature updates
Enhanced quality assessment and measurement
4
Address Updates
123 Testdata Road
Anytown, CA 94939
Lat 37 degrees, 9.6 minutes N
Lon 119 degrees, 45.1 minutes W
Street/Feature Updates
Quality MeasurementSlide5
The GSS-I Partnership Program
Launched in October 2012Opportunity for tribal, state, county, and local governments to continually share address & spatial data with the Census Bureau Recognizes local governments as a definitive authority for quality address and street data within their communities
Leverages the Census Bureau’s broad partner network to encourage participation
5Slide6
Benefits of Participation
Expanded ROI – encourages re-use of local government geospatial data investmentIncreases usage of high-quality local government data for multiple federal programs, ie
:
the 2020 Census and the USGS National
Map
Provides
maximum input into the
American Community Survey.
closes the gap between partner addresses and Census addresses for Local Update of Census Addresses (LUCA) program in 2020.
6Slide7
Targeted Canvassing in 2019?
2009 Address Canvassing100% Canvassingvs2019 Targeted Canvassing
7Slide8
What is the Basic Process?
Research and identify potential data partners.Acquire partner data and perform Content Verification to determine general usabilityCrosswalk, standardize, match, and geocode partner addresses and structure points using the Master Address File (MAF) Match street centerline data to identify differences, calculate spatial accuracy using GPS control points
Ideal Scenario: new addresses are added to the MAF, new streets are added to TIGER, address and spatial inconsistencies are resolved
8Slide9
Partner Data Acquisition and Content Verification
9Slide10
Partner Data Acquisition
Data as of February 17, 2014Partners ContactedPartners Providing
Files
Address List Acquired
Structure Coordinates Acquired
Street Centerlines Acquired
Partner Files Processed
TOTAL
375
247
164
546
615*
778**
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* 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 processSlide11
11
GSS-I Participants to DateSlide12
GSS-I Status for West Virginia (FY14)Slide13
Observations from Content Verification
Incomplete metadata – projection, datum, data dictionaries, etc.Coverage gaps – some counties excluded data for incorporated cities within their legal jurisdictionFrequent call-backs for explanations and missing data – i.e., missing Interstate Highway layer, cryptic building use codes, etc.Failure to meet minimum Street Feature Guidelines – limits the uses for partner-provided data (i.e., street matching, attribute harvesting, coordinate enhancement)
13Slide14
WVDHSEM Dataset
State-wide, consistent Current – within the last 2 yearsComplete MetadataMeets GSS-I minimum data GuidelinesResidential vs Non-Residential
14Slide15
Address Matching & Geocoding
15Slide16
Minimum Address Guidelines - MATCHING
To successfully match to the MAF, a partner address must include: Complete Address Number
Complete Street Name
AND
at least one of the following:
Address Coordinate
(latitude, longitude)
ZIP Code
Postal City and State
Census 2010 Tabulation State, County, Tract and Block Code
This minimum information allows the Census Bureau to
update the source data for an existing
MAF address
record, adding to our confidence that the address is valid.
16Slide17
Minimum Address Guidelines - GEOCODING
In order to update the location (geocode) for an existing MAF address, the partner address must meet the MATCHING requirements above, and also provide one of the following data items:
Address
Coordinate
(latitude/longitude)
or
Census 2010 Tabulation State, County, Tract and Block Code
17Slide18
Minimum Address Guidelines – ADDS
To ADD new partner addresses to the MAF, the partner address data must:meet the MATCH requirements above,and
include
an
address
t
ype
indicator identifying the address as residential, commercial, utility,
etc.
and
not already exist in the MAF
18Slide19
Minimum Address Guidelines – within UNIT IDENTIFIERS
For residential addresses with multiple units (i.e., apartments, condos, etc.), the partner address data should provide:a unique Within Structure Identifier (apartment #, unit #, etc.) to distinguish each unit from
other units at the same Basic Street Address (BSA).
o
r, if a Within Unit Identifier is not available or does not exist:
The
number of units at the
BSA
(i.e. “123 Main
Street - 25
Units
”)
and
A flag indicating which addresses are multi-unit
structures19Slide20
Total
Partner Addresses Received (4/04/14)33,354,160
Duplicate
Addresses Identified within Partner Datasets (multi-unit addresses missing unit identifiers)
1,647,877
5%
Total
Unduplicated Partner
Addresses
31,706,283
95 %
Total Partner Addresses
Matched
to
Master
Address File (MAF)
28,011,133
88% of Total
Addresses in
Same
Block as MAF
26,031,249
93% of Matched
Addresses
in Different
Block than MAF
1,589,558
6% of Matched
New
Geocode Attained
370,429
1% of Matched
Addresses w/ Same
Address
Class as
MAF
(residential, etc.)
14,634,970
52% of Matched
Addresses w/ Different
Address
Class
than MAF
567,247
2% of Matched
Addresses w/ No Address Class
Identified
12,808,916
46% of Matched
Total Partner Addresses
Unmatched
to
MAF
3,695,150
12% of Total
Unmatched Class
Residential
1,120,180
30% of Unmatched
Unmatched Commercial
/Other/
Unspecified
2,574,970
70% of UnmatchedSlide21
Block Level Address Feedback
Block
Total
Addresses
Total Residential
Total Nonresidential
Total Other
Total Matched
Total Added
Total Coordinates Added
Total Not Accepted
Total Not Accepted Duplicate
Total Not Accepted Incomplete
Total Not Accepted Other
Total Currently in MAF
1000
0
0
0
0
0
0
0
0
0
0
0
1
1001
1
1
0
0
1
0
1
0
0
0
0
1
1002
4
4
0
0
4
0
3
0
0
0
0
4
1006
5
5
0
0
4
1
3
0
0
0
0
5
1008
2
2
0
0
2
0
2
0
0
0
0
5
1010440000021113
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Consists of block tallies detailing:
What the partner provided
Number of records matched or added to the Census address list
Number of records not accepted
Total number of records currently in the MAFSlide22
Street Centerline Evaluation and Update
22Slide23
Interactive Review and Update
23The Census Bureau performs an interactive review of the potential new and misaligned streets using the partner data and current imagery
In this example, the
green-blue
lines indicate street updates made by the Census Bureau based on the partner data
The Census Bureau added 39 miles of new streets and modified 115 miles of misaligned streets based on this partner’s street centerline dataSlide24
Street Centerline Updates
8,887 total miles of feature updatesCharleston, WV to Rio de Janeiro, Brazil!Road Adds + Road Updates to MTDB
24Slide25
Feature Feedback25
Adding a date of last update field to the partnership shapefiles
:Slide26
Boundary and Annexation Survey (BAS)
Geographic program for legal governments to provide changes to their boundaries.2014 - was suspended due to Budget cuts2015 – has been Budgeted, but the funding has not yet been determined26Slide27
Contact the BAS Team at Census
http://www.census.gov/geo/partnerships/bas.htmlEmail: geo.bas@census.govPhone: 301-763-1099
27Slide28
Geographic Products
TIGERWEB
– WMS & REST map services
Cartographic Boundary Files
TIGER/Line
Shapefiles
&
Geodatabases
w/ Demographic Data
TIGER
Geodatabases
TIGER/Line
Shap
e
files
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
http://www.census.gov/geo/maps-data/Slide29
Census Geocoderwww.census.gov/geo/maps-data/data/geocoder.html
29Slide30
For more information, please visit:
http://www.census.govanne.l.jeffers@census.govThank you!
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