Use of Geospatial Technologies for Census Data Collection: Issues and Considerations Timothy Trainor...
-
Upload
calvin-copeland -
Category
Documents
-
view
216 -
download
0
Transcript of Use of Geospatial Technologies for Census Data Collection: Issues and Considerations Timothy Trainor...
Use of Geospatial Technologies for Census Data Collection: Issues and
Considerations
Timothy TrainorU.S. Census Bureau
In order to be useful a census must be:
government, census tract, census block
government, census tract, census block
data accuracy location
data accuracy location
correct
reliable
Geographic Support for Data Collection Activities
Components of a Census Geographic Support System
Who does the work???
Geographers Geographic area criteria and delineation
Cartographers Map the data
Software programmers Write the code to process the data
Database Administrators Maintain the integrity of the data
IT specialists Keep the hardware working properly
All of the above??
GEOGRAPHY DIVISION ORANIZATION CHART
Organizational Structure
Geography Division
ProgramManagement
GeocartographicProducts
AndServices
Partnerships
Spatial Data Systems
Address Systems
Database Systems
MappingGeographic Area
Criteria andDelineation
GeoproccessingMAF/TIGERMaintenance
Features Addresses
Technology Considerations
Learning and developing organizational capabilities
Buying expertiseCommercial vs homegrown vs hybrid
solutions
Recent Technology Developments
Maturing GIS Imagery availabilityGlobal Positioning Systems (GPS)Mapping system developmentSpatial database developmentAddress list development
The Evolution of the Census Bureau’s TIGER System
Data collaborationEra of pre-Commercial Off The Shelf
environment for database technologies
Development of an in-house system
Modernizing TIGER in Response to Changing Technology
Data integration issues Use of GPS and imagery Accuracy improvements
Street centerlines
Data model improvements real world features
Database developments Use of Oracle – emphasis on maintaining topology
Challenge
Control the Cost and Improve the Accuracy of the Decennial Census
Issues in Preparing for Geospatial Technologies
Proposal JustificationFundingGeospatial Data SourcesData Sharing Data QualityWorkforce
Proposal Justifications
Why are geospatial technologies needed in a census?
What are the benefits?What would be the impact without
geospatial technology?Could this investment benefit others?
Funding Issues
Adequate budget Hardware Software Communications Data Personnel
Geospatial Data Source Considerations
Existing geospatial dataData collection
Census field operations On-going data updates
Data integration
Data Sharing Issues
Partnerships Public
State Local Tribal Federal
Private Copyright issues Maintaining value-added benefits
Data Quality Issues
Variable data - Large non-uniform differences in spatial errors in a relatively small area
InconsistenciesMetadata
Mason
Starbridge
10m
100m
The Workforce
Geographers and cartographers (50%) IT staff (50%)Contractors supplement existing staff
Conclusion
Learn from the experience of others (both good and bad)
Share expertise and learned best practices
Keep it simple