the global population map - esriproceedings.esri.com/library/userconf/proc15/papers/106_590.pdf ·...
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census.gov/population/international
The Global Population Map
Tom FitzwaterU.S. Census Bureau | Population Division
Disclaimer: This presentation is to inform interested parties of ongoing research and to encourage discussion of work in progress. Any views expressed on statistical, methodological, technical, or operational issues are those of the author and not necessarily those of the U.S. Census Bureau.
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census.gov/population/international
The Global Population Map completely covers the Earth’s land surface.
Available for every country and territory.
Population estimates for about 70,000 subnational areas.
GIS formatted for spatial analysis.
Will be available online.
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census.gov/population/international
Background:U.S. Census Bureau
International Programs
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census.gov/population/international
International Data ProductsThe U.S. Census Bureau conducts applied research and analysis on international topics. Demographic, economic,
geographic, health, and aging issues.
Data products include the International Data Base (IDB) and HIV/AIDS Surveillance Data Base
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census.gov/population/international
International Data ProductsWe also produce subnationalpopulation estimates. Global Population Map:
vector-based subnational population estimates.
Demobase: raster population estimates. Pilot datasets for Haiti, Pakistan,
and Rwanda available online.
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census.gov/population/international
International AssistanceWe help build capacity of other national statistical offices. In-country & regional workshops. Technical assistance & consulting. GIS training frequently provided.Our International Assistance program has been active for over 65 years.
Zambia
Jordan
Namibia
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census.gov/population/international
Where We Work
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census.gov/population/international
CSPro Census and Survey Processing
System (CSPro). Used by hundreds of
organizations and 160+ countries for entering, editing, tabulating, and disseminatingcensus and survey data.
Data entry app for Androidnow available (CSEntry).
Free and public domain.
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census.gov/population/international
Headquarters WorkshopsIn 2012, we re-established our Washington, D.C. workshop program.Since then, we have trained professionals from 30+ countries.Topics: Census and survey data processing Demographic analysis Gender statistics Data analysis and dissemination Spatial data managementSchedule of classes available online.
Gender Statistics
Demographic Analysis
GIS
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census.gov/population/international
Census Bureau LibraryWe also maintain a library of international statistical data. Materials cover nearly every
country and territory. More than 115,000 statistical
publications. Historical materials date back to
1800s for some countries. Located at Census Bureau HQ
and open to the public (by appointment).
Inter-Library Loan (ILL) also available.
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census.gov/population/international
Global Population Map: Data
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census.gov/population/international
We have built a linked subnational population and boundary data collection covering every country and territory of the world.
We collect data globally but focus our efforts on countries with populations at risk from natural disasters and complex humanitarian crises.
National Research Council. Tools and Methods for Estimating Populations at Risk from Natural Disasters and Complex Humanitarian Crises. Washington, DC: The National Academies Press, 2007.
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census.gov/population/international
Population Data Ideal source: a census. Complete count of the
population. Most robust source of
population data, but not necessarily timely.
Alternatively, we can use more recent official estimates.
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census.gov/population/international
Geospatial Data We focus our collection efforts on subnational
administrative boundaries. E.g., provinces, counties, cities, townships
Sources: National governments International/regional bodies Research organizations Free and open sources online (ideal)
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census.gov/population/international
Global Population Map: Methods
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census.gov/population/international
Step 1: Reconcile DataGIS boundary data must match one-to-one with census tabular data.Usually requires substantial research/editing to reconcile.
Ethiopia Boundary Changes
1984
1994
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census.gov/population/international
Step 2: Estimate PopulationSubnational census total populations are projected forward to a target date using the national level IDB numbers as the control.Further refinements (where possible): Estimates of 5-year age/sex groups. Two or more censuses used for greater local
variation in projections over time.
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census.gov/population/international
Used the Large-Scale International Boundary (LSIB)dataset produced by the State Department.
Available for download from hiu.state.gov/data.
LSIB is authoritativeand generally accurate to within1 km.
Step 3: Integrate Seamlessly
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census.gov/population/international
Global Subnational Boundaries
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census.gov/population/international
Global Population Distribution
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census.gov/population/international
Global Population Map: Dissemination
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census.gov/population/international
Available on Census.govGlobal Population Map Total population estimates for
every country at the smallest administrative unit.
Will be available for bulkdownload.
Demobase Raster (100-meter) population
estimates. Available for Haiti, Pakistan, and
Rwanda.
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census.gov/population/international
Available Through Our PartnersEnhanced subnational estimates and projections for selected countries. Includes population estimates
and projections for the years 2000-2015.
Covers all five-year age/sex groups.
Available through USAID-funded Demographic and Health Surveys (DHS) Program Spatial Data Repository.
spatialdata.dhsprogram.com
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census.gov/population/international
International Map ViewerDeveloped using ArcGIS Viewer for Flex. Initially, just basic functionality and limited
data for viewing (national only). Plan to release subnational data soon (both
in viewer and for download as shapefile). Plan to re-write viewer using ArcGIS API for
JavaScript in the future.
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census.gov/population/international
International Map Viewer
Direct link: census.gov/population/international/data/intlmapviewer.html
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census.gov/population/international
Population Distribution of the World
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census.gov/population/international
Thank You
Tom FitzwaterU.S. Census Bureau | Population Division
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census.gov/population/international
1. Converted our polygon data to lines2. Deleted inconsistent international boundaries3. Replaced with LSIB boundaries4. Cleaned up topology5. Converted back to polygons6. Exported attributes from original (exploded) dataset as centroids and
rejoined to new dataset
Integration into Global Dataset