U.S. Census Bureau
description
Transcript of U.S. Census Bureau
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U.S. Census Bureau
• 3 Censuses:– Decennial Census
• Age• Race• Sex• Relationship to
householder– Economic Census– Census of Governments
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Profile Maps of States
http://www.census.gov/geo/www/maps/2010_census_profile_maps/census_profile_2010_main.html
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Age Distribution of Population
Nebraska Texas Utah
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Center of Population of the United States
http://2010.census.gov/2010census/data/center-of-population.php
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Population Change 2000-2010
http://2010.census.gov/2010census/data/
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Population Change 2000-2010 in ArcGIS Online
http://www.arcgis.com/home/webmap/viewer.html?webmap=0a27f5cb1f07478fbdf117b70231c5c2
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Population Change in Travis County
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Finding the Right DataPopulation, housing, economic & geographic data
Shapefiles prepared for GIS users
http://www.census.gov/
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TIGERTopologically Integrated Geographic Encoding and Referencing
System
• TIGER is geographic data– State and county lines– Updated annually
• For census data, American FactFinder (http://factfinder2.census.gov)
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Standard Hierarchy of Census Geographic Entities
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Getting TIGER Shapefiles
http://www.census.gov/cgi-bin/geo/shapefiles2010/main
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Selecting Travis County, Texas
Pick a State
Pick a County
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Travis County Census Tracts (218)
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Travis County Census Blocks (15922)
Average of 73 Blocks per Tract
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Census Blocks
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A Census Block (38 houses)
Texas
Travis
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Census Shapefiles with Population
http://www.census.gov/geo/www/tiger/tgrshp2010/pophu.html
ftp://ftp2.census.gov/geo/tiger/TIGER2010BLKPOPHU/
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All the Census Blocks for a Stateftp://ftp2.census.gov/geo/tiger/TIGER2010BLKPOPHU/
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Census Blocks for Texas (914,231)
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Census Blocks in Travis County
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Population and Housing Units
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Population and Housing Units in Travis County
Population = 1,024,266
Housing Units = 441,240
Pop/HU = 2.32
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Surface and Groundwater Systems
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San Marcos Basin
Austin
San Antonio
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Clip Function
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Population of the San Marcos Basin
Population (2010) = 179,727
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Edwards Aquifer
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Population Living Over the Edwards Aquifer
Population (2010) = 2,352,709
Large Tracts in Low Population AreasSmall Tracts in High Population Areas