census geography workshop tim mcmonagle geography los angeles regional office 1
TRANSCRIPT
CENSUS GEOGRAPHY WORKSHOP
Tim McMonagle
Geography
Los Angeles Regional Office
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Hierarchy of Census Geography
Changes in California Census Geography for 2010
Geographic Entities 2010 Census
Census 2000
American Indian / Alaska Native / Native Hawaiian Areas 108 103
Block Groups 23212 22133
Census Blocks 710145 533163
Census Tracts 8057 7049
Congressional Districts (108th - 112th) 53 53
Counties and Equivalents 58 58
County Subdivisions 397 387
Elementary School Districts 548 571
Places 1523 1081
Secondary School District 104 92
State Legislative Districts (Lower) 80 N/A
State Legislative Districts (Upper) 40 N/A
Unified School Districts 335 326
Voting Districts 17582 N/A
2010 Census Tract Criteria
New Census Tracts Coding Series9400-9499 Any tract with a majority of population and/or area on Hawaiian Home Lands9800-9899 Special Land Use tracts9900-9999 Water Census Tracts
What are TIGER/Line Shapefiles?
• Extracts of selected geographic and cartographic information from MTDB.
• Nationwide coverage• Contains no sensitive data• Are designed for use with GIS• Contains geographic linear, areal, and point features,
including attribute information• Geographic entity boundaries• The legal and statistical areas for which Census
tabulates data
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File Naming ConventionThe name of each file is:
tl_2010_<extent>_<layer>_<ext>• tl- TIGER/Line• 2010- version• extent - 2 digit state FIPS code
- 5 digit state county FIPS code• layer- type of geography or feature
10 at the end = 2010 census geography
00 at the end = 2000 census geography• ext – file extension
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Attribute and Data Tables
Join Function
Tim McMonagle
Geography
Los Angeles Regional Office
U. S. Census Bureau
818-267-7124
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