CENSUS GEOGRAPHY WORKSHOP

Tim McMonagleGeography

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 geography00 at the end = 2000 census geography

• ext – file extension

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Attribute and Data Tables

Join Function

Tim McMonagleGeography

Los Angeles Regional OfficeU. S. Census Bureau

Timothy.william.mcmonagle@census.gov818-267-7124

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