Secondary Data
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Transcript Secondary Data
Secondary Data
Census and TIGER
Why Secondary Data?
Context (geographic, temporal, social)
for primary data.
Secondary data may provide validation
for primary data
Secondary data may act as a substitute
for primary data.
Types of Secondary Data
How to find it
Official
Unofficial
Unofficial Secondary Data
Sources
Private research results
Research reports, research papers,
textbooks
Opinion polls
Market research
On-line databases
Anecdotal/hearsay
Official Secondary Data
Sources
Agriculture
Business/Industry
Crime
Education
Finance
Energy
Environment
Health
Transport
Weather
Agriculture
USDA
FAO
Farm Bureau Federation
Babcock
Business / Industry
STAT-USA/Internet (US Dep. of
Commerce, not free)
Consumer Expenditure Surveys
(Bureau of Labor Statistics)
Internal Revenue Service
Crime
Bureau of Justice Statistics
FBI
Crime & Justice Electronic Data
Abstracts
http://www.ojp.usdoj.gov/bjs/dtdata.htm
Education
National Center for Education Statistics
School District Data Book (ORST)
National Science Foundation
UNESCO
Environment
EPA Envirofacts
EPA EnviroMapper
Facility Information
Hazardous Waste Data
Superfund
Toxics Releases Inventory
Water Discharge Permits
ScoreCard
Right To Know
Health
National Center for Health Statistics
(CDC)
Social Security Administration
Geophysical
NOAA
USGS
US Forest Service
Soil Conservation Service
Dep. of Natural Resources (DNR)
Dep. of Conservation
Transportation
Department of Transportation
Bureau of Transportation Statistics
State Highway Departments (CA, TX)
Regional Transport Authorities
Census
Structure
Timing
Population
Organization
Analysis
Presentation
Geographical Hierarchy
Variables
Census Geographical
Hierarchy
Region
Division
State
County
County subdivision
Place (or part)
Census tract (or part)
Block group (or part)
9 mio. Census blocks
Census Household
Variables
Number of persons
Age and gender
Race
Language
Income and poverty
Education
Employment
Citizenship
Vehicles for commute
Disability
Homeownership status
Vacancy
Rent and value of
housing
Age and type of structure
Plumbing and Kitchen
Heating
Examples of Census
Variables
Accommodations
Agriculture
Alaska Natives
Arts, Entertainments
Asians
Assets
Assistance
Capital Expenditures
Child Care/Support
Commodity Flows
Communications
Consumer Income
County Business
Patterns
County/City
Government
TIGER
Topologically Integrated Geographic
Encoding and Referencing system
Based on USGS topographic maps
but majorly augmented
Contains no elevation data
No copyright
No street names
American Community
Survey
Annual
Long
Representative – not comprehensive
Master Address File for sample selection
Wisconsin a forerunner
Pro’s and Con’s
of Secondary Data
Advantages
Cheap
Timeliness
Access to
people/organizations
that we wouldn’t
have access to
otherwise
Less post-processing
Disadvantages
Collection method
unknown
Lack of control
Data Vendors
Remote Sensing
Value adding to public data
Utilities
Market Research
GIS Vendors
University Extensions
World Bank
Before YOU Purchase Data
Accuracy
Compatibility
Lineage and metadata
Who owns the copyright?