GIS in Pennsylvania State Corrections · Why use maps? •Visualize a plan or see patterns •Everything happens somewhere 2
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GIS in Pennsylvania State Corrections
Pennsylvania Department of Corrections, Bureau
of Planning, Research, and Statistics (PRS)
Michele Hiester (mhiester@pa.gov)
Joseph Hafer (jhafer@pa.gov)
Why use maps?
• Visualize a plan or see patterns
• Everything happens somewhere
2
How is PRS Using Maps?
• Map offender demographics and activities
• Offering parolees needed services
• Administrative uses for staff and human
resources
• Making site selection decisions
3
What Software is Utilized?
• Data extraction and manipulation
Microsoft Access and Excel
• Mapping
ESRI Products
ArcGIS Desktop Basic (v 10.4.1)
ArcGIS Online
What Data is Used?
• Inmate/Parolee Demographics
Gender, age, race, type of offense, level of
risk, etc.
• Address data:
Inmate “Legal Address”
Inmate “Notify Address”
What Data is Used?
• Address quality matters
Typos, spelling and spacing
Creative abbreviations (Str for street, Nth
for north)
“Girlfriend,” “Mother,” “US Marshal,” or
“Siena House” are not recognized as streets
• 80% match w/ intense scrubbing
6
What Data is Used?
• Geocoding
ESRI, US Census Online Geocoder
• Committing County
68 values: 67 counties and Out-of-state
Clean and easy to use
Proxy for county of residence, NOT the same
as county of residence
What are the Map Types?
• Facility Location
• Choropleth
• Spatial Analysis
• Online Interactive
FACILITY LOCATION MAPS
CHOROPLETH MAPS
Three-Year Overall Recidivism Rates by CountyFor Inmates Released in 2006 – 2008
SPATIAL ANALYSIS MAPS
Mapping Misconducts and Fights in SCIs
ONLINE INTERACTIVE MAPS – WWW.COR.PA.GOV
What is Next?
•Parole address data
•Improve Reentry services
•Parole violations and recidivism
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