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Meeting NFPA 1710: Using GIS to Model Ideal Fire Station Allocation

2009 Ohio GIS Conference September 16-18, 2009 Crowne Plaza North Hotel Columbus, Ohio. 2009 Ohio GIS Conference September 16-18, 2009 Crowne Plaza North Hotel Columbus, Ohio. Meeting NFPA 1710: Using GIS to Model Ideal Fire Station Allocation. Jennifer Weisser GIS Coordinator

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Meeting NFPA 1710: Using GIS to Model Ideal Fire Station Allocation

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  1. 2009 Ohio GIS Conference September 16-18, 2009 Crowne Plaza North Hotel Columbus, Ohio 2009 Ohio GIS Conference September 16-18, 2009 Crowne Plaza North Hotel Columbus, Ohio Meeting NFPA 1710: Using GIS to Model Ideal Fire Station Allocation Jennifer Weisser GIS Coordinator Deerfield Township Randall W. Hanifen Adjunct Professor/Fire Officer University of Cincinnati/ Deerfield Township

  2. Project Beginnings • Fire station locations • Where to locate a new station? • Where to relocate a station?

  3. Interdepartmental Solutions • Need expertise from both GIS and Fire Departments to approach this project • Building relationships with other governmental entities to facilitate data exchange

  4. Fire Literature • 1710: 4.1.2.1 time objectives for call response • 1710: Appendix A  explanation of standard language • 90% of calls within 6 minute response • 1 minute dispatch time • 1 minute turnout time • 4 minute drive time • Fractile vs. average • 90% fractile is 5.5 minutes • Average is 3.5 minutes

  5. Fire Literature • Fire Protection Handbook 20th edition volume 2 section 12 chapter 13: GIS for fire station locations and response protocols (AKA ESRI white paper) • Incident analysis • Travel time modeling • Importance of response time  fire & EMS • Fire department total reflex time sequence  dispatch time, turnout time, response time, access time & setup time • Reducing response times • NFPA 1221  standard for installation maintenance & use of emergency services communication

  6. Measuring Distance Euclidean Network

  7. Data - Street Network • Clean geometry • One-way designations • Hierarchies • Speed limits • Segment distance • Conversions & calculations • Length_miles = Shape_length/5280 • Minutes = Length_miles*(60/speed_limit)

  8. Data - Turning Penalties

  9. Analysis Settings

  10. Service Area Generation

  11. Service Area Generation No Trim Trimmed

  12. Service Area Generation Detailed Polygons Generalized Polygons

  13. Statistical Verification of Model • Paired t-test • To compare historical call times (reality) to calculated response time (model) • Objective  keep null hypothesis

  14. Service Areas

  15. Model Applications • Calculate the existing service areas for the current configuration of fire stations • Alternative scenarios of fire station arrangements • Impact of preempting devices on service areas • Evaluation of emergency response zone borders & mutual aid with other jurisdictions • Location allocation • Assisting with the accreditation process

  16. Contact Info Jennifer Weisser 513-701-6967 jweis@deerfieldtwp.com ~~~ Randall W. Hanifen 513-266-6124 Randall.Hanifen@uc.edu

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