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Time Based Run Cards: Better Fire/EMS Response in Prince George's County
2016 ESRI UC
The Department• Largest combination department in North
America
• 46 Stations
• 76 Engines, Trucks & Squads
• 155 EMS
• Specialized Services
• 2,400 responders
• Over 130,000 calls for service
2016 ESRI UC
• 30 years IT & Public Safety Background
Dispatcher, Programmer/Analyst, MIS
Coordinator, Background Investigator
• UMD BS Geography/GIS + Studio Art
• MSGIC Member
Charlie the Intern
2016 ESRI UC
• Box areas based on time
• Sensible measurement points
• Limited Access Highway merge points
Goals
Strategy
• Closest Facility to address points
• 270 stations
• 250,000 address points
• 150 highway merge points
• 1.25M routes for Box Areas
• 67.5M routes for run cards
2016 ESRI UC
General Process
• NA/CF: stations, address points, restrictions
• Update incidents with stations
• Assign box numbers
• Spatial Join address points to parcels for boxes
• Dissolve parcels on base box area
2016 ESRI UC
General Processcontinued
• Parcels to centerlines; Topology
for gaps & overlaps
• 1500’ NA/SA intersect address
points for hydrant zone
• Central address point for box area
measurements
• NA/CF for 270 stations to central
feature and merge points
• Export to Excel and reformat for
CAD
2016 ESRI UC
Challenges & Solutions
2016 ESRI UC
Collecting missing data (stations and hydrants)
• Collector App to capture private hydrant locations.
• Professional organization contacts (MSGIC).
• Internet browser “screen scrapes.”
• Phone calls.
Challenges & Solutions
2016 ESRI UC
Relocating Stations • Solve Closest Facility for new (and old) locations.
• Model and Python script that swaps old and new sites.
Challenges & Solutions
2016 ESRI UC
Unexpected Routing
Results
• Remove small turn-off ramps to prevent red light avoidance.
• Add Network Location Tool & Zoom to find network disconnects.
• Expand use of ESRI Tools during
development.
• Validate and collect data.
• Test - Edit – Repeat.
• Unit conversions.
• Imagery & knowledge of the area.
• Live with compromises.
Lessons Learned
2016 ESRI UC
Contacts
2016 ESRI UC
Mark E. Brady,
Fire/EMS PIO:
301-883-7154
Patrick Callahan,
OIT-GIS Manager:
301-883-5343
Charles M. Wrenn III,
Fire/EMS:
301-883-5786
