DEVELOPMENT OF FIRE RESPONSE ZONES USING NETWORK ROUTING TO DETERMINE SERVICE AREAS AND RESPONSE...
-
Upload
belinda-norton -
Category
Documents
-
view
212 -
download
0
Transcript of DEVELOPMENT OF FIRE RESPONSE ZONES USING NETWORK ROUTING TO DETERMINE SERVICE AREAS AND RESPONSE...
DEVELOPMENT OF FIRE RESPONSE ZONES USING NETWORK ROUTING TO DETERMINE SERVICE AREAS AND RESPONSE TREES
Alex SmithCapstone Peer Review PresentationOctober 1, 2008Advisor: Dr. Alexander Klippel
Outline
Background Information Problem Potential methods of segmentation Proposed procedures Questions
Richland County, South Carolina 767 Square miles 350,000 people Important features
Fort Jackson – 52,000 Acre Army basic training facility
Congaree Swamp National Park – 26,000 Acres
Richland County, South Carolina
Map of SC Map of Richland
County
County Location County Detail
Emergency Dispatch
675,000 calls per year to 911 Center result in 475,000 incident dispatches
Fire Response
38,000 fire dispatches per year – 105 per day
3600 road miles 30 fully staffed fire stations
“Preserve lives, property and resources”
911/ Dispatch Procedures (Quickly)1. Citizen dials 9112. Call routed by phone carrier to Public
Safety Answering Point (PSAP)3. Call answered at 911 Center
1. Phone carrier provides number, address, and Emergency Services Number (ESN)
4. Nature of call determined (Police, Fire, EMS)
5. Closest unit determined and dispatched*
Outline
Background Problem Explained Potential methods of segmentation Proposed procedures Questions
Problem Explained
Currently, the way in which a fire suppression unit is chosen for dispatch is…less than desireable Dispatch may not be same in two identical
incidents at the exact same location
There exist two methods – neither of which has been updated or maintained completely over the past 7 years Emergency Services Number (ESN) Computer Aided Dispatching (CAD) System
Proposed Solution
For every location within Richland County, I will develop a call list, in order, of the 10 quickest responding units of each type (Engine, Ladder, Battalion, Pumper, Brush)
Any time a call location is determined, a simple point in polygon analysis will determine the call list of responding stations
The resulting methodology will be repeatable, providing for updated data in the future
Outline
Background Problem Potential methods of
segmentation Proposed procedures Questions
Straight Line DistanceVoronoi Tesselation or Thiessen Polygons
Straight Line Distance
Quick Easy
Does not take into account actual travel time
Calculates as if fire response apparatus did not require roads
Advantages Disadvantages
Raster Allocation - Cost
Raster Allocation - Cost
Quick and relatively simple
Better result than straight line distance
Can not provide for unique situations such as one way roads
Does not provide as good a result as is possible with vector based calculations
Advantages Disadvantages
Vector Based Network Analysis
Vector Based Network Analysis
Vector Based Network Analysis
Vector Based Network Analysis
Vector Based Network Analysis
Vector Based Network Analysis
Most accurate results of methods available
Parameters can be tweaked
Includes one-way streets and turn prohibitors
Difficult to set up Cumbersome
analysis Results need
human verification
Advantages Disadvantages
Outline
Background Problem Potential methods of segmentation Proposed procedures Questions
First Closest – 4 Units
Second Closest – 4 Units
Third Closest – 4 Units
Fourth Closest – 4 Units
4 Units – Call List
1st
2nd
3rd
4th
4 Units – Call List
1st
2nd
3rd
4th
1 2 2 3 3 4
4 Units – Call List
1st
2nd
3rd
4th
1 2 2 3 3 4
2 1 3 2 4 3
4 Units – Call List
1st
2nd
3rd
4th
1 2 2 3 3 4
2 1 3 2 4 3
3 3 1 4 2 2
4 Units – Call List
1st
2nd
3rd
4th
1 2 2 3 3 4
2 1 3 2 4 3
3 3 1 4 2 2
4 4 4 1 1 1
4 Units – 911 Call
1st
2nd
3rd
4th
4 Units – 911 Call
1st
2nd
3rd
4th
4 Units – 911 Call
1st
2nd
3rd
4th
3
2
4
1
4 Units – 911 Call
1st
2nd
3rd
4th
3
4 Units – 911 Call
1st
2nd
3rd
4th
3
2
4 Units – 911 Call
1st
2nd
3rd
4th
3
2
4
4 Units – 911 Call
1st
2nd
3rd
4th
3
2
4
1
Network Impedances
Speed Limits Street Widths Other Factors
One way streets Turn Prohibitors
Medians and fencing
Locked gates
Distance or time?
Temporal Variables Daily and
seasonal
10 Closest – by drive time
10 Closest – by drive time
Final Intended Results
A map in which at every location, we can immediately determine the response list of units to dispatch in an fire emergency 1st to 10th responder for each type of
apparatus
Use of Final Results
Emergency dispatch for fire
Richland County
Fire Response
Plan
Use of Final Results
Commercial Fire!!!
153
Use of Final Results
Commercial Fire!!!
Commercial FireResponse
• 2 Engines• 1 Tanker• 2 Battalions•1 Ladder
Richland County
Fire Response
Plan
Timeline
October 1, 2008 – Peer Review Proposal December 2008 – complete analysis January 2008 – test and verify results February 2008 – finalize and finish
presentation February 19, 2008 – presentation at
North Carolina GIS Conference in Raleigh, NC