Ambulance Service Areas
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Jackson County is comprised of 3 ambulance service providers each responsible for dispatching to a specified area known as an Ambulance Service Area (ASA). In the past, the ASA boundaries were somewhat arbitrary and regularly split taxlots. The lack of distinction between one ASA and another created a situation where two service providers would respond to the same residence from opposite directions. In the spring of 2008, the task of re-digitizing these boundaries was given to Karim Naguib at Jackson County GIS Services. There were three things that needed to be kept in mind while reproducing the ASA boundaries. 1) Maximize response times 2) Minimize overlapping responses 3) Make sure the boundaries were divided fairly To maximize response times it was important to consider access issues. In the previous ASA boundary, there were a handful of site addresses where a service provider would have to drive into another ASA and then double back to their own ASA in order to access a residence in distress. This issue lowered response times for the service providers and caused some confusion as to who the proper responder should be. The fastest way to isolate these issues was to display driveways from Jackson County GIS Services driveways layer. To minimize overlapping responses, it was important to make sure that there were very distinct boundaries between each of the ASA's. To complete this task, the previously existing ASA boundary was taken and the lines were followed throughout the entire county, and snapped to taxlot lines and vertexes rather than simply drawing them freehand style. It was during this process that the driveways layer was incorporated, making sure that where there was a confliction between taxlots, the service provider with the best access would get the response. The end result was a neat ASA boundary that matched taxlot boundaries. In order to make sure the boundaries were divided up evenly between the three providers, it was apparent that Jackson County GIS Services could not make the final decision. The first step to ensure this goal was met was to contact Gary Stevens at Jackson County Health and Human Services (our primary contact on this project). After email communications back and forth between Gary and Karim, in an attempt to talk each other through their ideas of how the ASA's should be drawn, they decided to meet face to face with representatives from each of the three service providers to make sure that everybody agreed on where the boundaries should be drawn. With representatives from Mercy Flights, Ashland Fire and Rescue, and the Rogue River Fire Department, as well as Gary Stevens present, the new ASA boundaries were edited in real-time. As the discussions were taking place, the lines were being re-digitized to match what the providers had agreed upon. Once all of the discussion had ended, the boundary was reviewed one more time to make sure that the changes were exactly what each provider had expected, and that each of them was happy with the outcome. After returning to the office, topology rules were created which were designed to point out mismatches in the lines of the ASA's. Where ever one ASA boundary crossed or did not perfectly overlap another, an error message would appear on the map showing exactly where the issue was. Once all of the errors were located and corrected, the topology rules were re-run to double check for accuracy. </SPAN></P></DIV></DIV></DIV>
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[]
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