AED map project
One of our projects maps where people are likely underserved by registered public defibrillators (AEDs) in Switzerland. We created four interactive maps to compare two scenarios: only AEDs that are open 24 hours, and all registered AEDs regardless of access hours. Each scenario is shown twice, once in relation to where people live (resident population) and once in relation to where people work (employment density, a proxy for daytime crowding).
For each 1 km² area, AED deficit is the gap between the AED coverage our model predicts based on population or employment patterns across Switzerland and the coverage actually observed. A positive value means fewer AEDs than expected for that area. Risk score is the AED deficit multiplied by the number of people in that area, estimating how many people may be without timely access. Lighter colors indicate a higher risk score, meaning a greater potential gap in coverage.
The maps also highlight in red the top 5 percent of areas with the highest risk scores. Clicking on a cell reveals the AED presence (yes/no), the number of residents or workers, the AED deficit, and the risk score. These views make it easy to see how extending AED access to 24 hours and accounting for day versus night demand changes the pattern of need across Switzerland.
INFO: The maps can be downloaded individually or all together as a ZIP file and then opened. Map lines delineate study areas and do not necessarily depict accepted national boundaries.
