Create GeoJSON isochrone contours based on how far you can drive, cycle or walk in an interval based on the [Open Source Routing Machine (OSRM)](https://project-osrm.org).
From the location of ambulance posts, create two GeoJSON files, one that contains their locations, the other contains the area they can reach within 15 minutes. To determine this, we are creating a small script that will use [OSRM](https://project-osrm.