Mapping Lines of Sight

William Davies has created a really interesting demo map that uses turf.js to map viewsheds. He was inspired to create the map after seeing Esri's Campus Blue Lights map, which uses viewsheds to show where the beacons on emergency telephones can be seen on a university campus.

William's Viewshed map uses turf.js to show where lines of sight intersect with building polygons on a Mapbox map. The