I have a system that can alert staff by email if their device goes into/out of a geo-zone
However, we now need to create a route, and then email if someone goes off this route
Technically, how would i do this? I have no idea! Do you just check their GPS location and see if it exists within the GPS co-ordinates of a route?
I'm using openlayers framework
....an afterthought Is a route a really narrow geozone?