Loading map markers based on current lat/long

[Peter]

Location sensor (ringed fence / circular ringed fence)

I do not believe what you tried will work unfortunately. How to tell you if your device is near a destination is either to create a ringed fence and determine whether you are in the polygon of the geocoordinate limits or to calculate your distance from point of interest and when that distance is within certain limits; do something. A simple way to determine how far you are from a destination is described here: Geofence - using the MIT Map and Circle components to define a circular geofence b…