A geofence system which locates a position as within or without the complex polygon type geofence using a simplified algorithm. The algorithm obtains a position and compares it to the polygon by establishing a ray from the position constructed in a cardinal direction of the coordinate system. The “polarity”...http://www.google.fr/patents/US8046168?utm_source=gb-gplus-shareBrevet US8046168 - System and method for determining position within or without a complex polygon geofence
System and method for determining position within or without a complex ...
