Geo-fencing: taking an action when a lat/lng point enters or exits a geographi shape

Good, or common, uses of geo-fencing include: location tracking of objects and users, lifehacking, games (in the form of run-arounds, check-ins), and hyper-local ads and offers. Apps that are obvious employers of geo-fences include: foursquare (check-in reminders). The code below code calculates great-circle distances between the two points – that is, the shortest distance over the earth’s surface – using …

Drawing library is a included feature. Those overlays- Circle, Polygon, Rectangle, Polyline can be stored in the database

You can use Drawing Tools of Google Maps API included in the control. Drawing tools You can store those data using SQL Geometry type. Those overlays- Circle, Polygon, Rectangle, Polyline can be stored in the database. Visit this Page on stackoverflow.com if you want to know how to store Google overlays in the database. Drawing library is a included feature. …