title: calculate the latitude longitude range of a specified region
body: <p>I am working in android <code>GoogleMap</code> project. I have the <code>Geo</code> position of the user (latitude and longitude) of the user. I want to calculate the co-ordinates the region with in 5 km (circle) of the user so that I can filter out the places from the database around the user. Any suggestions? </p>