Distance between two latitude / longitude points
*South Latitude and West longitudes are taken as negative with - sign.
* numerical value of latitude is from - 90 (south pole) to 0 (equator) to + 90 (north pole)
* numerical value of longitude is from - 180 to 0 (GMT) to + 180 & passes through Fiji islands and pacific ocean.
* Each latitude and longitude is divided into degree, minutes and seconds. Each degree is divided into 60 minutes and each minute into 60 seconds.
* Pit the value in degree only including decimal.