Calculating the distance and direction between two points along the surface of Earth.
Reference:
1. Bearing and distance calculation methods
2. 经纬度方面的计算
3. 根据两点的经纬度求方位角和距离
4. 經緯度計算距離公式
5. Android獲取經緯度、計算距離、方位角
6. java 已知兩個地點經緯度算距離（非常精確）
Vincenty’s Formula
1. Java, GPS Receivers, and Geocaching: Vincenty’s Formula
2. Java Geodesy Library for GPS – Vincenty’s Formulae
3. World Geodetic System
4. World Geodetic System 1984 (WGS84)