Compute the great-circle distance between two points with the Haversine formula, accepting decimal degrees or degrees-minutes-seconds.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Great-circle distance | d = R·arccos(sinφ1·sinφ2 + cosφ1·cosφ2·cosΔλ) | Spherical trigonometry; WGS84 R=6371 km |
输入两点的经纬度坐标,使用 Haversine 公式计算地球表面大圆距离,输出公里、英里、海里、方位角与中点坐标。