Compute ellipsoid volume from three semi-axes a, b and c using V = 4/3·π·a·b·c.
输入三个半轴 a、b、c,求椭球体积。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Ellipsoid volume | V = (4/3)πabc | Analytic geometry |
| Sphere case | a=b=c=r gives sphere | Degenerate case |
| Spheroid | a = b ≠ c spheroid | Earth ellipsoid |
| Reference ellipsoid | WGS84 a = 6378.137 km | WGS84 |
| Surface area | No simple closed form | Knud Thomsen formula |
| Units | Cubic length units | Dimensional rules |