Compute the coordinate increments (ΔN, ΔE) from a distance and a bearing.
输入距离 D 与方位角 α(度),求北向与东向增量。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Forward computation | ΔN = D · cos(alpha); ΔE = D · sin(alpha) | GB 50026-2020, Code for engineering surveying |
| Coordinate convention | In surveying planes the vertical axis is north (N) and the horizontal axis is east (E) | GB 50026-2020, Code for engineering surveying |
| Inverse check | sqrt(ΔN^2 + ΔE^2) should return D, serving as a check | GB 50026-2020, Code for engineering surveying |
| Azimuth definition | Azimuth is measured clockwise from north, unlike the mathematical angle convention | GB 50026-2020, Code for engineering surveying |