# How to Move points according to distance and azimuth? [duplicate]

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How to Move points according to distance and azimuth ?

## marked as duplicate by Vince, Farid Cheraghi, Get Spatial, Aaron♦Oct 6 '15 at 18:00

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## 1 Answer

The difference is really between the projected and geographic coordinates. Let me explain the case if you have projected coordinates - which is simpler:

``````original coordinates: x1,y1 (x:abscissa, y: ordinate)
distance: d
azimuth: a

x2 = x1 + d*sin(a)
y2 = y1 + d*cos(a)
``````

However, here are the formulas to calculate coordinates on the sphere based on the bearing and distance.

• I think you meant to flip sin() and cos() -- SOH-CAH-TOA - sine is the Y component (opposite), cosine the X (adjacent), though it depends on how you calculate azimuth (which should be in radians for computers) – Vince Oct 7 '15 at 3:30
• @Vince: I don't think so. Note that "a" is azimuth (an angle from the vertical, y axis) not the angle from the x-axis. – Matej Oct 7 '15 at 17:48