How do I calculate the Azimuth (angle to north) between two WGS84 coordinates

Question

I have got two WGS84 coordinates, latitude and longitude in degrees. These points are rather close together, e.g. only one metre apart.

Is there an easy way to calcu

Answer 1

I found this link

http://williams.best.vwh.net/avform.htm

given in the answer to

Lat/Lon + Distance + Heading --> Lat/Lon

This looks promising, especially the flat earth approximation given near the end.