Angle between two points of lat-lon (cheat-sheet)

[eteb3]

@Robert_Whittaker

the equation of the line is

(y-y1)/(y2-y1) = (x-x1)/(x2-x1)

So for any given point (x,y) you can tell which side of the line it lies by looking at which of those two expressions is larger.

This is great, thank you: will do the job very well, I think.

I’ll post the Calc formulas once I’ve got it all sorted, in case it’s useful to anyone.