Great Circle Calcbearing - What Am I Doing Wrong?

[WarpD 824]

In defense of Mr. William's math... sitting at KORD RW32L... I get an initial bearing of 310 to 3CK.

 

I have used the GC math on that website for many years. It is most definitely not inaccurate at all.

[mgh 89]

The equation http://williams.best.vwh.net for distance is wrong. It omits the radius of the earth.

 

Distance between points

The great circle distance d between two points with coordinates {lat1,lon1} and {lat2,lon2} is given by:

d=acos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon1-lon2))

[WarpD 824]

Might want to do a bit more reading to grasp why you see no earth radius in the calculation. There's a valid reason, and the calculation is accurate as it is written.

[dragonflightdesign 98]

Yes, but that doesn't  account need to convert into decimal degs from degminsec units in the first case.

 

And that was my problem. Many thanks Gerry.