>>>By the way
>>>
>>>You are using a constant 3958.75586574. I believe this is the radius of the earth in miles. If you want km, I'd use 6371
>>>
>>>Source - http://www.movable-type.co.uk/scripts/latlong-db.html
>>
>>George suggests to use
>
>
>I don't care what George is suggesting
>

Are all other constants used in the calculations correct for km? In other words, should the only change be in the Earth Radius?

What is 111 ?