I had the same problem and found my sources at http://williams.best.vwh.net/avform.htm . Ed Williams goes into detail on great circle navigation. I took his formulas for distance between points and true course and translated them into PHP. Projecting a point is given as well. The translated PHP formulas calculate the same numbers as my Garmin 76cxs. Regards, Tom Birchmire
On Aug 22, 4:17 am, Panut Sunyakorn <panu...@gmail.com> wrote: > This will help you. > > http://www.movable-type.co.uk/scripts/latlong.html > > 2009/8/22 Mark Murphy <mmur...@commonsware.com>: > > > > > > > alexdonnini wrote: > >> I had already considered using the GCC formula (I did not know the > >> name GCC). Unfortunately, the only lat/lng information I have is mine, > >> none other. This is why the problem is a little trickier. > > > There are an infinite number of latitude/longitude combinations at a > > distance X from a fixed point. You are going to need some other > > criteria, such as a direction, in order to come up with your second > > position. > > > -- > > Mark Murphy (a Commons Guy) > >http://commonsware.com|http://twitter.com/commonsguy > > > Android Training in Germany, 18-22 January 2010:http://bignerdranch.com > > -- > > Panut Sunyakorn > 086-334-1616 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
