Distance Lat Long Caculations

Is there a way of computing the new lat2 and long2 of a position
reached after travelling x metres on a bearing of y degrees given a
known start position of say lat1 long1. It is like the inverse of the
Haversine formulaes but i am not clever enough to do the inversion.
Mant thank for any help
Tony

Yes - use the "geod" program bundled with proj4
(http://www.remotesensing.org/proj/ ). Because of small angle problems,
geodetic distance calculations using trigonometric formulae directly
are error-prone. However, the formula would be:

1) Express the distance in angular units (i.e. divide by 2*Pi*Radius
of the Earth to get it in radians).
2) Cos(new co-Latitude) = -cos(co-Latitude)*cos(distance) +
sin(co-Latitude)*sin(distance)*cos(Azimuth)
3) Sin (difference in longitude) = sin(distance)*sin(Azimuth)/sin(new
CoLatitude)

All these are derived from the standard sine and cosine rules of
trigonometry; I may have made some mistakes as I did the derivation in
my head.

Paul Cooper

http://www.meridianworlddata.com/Distance-Calculation.asp
http://www.movable-type.co.uk/scripts/LatLong.html
http://mathforum.org/library/drmath/view/51816.html

Also look at Ed Williams' wonderful collection of solutions to problems
in spherical trigonometry:

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