Thread: Converting Longitude/Latitude/Altitude to Cartesian Coords

Hi,

I want to convert Longitude/Latitude/Altitude coordinates of a point to x,y,z coordinates. Can anybody point to some mathematical formulae to do the same?

Actually, I have some 3D models in Google Earth's .KMZ format; all vertices stored in GE format are in Longitude/Lat./Alt. coordinate system, and I want them in cartesian coordinates.

Thanks a lot in advance.