Selon Phil Scadden <p.scad...@gns.cri.nz>: > > > I have a *lat, lon* coordinate with a known projection system I assume > > it a initial point. I want to generate a next Position with the an > > *angle* with (horizontal/vertical) and *bearing length* in lat,lon > > coordinates and complete it with angles and bearing lengths to form a > > polygon > > Try http://www.movable-type.co.uk/scripts/latlong.html#destPoint > > > However, you need to be very careful with this as calculations are being > done assuming a spherical earth. Fine is distances arent large enough > for the ellipsoidal effects to affect accuracy. For large distances, you > need to use Vincent' s_formula - > http://en.wikipedia.org/wiki/Vincenty%27s_formulae which require iteration.
http://geographiclib.sourceforge.net/ has an implementation of it. > > > Notice: This email and any attachments are confidential. > If received in error please destroy and immediately notify us. > Do not copy or disclose the contents. > > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev