Re: [gdal-dev] Generating Lat, long Cordinates with bearing line and angle
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
Re: [gdal-dev] Generating Lat, long Cordinates with bearing line and angle
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. 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
