# [postgis-users] Determine latitude/longitude of a point giveninitial latitude/longitude, bearing and distance on a spheroid.

Colin Broughton broughton.colin at gmail.com
Mon Nov 8 22:37:31 PST 2010

```Also, Geoscience Australia provides an online Great-Circle distance
calculator which is very easy to use:
http://www.ga.gov.au/geodesy/datums/distance.jsp#circle

Colin

On 9 November 2010 10:16, Jorge Gustavo Rocha <jgr at di.uminho.pt> wrote:

> Luke,
>
> Maybe you can find useful information on:
> http://trac.osgeo.org/proj/wiki/GeodesicCalculations
>
> Regards,
>
> Jorge
>
> --
> Jorge Gustavo Rocha
> Departamento de Informática
> Universidade do Minho
> 4710-057 Braga
> Tel: 253604430 (Geral), 253604479 (Gabinete)
> Fax: 253604471
> Móvel: 910333888
>
>
>
> Ter, 2010-11-09 às 00:22 +0930, Luke Wilmen escreveu:
> > G'day all,
> > Long time reader, first time poster. Recently I have been developing a
> > project that is requiring a point to be translated along a great
> > circle path by a given distance (metres) and initial bearing. I have
> > already implemented functions that do this with normal spherical
> > calculations based upon an average radius for the Earth. These
> > spherical calculations work fine when you are close to the equator
> > however the accuracy is outside the tolerances for our project as you
> > move further towards the poles (points drift by upwards of 10m - 20m).
> >
> >
> > After pouring over the Internet and this mailing list I have been
> > unable to find any solution for achieving these calculations on a
> > spheroid/ellipsoid and am wondering if anyone else has had any success
> > in this area or would be able to offer some advice?
> >
> >
> > Regards,
> > Luke.
> > _______________________________________________
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> > postgis-users at postgis.refractions.net
> > http://postgis.refractions.net/mailman/listinfo/postgis-users
>
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