[Proj] triaxial ellipsoid

[Aleksander Yanovskiy]

Thank you both Charles and Jean-Marc for your work!
The visualizations at http://geographiclib.sourceforge.net/1.29/triaxial.html are really helpfull for understanding the material. Could you please advise me some free software to generate the figures with another initial conditions ?

Aleksander

09.01.2013, 19:53, "Charles Karney" <charles.karney at sri.com>:
> On 2012-10-17 11:25, Aleksander Yanovskiy wrote:
>
>>  Greetings!
>>
>>  Could you please suggest me a software library that can calculate distances on the surface of the triaxial Earth ellipsoid ?
>
> Jean-Marc Baillard has coded up Jacobi's solution for geodesics on a
> triaxial ellipsoid for an HP-41 calculator, see
>
>    http://hp41programs.yolasite.com/geod3axial.php
>
> I've also written up some notes on the problem which may be of interest
>
>    http://geographiclib.sourceforge.net/1.29/triaxial.html
>
> Disclaimer: A triaxial ellipsoid approximates the earth only slightly
> better than an ellipsoid of revolution. If you are really considering
> measuring distances on the earth using a triaxial ellipsoid, you should
> also be worrying about the shape of the geoid (which essentially makes
> the geodesic problem a hopeless mess).