[Qgis-developer] spherical trigonometry

[Geo DrinX]

Hi  Giuliano,

I think this link can be useful :

https://code.google.com/p/gpsbabel/source/browse/trunk/gpsbabel/jeeps/gpsmath.cc?r=4619

expecially in  "GPS_Math_LatLonH_To_XYZ"  and the reverse
"GPS_Math_XYX_To_LatLonH"    functions.

... also if is C++  source code  :(


Regards

Roberto


2014-06-09 0:12 GMT+02:00 giulianc51 <giulianc51 at gmail.com>:

> hi all,
>
> I'm studying for my own amusement, and with the aim of deepening
> coordinate transformations, the spherical trigonometry;
>
> I'm building a tool to display the different configurations of
> spherical models: point in spherical and / or Cartesian coordinates,
> vectors, great and small circles, arcs, triangles, etc..
>
> I follow in this study the text of I.Todhunter and J.G.Leathem,
> Spherical Trigonometry, McMillan, London 1914
>
> I think, at the end of the path, turn it into a plugin for QGIS
> so that it can facilitate the use in the educational environment;
>
> the code so far available (in standalone version) is published on
>         github.com/giulianc/stalt4qgis;
>
> all the advices, contributions and criticisms are welcome;
>
>
> t.i.a., best regards, sfmbe(*),
> giuliano
>
>
> (*) sorry for my bad english :-)
>
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