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 <giulian...@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 :-) > > > > > > > > > > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer >
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