Re: [Qgis-developer] spherical trigonometry
Il giorno Tue, 10 Jun 2014 12:31:19 +0200 Geo DrinX geodr...@gmail.com ha scritto: Hi Giuliano, Hi Roberto, 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_LatLonHfunctions. thank you very much for the info :-) in fact, the transformation from geographic coordinates to geocentric coordinates are well-documented in the literature (EPSG Guide 7, many documents of US DMA and ACoE as TEC-SR-7); Take note that the software that you have indicated is related to the ellipsoidal field, while I'm working in the spherical field :-) Regards Roberto many thanks, best regards, giuliano PS: (a scanso di castronerie che avrò messo nella 'versione' inglese :-) ciao Roberto, grazie dell'informazione; comunque la documentazione su trasformazione fra coordinate geografiche - coordinate geocentriche è diffusa in letteratura, ad es. su molti testi, anche quelli che ho indicato sopra; nota inoltre che il software che hai segnalato opera in ambito ellissoidico, mentre io sto operando in campo sferico; comunque grazie infinite; ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] spherical trigonometry
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_LatLonHfunctions. ... 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 ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] spherical trigonometry
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
