Le lundi 10 novembre 2014 18:37:53, Jed O. Kaplan a écrit : > Dear GDAL developers, > > I would like to resurrect this thread from a couple of years ago regarding > GDAL support for the Quadrilateralized Spherical Cube (QSC) projection in > GDAL. > > Now that the QSC projection is supported by proj4 and works well, would it > be possible to have the projection fully supported in GDAL, i.e., > identifiable in a WKT string? > > The QSC projection has many potential uses whenever working with global > data and would be a valuable additional feature for GDAL.
Jed, I've committed Martin Lambers' patch from 13/07/2012 with the modification I suggested, i.e. add _ instead of space in #define SRS_PT_QSC "Quadrilateralized_Spherical_Cube" Even > > Thanks in advance for your help! > > Best regards, > > Jed Kaplan > > On Fri, 13 Jul 2012 12:01:21 +0200, Even Rouault wrote: > > > I could certainly do that, but with the '+wktext' mechanism, there > > > is no reason to add this patch anymore, is there? > > > > Your patch is a cleaner solution than the +wktext mechanism, which > > remains something a bit hacky (although I must admit I had never > > heard before of that QSC projection ! and it is probably some niche > > projection). The advantage of having it properly recognized is that > > you can then embed its WKT representation in a .aux.xml file and all > > tools using GDAL will be able to deal properly with it. > > Yes, QSC is very limited in scope and absolutely not widely used. It is > a perfect fit for my use case (planetary-scale terrain rendering using > quadtree hierarchies for data management), but I'm not sure it is worth > adding general support for it to GDAL. For me, the '+wktext' solution > already works fine since the transformation of data to the quadtree > hierarchies is typically one way only: the resulting files are only > ever used by the renderer. > > > But reading again your initial email, I didn't realize that it is not > > yet supported in proj, only proposed. So we will wait for it to be > > committed in PROJ first before committing its support in GDAL. > > OK, if QSC is accepted into PROJ and full support for it in GDAL is > considered worthwhile, I can update the patch and create a ticket. > > Best regards > Martin > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
