Hi I am trying to create a Compound CRS with a DERIVEDPROJCRS and a VERTCRS, but I get an exception in C++:
"components of the compound CRS do not belong to one of the allowed combinations of http://docs.opengeospatial.org/as/18-005r4/18-005r4.html#34"; In that documentation, "Coordinate reference systems that are combined are required to not contain any duplicate or redundant axes. Valid combinations shall be the following." I would expect that "c) Projected 2D + Vertical." were also valid for a derived projected. Looking at the figure 9: UML diagram — Coordinate Reference Systems package you can see that "DerivedGeographicCRS" is a "GeographicCRS", and "DerivedVerticalCRS" is a "VerticalCRS". However "DerivedProjectedCRS" contains a "ProjectedCRS". I guess the reason for that difference is that "ProjectedCRS" is already a "DerivedCRS", and they do not want to have multiple inheritance. Makes sense. However it produces a strong limitation: cannot use a derived Projected in a compound. Would it make sense to allow also a DerivedProjectedCRS in CompoundCRS::create (and I guess also in CompoundCRS::createLax)? Thanks, Javier .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ Entre dos pensamientos racionales hay infinitos pensamientos irracionales.
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