createOperations(): do not attempt using a unrelated datum intermediate when doing geog2D<-->geog3D conversions of same datum #1427
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…te when doing geog2D<-->geog3D conversions of same datum Seen when testing transformations between "CR 05" (EPSG:5365) and "CR-SIRGAS" (EPSG:8907) which require going through their corresponding 3D GeogCRS to find a Helmert transformation.
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Fixes OSGeo#1427 Credit to OSS Fuzz
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Actually it turns that this case shouldn't happen in practice as the current entry in the EPSG database is bogus ( https://lists.osgeo.org/pipermail/proj/2019-April/008459.html ), but it is good that PROJ is able to be tolerant about such cases |
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Seen when testing transformations between "CR 05" (EPSG:5365) and "CR-SIRGAS" (EPSG:8907)
which require going through their corresponding 3D GeogCRS to find a Helmert
transformation.