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@jjimenezshaw This brings CRS using the Local Orthographic method, now documented in the latest IOGP guidance note 7-2 page 100, but I didn't go as far as implementing it. At first sight, it looks like a modification of +proj=ortho with 2 new parameters (scale factor and azimuth), so perhaps can be implemented in src/projection/ortho.cpp (and a new mapping will need to be added in src/iso19111/operations/parammappings.cpp to map between WKT method & params and PROJ strings), but I didn't check further
@kbevers This references new GTG grids related to GR96. (EPSG change requests suggest that you're behind that)