PROJ/test/unit/proj_angular_io_test.cpp, branch backport-3082-to-9.0

code format fix [skip ci]

2020-04-14T10:51:13+00:00

Add proj_degree_input() and proj_degree_output()

2020-04-12T10:20:44+00:00

Equivalent to proj_angular_input() and proj_angular_output() but
checking for degree units instead. proj_create_crs_to_crs() rarely, if
ever, returns pipelines that has radians as input or output so using
proj_angular_*() is not a useful check for io units of pipelines.

These two new functions should make life a bit easier for users that
generally store there angular coordinates in radians.

Closes #2027

ISO19111: remove PROJ.5 specific format for CRS (refs #1214)

2019-01-08T20:25:07+00:00

As discussed in https://github.com/OSGeo/proj.4/issues/1214#issuecomment-452084720,
the introduction of a new PROJ.5 format to export CRS using pipeline/unitconvert/axisswap
as an attempt of improving the PROJ.4 format used by GDAL and other products is
likely a dead-end since it is still lossy in many aspects and can cause confusion
with coodinate operations.

Consequently the PROJ_5 convention will be identical to PROJ_4 for CRS export.

Note: on the import side, I've kept the code that could parse unitconvert and
axisswap when building a CRS definition from a pipeline. It is there as a hidden
feature as it was kind of a tear to remove that code in case it might still be
useful...

Replace PJ_IO_UNITS_WHATEVER with units from neighbour steps

2019-01-04T13:02:06+00:00

With this commit we make sure that proj_angular_input() and
proj_angular_output return the correct result for any given pipeline.