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As on import of EPSG, we remove the supersession of Canadian NTv1 file w.r.t NTv2
(because the default behaviour of PROJ is to ignore superseded operations). However
the NTv1 operation is advertized with an accuracy of 1m, whereas NTv2 is advertized
with 1.5m. Consequently on areas where both files are valid, and if both files are
available, NTv1 would be selected. So as a workaround, worsen the NTv1 accuracy to
2m so that NTv2 is used in priority.
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alternatives, to select the operation with best accuracy
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- Tests should use unified diff with expected results
- Show CMake build compile commands (VERBOSE=1)
- Travis CI only has two cores, so "-j2" is sufficent
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All other tests use PROJ_LIB, and allow it to be overridden from the
command-line, so do the same here.
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until proj_trans() is called (fixes #1229)
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