img: Support reading UTM zone & datum from PLT
commit510d336bdb9fdfe7704398673c2597b9163b2356
authorOlly Betts <olly@survex.com>
Fri, 16 Feb 2024 02:45:14 +0000 (16 15:45 +1300)
committerOlly Betts <olly@survex.com>
Fri, 16 Feb 2024 02:45:14 +0000 (16 15:45 +1300)
treec4a830cab16f5ed0f832e20a877f6281fba842e8
parent6e7206907e1984bdf650a43e896da632cdd53e21
img: Support reading UTM zone & datum from PLT

Currently only datum "WGS 1984" is supported - if a different
datum is specified then we ignore the UTM zone and datum information
as before.

If the file specifies more than one datum or more than one zone
then we ignore this information as we'd need to re-project some
of the coordinates, which would require making PROJ a dependency.
src/img.c
tests/multisection.dump
tests/multisection.plt