Show a warning when untwine fails

wonder-sk commented 3 years ago

Trying to load a file from Helsinki dataset: https://kartta.hel.fi/helshares/Laserkeilausaineistot/Pintamalli/2017_LAZ/rgb_673496c.laz

Untwine fails with the following error written in console:

untwine fatal error: writers.las: Unable to convert scaled value (2549659868) to int32 for dimension 'X' when writing LAS/LAZ file /home/martin/tmp/las/fi-helsinki/ept_rgb_673496c/ept-data/4-2-2-2.laz.

But user has no idea things went wrong - the layer appears as if it was loaded correctly, but nothing works (no attributes etc.). We should:

create a warning/error in the qgis message bar with the full error message from untwine
possibly show a warning indicator in the qgis layer tree

wonder-sk commented 3 years ago

Upstream untwine ticket to fix the underlying issue: https://github.com/hobu/untwine/issues/46

wonder-sk commented 3 years ago

Upstream untwine ticket to allow reporting of errors: https://github.com/hobu/untwine/issues/54

wonder-sk / point-cloud-experiments

Show a warning when untwine fails #73