osmcoastline_filter not outputting anti-meridian lines

[tickerBerkin]

I was hoping that all natural=coastline lines from planet would be saved but anti-meridian lines appear to be discarded by the filter. Trying to use coastlines-split-4326 (or even planet > osmcoastline_filter) to locate some coastline problems is made more difficult because I can't test that coastlines in OSM make valid land polygons.

Could osmcoastline be changed discard them on input and osmcoastline_filter be changed to keep them.

[joto]

osmcoastline_filter gets all ways tagged natural=coastline and all nodes needed by those lines. It doesn't look at any other tags. If that's not the behaviour you want use the tags-filter command from osmium to build the filter you want.

[tickerBerkin]

In coastline_polygons.cpp, function add_segments_to_line, there are 2 bits of logic:
// segments along southern edge of the map are not added to line output
// segments along antimeridian are not added to line output

[joto]

Yes, and coastline_polygons.cpp is part of osmcoastline not of osmcoastline_filter.

Can you describe what you are trying to do in the end? Not what you want osmcoastline to do, but what is it that you are trying to use it for?