id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12294	boost::geometry::union_ empty result	phelippeneveu@…	Barend Gehrels	union_() sometimes return an empty result. It seems like there is a bug with union_() if some vertices are too close to each other. I inspected the polygons and they seem to be valid (no self intersections). I created a SHP file and WTK file with a few problematic polygons. The polygons are in pairs, and if you call union_() on each pair, the result will be empty.	Bugs	new	To Be Determined	geometry	Boost 1.61.0	Problem