How to split a polygon with a line?

[valvarezf]

I tried several methods:

.- OverlayNG::overlay DIFFERENCE
.- intersection and then add intersection and polygon to a polygonizer
.- symdifference / difference
.- intersection and then difference / symdifference
.- intersection and then EnhancedPrecisionOp::difference / EnhancedPrecisionOp::symdifference
.- intersection and then add intersection and polygon to a geomcollection and then use polygonizer

Can someone help me?

[dbaston]

This functionality isn't currently provided directly by GEOS. A common method is to union the splitting line with the boundary of the polygon, then polygonize the result. #1101 contains links to a few implementations of this.