Hi @davorink 

Do you have any sample data to share us?

Thanks in Advance,

Danilo

Try DonutBridgeBuillder + Deaggregator.

well, it’s difficult without the data. my first thoughts:

• get the hole with the donutextractor, then get the CenterPoint

for the angle of the cut:

• get the centerline of the objects
• filter out the straight lines (delete the arcs)
• get the longest line
• get the angle of the line and add 90 degrees

for the length of the cut:

• get the outer limits of the object (boundarybox)
• calculate the crossing points of the line with the boundarybox (or “endless” lentgh)

the cut:

• LineOnAreaOverlay

but not tested!

A slightly different approach:

• Create a rotated boundary box of the original polygon, and obtain its width and rotation angle with a BoundingBoxReplacer
• Get the coordinates of the center point of the hole with a DonutHoleExtractor and a CenterPointExtractor
• Add these coordinates to the rotated bounding box with a FeatureMerger
• Create the cutting line using the coordinates of the center point, the width and rotation angle of the rotated bounding box, and some math
• Cut the original polygon with the cutting line

In the whole process group by some unique ID of the input polygons.

yeah, that’s a much easier way, thanks @geomancer 

I forgot the rotated BoundingBox. Interesting point of your workbench is, that the LineOnAreaOverlay doesn’t need a line as input. It seems, two vertex are also possible. Didn’t know that.

Actually my workbench does create a line. The first VertexCreator creates a point feature, the second VertexCreator adds a second point to that feature, turning it into a line feature.