I came to the conclusion that the first patch only tries to covers a shortcoming of the LineClipper. I started a small investigation and observed the following problems of the LineClipper: * Lines are split when two subsequent coordinates are equal * In case a line is closed it's quite probable that two unconnected lines are returned by the LineClipper * The clip algorithm seems to be a bit inefficient because it does not check the common case first if both coordinates are within the bounding box The patch fixes all described problems. The code in the SeaGenerator the joins the ways after the bounding box clipping can be removed because of the LineClipper fixes. @Steve: Can you have a short look on the patch? The LineClipper was committed by you so it might be good to have a small code review. WanMil
The patch removes artefacts from the LineClipper that might cause floodings.
WanMil