Hi WanMil, WanMil wrote
1. RoundCoordsFilter creates an invalid polygon with hole 2. PolygonSplitterFilter might split the polygon because it is too
large. It converts the polygon to a java.awt.geom.Area object, splits it into two halves and converts it back in the method PolygonSplitterBase.areaToShapes(..) method. This method does not check the orientation of the returned polygons and therefore converts the hole to same type the polygon has - in other words the hole is removed.
I thought about this again and I think it might be the solution for the mp-cut problem: We don't have to cut out inner polygons, instead we can connect each inner polygon with the outer one. We have to find two points: p1, a point on the outer way that is close to a point of the inner polygon, which is then called p2. Now, we have to split the outer way at p1, draw a line to p2, add the points of the inner polygon, and draw a way back from p2 to p1. It works (QLandkarte shows the polygon with a hole), but only when none of the filters destroys the added ways between p1 and p2. I don't know yet how multiple nested polygons look like, but I think it is a promising approach. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/shapes-with-holes-tp5745424.html Sent from the Mkgmap Development mailing list archive at Nabble.com.