In order to simplify multipolygons in CGAL, including their shared boundaries, I followed the instructions as answered in my previous question.
So, I start out with polygons, but iterate through the polygons and add their coordinates to a boost::adjacency_list graph of edges. Then, I run CGAL::split_graph_into_polylines() on the graph. Then, I simplify the polylines (Polyline_2) by creating a CT object, store the polylines in there, then run CGAL::simplify(). After the simplification, however, how would I go about converting the resulting polylines to polygons (Polygon_2)? Ultimately, I would like to convert these simplified polylines to polygons so that I can export them as GeoJSON files.
Thank you!