/** * make sure outer ring is CCW and holes are CW for all the polygons in the Geometry * * @param mp set of polygons to check */ MultiPolygon makeGoodSHAPEMultiPolygon(MultiPolygon mp) { MultiPolygon result; Polygon[] ps = new Polygon[mp.getNumGeometries()]; // check each sub-polygon for (int t = 0; t < mp.getNumGeometries(); t++) { ps[t] = makeGoodSHAPEPolygon((Polygon) mp.getGeometryN(t)); } result = new MultiPolygon(ps, new PrecisionModel(), 0); return result; }
public Geobuf.Data.Geometry multiPolyToGeobuf(MultiPolygon poly) { Geobuf.Data.Geometry.Builder builder = Geobuf.Data.Geometry.newBuilder().setType(Geobuf.Data.Geometry.Type.MULTIPOLYGON); // first we specify the number of polygons builder.addLengths(poly.getNumGeometries()); for (int i = 0; i < poly.getNumGeometries(); i++) { Polygon p = (Polygon) poly.getGeometryN(i); // how many rings there are builder.addLengths(p.getNumInteriorRing() + 1); Stream<LineString> interiorRings = IntStream.range(0, p.getNumInteriorRing()).<LineString>mapToObj(p::getInteriorRingN); Stream.concat(Stream.of(p.getExteriorRing()), interiorRings) .forEach(r -> addRing(r, builder)); } return builder.build(); }