Hi,
As to get the CRS of a Polygon.
public static void main(String[] args) {
try {
GeometryFactory geometryFactory =
JTSFactoryFinder.getGeometryFactory( null );
WKTReader reader = new WKTReader( geometryFactory );
Polygon polygon = (Polygon) reader.read("POLYGON((-72.0 -8.0, "
+
"-71.0 -8.0, "
+
"-71.0 -9.0, "
+
"-72.0 -9.0, "
+
"-72.0
-8.0))");
System.out.println("Polígono = " + polygon.getArea() + " / " +
polygon.getLength() + " / " + polygon.getNumPoints() + " / " +
polygon.getNumGeometries() + " / " + polygon.getDimension());
System.out.println(polygon.getBoundary().within(polygon));
System.out.println(polygon.getBoundary().intersects(polygon));
System.out.println(polygon.getGeometryType() +
"---------------------------");
CoordinateReferenceSystem sourceCRS = CRS.decode(here CRS of
polygon);
CoordinateReferenceSystem targetCRS = CRS.decode(here SAD69
Coordinate Reference System "GCS_South_American_1969");
MathTransform transform = CRS.findMathTransform(sourceCRS,
targetCRS);
Geometry targetGeometry = JTS.transform(polygon.getBoundary(),
transform);
System.out.println(targetGeometry.getCoordinates());
// ReprojectPolygonDemo rpd = new ReprojectPolygonDemo();
// rpd.demo(9);
System.out.println("");
} catch (TransformException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null,
ex);
} catch (NoSuchAuthorityCodeException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null,
ex);
} catch (FactoryException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null,
ex);
} catch (MismatchedDimensionException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null,
ex);
} catch (ParseException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null,
ex);
}
}
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