private Geometry toNullOrGeometry(String wellKnownText) throws ParseException {
if (wellKnownText == null) {
return null;
}
GeometryFactory fact = new GeometryFactory(pm, 0);
WKTReader wktRdr = new WKTReader(fact);
return wktRdr.read(wellKnownText);
}
public void initGeometry() throws ParseException {
GeometryFactory fact = new GeometryFactory(pm, 0);
WKTReader wktRdr = new WKTReader(fact);
if (geom[0] != null) {
return;
}
if (wkta != null) {
geom[0] = wktRdr.read(wkta);
}
if (wktb != null) {
geom[1] = wktRdr.read(wktb);
}
}
public void run() throws ParseException {
GeometryFactory fact = new GeometryFactory();
WKTReader wktRdr = new WKTReader(fact);
String wktA = "POLYGON((40 100, 40 20, 120 20, 120 100, 40 100))";
String wktB = "LINESTRING(20 80, 80 60, 100 140)";
Geometry A = wktRdr.read(wktA);
Geometry B = wktRdr.read(wktB);
Geometry C = A.intersection(B);
System.out.println("A = " + A);
System.out.println("B = " + B);
System.out.println("A intersection B = " + C);
System.out.println("A relate C = " + A.relate(B));
}
void checkTransformation(String geomStr)
throws IOException, ParseException, NoninvertibleTransformationException {
Geometry geom = rdr.read(geomStr);
AffineTransformation trans = AffineTransformation.rotationInstance(Math.PI / 2);
AffineTransformation inv = trans.getInverse();
Geometry transGeom = (Geometry) geom.clone();
transGeom.apply(trans);
// System.out.println(transGeom);
transGeom.apply(inv);
// check if transformed geometry is equal to original
boolean isEqual = geom.equalsExact(transGeom, 0.0005);
assertTrue(isEqual);
}
public void findClosestPoint(String wktA, String wktB) {
System.out.println("-------------------------------------");
try {
Geometry A = wktRdr.read(wktA);
Geometry B = wktRdr.read(wktB);
System.out.println("Geometry A: " + A);
System.out.println("Geometry B: " + B);
DistanceOp distOp = new DistanceOp(A, B);
double distance = distOp.distance();
System.out.println("Distance = " + distance);
Coordinate[] closestPt = distOp.nearestPoints();
LineString closestPtLine = fact.createLineString(closestPt);
System.out.println(
"Closest points: " + closestPtLine + " (distance = " + closestPtLine.getLength() + ")");
} catch (Exception ex) {
ex.printStackTrace();
}
}