/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jtsexample.linearref;
import org.locationtech.jts.geom.*;
import org.locationtech.jts.io.*;
import org.locationtech.jts.linearref.*;
/**
* Examples of Linear Referencing
*
* @version 1.7
*/
public class LinearRefExample {
static GeometryFactory fact = new GeometryFactory();
static WKTReader rdr = new WKTReader(fact);
public static void main(String[] args)
throws Exception
{
LinearRefExample example = new LinearRefExample();
example.run();
}
public LinearRefExample() {
}
public void run()
throws Exception
{
runExtractedLine("LINESTRING (0 0, 10 10, 20 20)", 1, 10);
runExtractedLine("MULTILINESTRING ((0 0, 10 10), (20 20, 25 25, 30 40))", 1, 20);
}
public void runExtractedLine(String wkt, double start, double end)
throws ParseException
{
System.out.println("=========================");
Geometry g1 = rdr.read(wkt);
System.out.println("Input Geometry: " + g1);
System.out.println("Indices to extract: " + start + " " + end);
LengthIndexedLine indexedLine = new LengthIndexedLine(g1);
Geometry subLine = indexedLine.extractLine(start, end);
System.out.println("Extracted Line: " + subLine);
double[] index = indexedLine.indicesOf(subLine);
System.out.println("Indices of extracted line: " + index[0] + " " + index[1]);
Coordinate midpt = indexedLine.extractPoint((index[0] + index[1]) / 2);
System.out.println("Midpoint of extracted line: " + midpt);
}
}