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add great circle distance calc

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oblonski 2014-11-28 10:30:06 +01:00
parent 600e29f353
commit 5d0a962e24
3 changed files with 105 additions and 7 deletions
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55
jsprit-core/src/main/java/jsprit/core/util/GreatCircleDistanceCalculator.java Normal file
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@ -0,0 +1,55 @@
/*******************************************************************************
* Copyright (C) 2014 Stefan Schroeder
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package jsprit.core.util;
/**
* Created by schroeder on 28.11.14.
*/
public class GreatCircleDistanceCalculator {
private static final double R = 6372.8; // km
/**
* Harversine method.
*
* double lon1 = coord1.getX();
* double lon2 = coord2.getX();
* double lat1 = coord1.getY();
* double lat2 = coord2.getY();
*
* @param coord1 - from coord
* @param coord2 - to coord
* @return great circle distance
*/
public static double calculateDistance(Coordinate coord1, Coordinate coord2){
double lon1 = coord1.getX();
double lon2 = coord2.getX();
double lat1 = coord1.getY();
double lat2 = coord2.getY();
double delta_Lat = Math.toRadians(lat2 - lat1);
double delta_Lon = Math.toRadians(lon2 - lon1);
lat1 = Math.toRadians(lat1);
lat2 = Math.toRadians(lat2);
double a = Math.sin(delta_Lat / 2) * Math.sin(delta_Lat / 2) + Math.sin(delta_Lon / 2) * Math.sin(delta_Lon / 2) * Math.cos(lat1) * Math.cos(lat2);
double c = 2 * Math.asin(Math.sqrt(a));
return R * c;
}
}

13
jsprit-core/src/main/java/jsprit/core/util/ManhattanDistanceCalculator.java
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@ -1,16 +1,16 @@
/*******************************************************************************
* Copyright (C) 2013 Stefan Schroeder
*
* Copyright (C) 2014 Stefan Schroeder
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
@ -21,9 +21,8 @@ package jsprit.core.util;
public class ManhattanDistanceCalculator {
public static double calculateDistance(Coordinate coord1, Coordinate coord2) {
double distance = Math.abs(coord1.getX() - coord2.getX())
return Math.abs(coord1.getX() - coord2.getX())
+ Math.abs(coord1.getY() - coord2.getY());
return distance;
}
}

44
jsprit-core/src/test/java/jsprit/core/util/GreatCircleDistanceCalculatorTest.java Normal file
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@ -0,0 +1,44 @@
/*******************************************************************************
* Copyright (C) 2014 Stefan Schroeder
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package jsprit.core.util;
import junit.framework.Assert;
import org.junit.Test;
/**
* Created by schroeder on 28.11.14.
*/
public class GreatCircleDistanceCalculatorTest {
@Test
public void test(){
double lon1 = 8.3858333;
double lat1 = 49.0047222;
double lon2 = 12.1333333;
double lat2 = 54.0833333;
double greatCircle = GreatCircleDistanceCalculator.calculateDistance(
Coordinate.newInstance(lon1,lat1),
Coordinate.newInstance(lon2,lat2)
);
Assert.assertEquals(600,greatCircle,30.);
}
}