Java Utililty Methods Distance Calculate

List of utility methods to do Distance Calculate

  1. HOME
  2. Java
  3. D
  4. Distance Calculate

Description

The list of methods to do Distance Calculate are organized into topic(s).

Method

DoublecomputeDistanceInMiles(Double lat1, Double lon1, Double lat2, Double lon2)
computes the APPROXIMATE distance between 2 points (lat/lon in DEGREES, not radians) forumula described here: http://www.meridianworlddata.com/Distance-Calculation.asp 
double x = 69.1 * (lat2 - lat1);
double y = 53.0 * (lon2 - lon1) * Math.cos(lat1 / 57.3);
return Math.sqrt(x * x + y * y);
int[][]computeDistanceMap(int[][] image)
compute Distance Map 
for (int y = 0; y < image.length; y++) {
    for (int x = 0; x < image[y].length; x++) {
        if (image[y][x] != 0) {
            image[y][x] = 0;
        } else {
            image[y][x] = image.length + image[y].length;
            if (y > 0)
                image[y][x] = Math.min(image[y][x], image[y - 1][x] + 1);
...
doublecomputeDistanceSqr(double t, double b1, double b2, double b3, double b4, double b5, double b6)
Computes the numerator of d^2 for a given value of t 
double s = 2 * t / (1 + t * t);
double c = (1 - t * t) / (1 + t * t);
return b1 * s * s + b2 * c * c + b3 * s * c + b4 * s + b5 * c + b6;
doublecomputeDistanceUsingRadians(double lat1Radians, double lng1Radians, double lat2Radians, double lng2Radians)
Returns the distance in meters between ( lat1 , lng1 ) and ( lat2 , lng2 ). 
final double dLat = lat2Radians - lat1Radians;
final double dLng = lng2Radians - lng1Radians;
final double a = haversin(dLat) + Math.cos(lat1Radians) * Math.cos(lat2Radians) * haversin(dLng);
return EARTH_RADIUS * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
doubledist(double lat1, double long1, double lat2, double long2)
distance between two coordinates in kilometers 
final double d2r = Math.PI / 180.0;
final double dlong = (long2 - long1) * d2r;
final double dlat = (lat2 - lat1) * d2r;
final double a = Math.pow(Math.sin(dlat / 2.0), 2.0)
        + Math.cos(lat1 * d2r) * Math.cos(lat2 * d2r) * Math.pow(Math.sin(dlong / 2.0), 2.0);
final double c = 2.0 * Math.atan2(Math.sqrt(a), Math.sqrt(1.0 - a));
final double d = 6367.0 * c;
return d;
...
doubledist(double x1, double y1, double z1, double x2, double y2, double z2)
dist 
return sqrt(distSq(x1, y1, z1, x2, y2, z2));
doubledist(final double x0, final double y0, final double x1, final double y1)
Returns the distance between two points in a dual axis cartesian graph. 
final double dx = Math.abs(x1 - x0);
final double dy = Math.abs(y1 - y0);
return (Math.sqrt((dx * dx) + (dy * dy)));
floatdist(float x1, float y1, float x2, float y2)
dist 
return sqrt(sq(x2 - x1) + sq(y2 - y1));
floatdist(float x1, float y1, float x2, float y2)
dist 
double x = x2 - x1;
double y = y2 - y1;
return (float) Math.sqrt((x * x) + (y * y));
floatdist(float x1, float y1, float x2, float y2)
dist 
final float x = (x2 - x1);
final float y = (y2 - y1);
return (float) Math.sqrt(x * x + y * y);