geoDistance_km [1008304]

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JavaX fragment (include)

static double geoDistance_km(double lat1, double long1, double lat2, double long2) {
  double _eQuatorialEarthRadius = 6371;
  double _d2r = (Math.PI / 180D);
  double dlong = (long2 - long1) * _d2r;
  double dlat = (lat2 - lat1) * _d2r;
  double a = Math.pow(Math.sin(dlat / 2D), 2D) + Math.cos(lat1 * _d2r) * Math.cos(lat2 * _d2r)
          * Math.pow(Math.sin(dlong / 2D), 2D);
  double c = 2D * Math.atan2(Math.sqrt(a), Math.sqrt(1D - a));
  double d = _eQuatorialEarthRadius * c;
  return d;
}

Author comment

Began life as a copy of #1008302

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Snippet ID:

#1008304

Snippet name:

geoDistance_km

Eternal ID of this version:

#1008304/5

Text MD5:

3e6f43bea96bb819138ceb8fb808b70c

Author:

stefan

Category:

javax / math

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2017-05-07 01:38:58

Source code size:

508 bytes / 11 lines

Pitched / IR pitched:

No / No

Views / Downloads:

620 / 589

Version history:

4 change(s)

Referenced in:

[show references]

1	static double geoDistance_km(double lat1, double long1, double lat2, double long2) {
2	double _eQuatorialEarthRadius = 6371;
3	double _d2r = (Math.PI / 180D);
4	double dlong = (long2 - long1) * _d2r;
5	double dlat = (lat2 - lat1) * _d2r;
6	double a = Math.pow(Math.sin(dlat / 2D), 2D) + Math.cos(lat1 * _d2r) * Math.cos(lat2 * _d2r)
7	* Math.pow(Math.sin(dlong / 2D), 2D);
8	double c = 2D * Math.atan2(Math.sqrt(a), Math.sqrt(1D - a));
9	double d = _eQuatorialEarthRadius * c;
10	return d;
11	}