Created
April 9, 2012 04:18
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Calculate distance between 2 cllocation
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| #define DEG_TO_RAD 0.017453292519943295769236907684886 | |
| #define EARTH_RADIUS 6372797.560856 | |
| // return distance between two lat/lon points, in meters | |
| double DistanceBetweenCoords(double fromLat, double fromLong, double toLat, | |
| double toLong) | |
| { | |
| double latitudeArc = (fromLat - toLat) * DEG_TO_RAD; | |
| double longitudeArc = (fromLong - toLong) * DEG_TO_RAD; | |
| double latitudeH = sin(latitudeArc * 0.5); | |
| latitudeH *= latitudeH; | |
| double lontitudeH = sin(longitudeArc * 0.5); | |
| lontitudeH *= lontitudeH; | |
| double tmp = cos(fromLat*DEG_TO_RAD) * cos(toLat*DEG_TO_RAD); | |
| return 2.0 * asin(sqrt(latitudeH + tmp*lontitudeH)) * EARTH_RADIUS; | |
| } |
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