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php Programming Glossary: lng2php mysql compare long and lat, return ones under 10 miles http://stackoverflow.com/questions/2296824/php-mysql-compare-long-and-lat-return-ones-under-10-miles returns a rounded value function distance lat1 lng1 lat2 lng2 pi80 M_PI 180 lat1 pi80 lng1 pi80 lat2 pi80 lng2 pi80 r 6372.797.. lng1 lat2 lng2 pi80 M_PI 180 lat1 pi80 lng1 pi80 lat2 pi80 lng2 pi80 r 6372.797 mean radius of Earth in km dlat lat2 lat1 dlng.. r 6372.797 mean radius of Earth in km dlat lat2 lat1 dlng lng2 lng1 a sin dlat 2 sin dlat 2 cos lat1 cos lat2 sin dlng 2 sin..
Finding towns within a 10 mile radius of postcode. Google maps API http://stackoverflow.com/questions/8135243/finding-towns-within-a-10-mile-radius-of-postcode-google-maps-api code public static function getDistance lat1 lng1 lat2 lng2 unit 'km' radius of earth @note the earth is not perfectly spherical.. float lat1 lng1 deg2rad float lng1 lat2 deg2rad float lat2 lng2 deg2rad float lng2 great circle distance formula return radius.. float lng1 lat2 deg2rad float lat2 lng2 deg2rad float lng2 great circle distance formula return radius acos sin lat1 sin..
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