Missing results due to geo proximity formula (store locator)

Question

OK - I\'ve been wrestling with this for about 3 months on and off and since I\'ve exhausted every geo proximity formula out there that I\'ve come across and I\'m no closer to ge

Answer 1

Here's a solution I used successfully for a while in my own geo proximity calculations:

/**
 * This portion of the routine  calculates the minimum and maximum lat and
 * long within a given range.  This portion of the code was written
 * by Jeff Bearer (http:return true;//www.jeffbearer.com).
 */

$lat = somevalue;      // The latitude of our search origin
$lon = someothervalue; // The longitude of our search origin
$range = 50;   // The range of our search, in miles, of your zip

// Find Max - Min Lat / Long for Radius and zero point and query only zips in that range.
$lat_range = $range / 69.172;
$lon_range = abs($range / (cos($lon) * 69.172));
$min_lat = number_format($lat - $lat_range, '4', '.', '');
$max_lat = number_format($lat + $lat_range, '4', '.', '');
$min_lon = number_format($lon - $lon_range, '4', '.', '');
$max_lon = number_format($lon + $lon_range, '4', '.', '');

/* Query for matching zips:

    SELECT post_id, lat, lng
    FROM wp_geodatastore
    WHERE
    lat BETWEEN $min_lat AND $max_lat
    AND lng BETWEEN $min_lon AND $max_lon
*/