function getlocations_earth_longitude_range in Get Locations 7.2

Same name and namespace in other branches

1. 7 getlocations.module \getlocations_earth_longitude_range()

This function uses earth_asin_safe so is not accurate for all possible parameter combinations. This means this function doesn't work properly for high distance values. This function needs to be re-written to work properly for larger distance values. See http://drupal.org/node/821628

http://drupal.org/node/471040 provides a fix, this has been applied here.

5 calls to getlocations_earth_longitude_range()

getlocations_fields_handler_argument_distance::query in modules/getlocations_fields/handlers/getlocations_fields_handler_argument_distance.inc

Set up the query for this argument.

getlocations_fields_handler_filter_distance::query in modules/getlocations_fields/handlers/getlocations_fields_handler_filter_distance.inc

Add this filter to the query.

getlocations_js_settings_do in ./getlocations.module

Function sets up javascript settings

getlocations_leaflet_map_settings_do in modules/getlocations_leaflet/getlocations_leaflet.module

getlocations_search_info_sql in modules/getlocations_search/getlocations_search.module

File

./getlocations.module, line 5889

getlocations.module @author Bob Hutchinson http://drupal.org/user/52366 @copyright GNU GPL

Code

function getlocations_earth_longitude_range($latitude, $longitude, $distance) {

  // Estimate the min and max longitudes within $distance of a given location.
  if (!$distance > 0) {
    $distance = 1;
  }
  $long = deg2rad($longitude);
  $lat = deg2rad($latitude);
  $radius = getlocations_earth_radius($latitude) * cos($lat);
  if ($radius > 0) {
    $angle = abs($distance / $radius);
    $angle = min($angle, pi());
  }
  else {
    $angle = pi();
  }
  $minlong = $long - $angle;
  $maxlong = $long + $angle;
  if ($minlong < -pi()) {
    $minlong = $minlong + pi() * 2;
  }
  if ($maxlong > pi()) {
    $maxlong = $maxlong - pi() * 2;
  }
  return array(
    rad2deg($minlong),
    rad2deg($maxlong),
  );
}