I wrote a custom module to perform a search of an index I created using Search API and Search API Solr Search. The search is a proximity search that finds the closest locations using a bounding box, but I can’t figure out how to SORT the results I get back by the closest. Here is my module code in entirety:

<?php  function s_test() {    $index      = search_api_index_load("articles");   $query      = new SearchApiQuery($index);    $lat        = 41.920110;   $lon        = -87.680433;    //get min/max lat and long   $check_radius = 25; // radius of bounding circle in miles   $earth_radius = 3960;  // earth's mean radius, miles    // first-cut bounding box (in degrees)   $max_lat = $lat + rad2deg($check_radius/$earth_radius);   $min_lat = $lat - rad2deg($check_radius/$earth_radius);    // compensate for degrees longitude getting smaller with increasing latitude   $max_lon = $lon + rad2deg($check_radius/$earth_radius/cos(deg2rad($lat)));   $min_lon = $lon - rad2deg($check_radius/$earth_radius/cos(deg2rad($lat)));    // set the bounding box   $filter = $query->createFilter('AND');   $filter->condition('latitude', $max_lat, '<=');   $filter->condition('latitude', $min_lat, '>=');   $filter->condition('longitude', $max_lon, '<=');   $filter->condition('longitude', $min_lon, '>=');   $query->filter($filter);    // run query   $data       = $query->execute();   $results    = $data['results'];    print_r($results); }  function s_index() {   $index      = search_api_index_load("articles");    $index->reindex();   search_api_index_items($index);   print '<pre>';   print_r($index);   print '</pre>'; }  function test_query_menu() {   //create the search page   $items['test-search'] = array(     'title' => t('Search'),     'page callback' => 's_test',     'access callback' => TRUE,     'type' => MENU_NORMAL_ITEM   );   //create a re-index page   $items['test-index'] = array(     'title' => t('Index'),     'page callback' => 's_index',     'access callback' => TRUE,     'type' => MENU_NORMAL_ITEM   );   return $items; }  /**  * Implements hook_entity_property_info_alter().  */ function test_query_entity_property_info_alter(&$info) {   $info['node']['properties']['latitude'] = array(     'type' => 'decimal',     'label' => t('Latitude'),     'sanitized' => TRUE,     'getter callback' => 'test_query_search_api_property_latitude_getter_callback',   );   $info['node']['properties']['longitude'] = array(     'type' => 'decimal',     'label' => t('Longitude'),     'sanitized' => TRUE,     'getter callback' => 'test_query_search_api_property_longitude_getter_callback',   );   $info['node']['properties']['latlongpair'] = array(     'type' => 'string',     'label' => t('LatLong Pair'),     'sanitized' => TRUE,     'getter callback' => 'test_query_search_api_property_latlongpair_getter_callback',   );   $info['node']['properties']['logo_uri'] = array(     'type' => 'string',     'label' => t('LOGO URI'),     'sanitized' => TRUE,     'getter callback' => 'test_query_search_api_property_logo_uri_getter_callback',   ); }  /**  * Getter callback for latitude.  */ function test_query_search_api_property_latitude_getter_callback($item) {   return $item->field_address[LANGUAGE_NONE][0]['latitude'];  }  /**  * Getter callback for longitude.  */ function test_query_search_api_property_longitude_getter_callback($item) {   return $item->field_address[LANGUAGE_NONE][0]['longitude'];  }  /**  * Getter callback for latitude/longitude pair.  */ function test_query_search_api_property_latlongpair_getter_callback($item) {   return $item->field_address[LANGUAGE_NONE][0]['latitude'] . ',' . $item->field_address[LANGUAGE_NONE][0]['longitude'];  }  /**  * Getter callback for logo uri.  */ function test_query_search_api_property_logo_uri_getter_callback($item) {   return $item->field_image[LANGUAGE_NONE][0]['uri'];  } 

Basically I exposed my latitude and longitude to Solr and used those to set the bounding box and this works find to return results close to me, but I don’t see any field in the results set that would allow me to sort by the node with the closest location.

I also tried installing the Search API Location module, but I still can’t find anything in the results set to sort by.

I’m using Location and Location CCK module to get the lat/long.

If anyone has experience/insight with this that would be groovy.