website/reverse.php

   1 <?php
   2         @define('CONST_ConnectionBucket_PageType', 'Reverse');
   3
   4         require_once(dirname(dirname(__FILE__)).'/lib/init-website.php');
   5         require_once(CONST_BasePath.'/lib/log.php');
   6
   7     if (preg_match(CONST_BlockedUserAgents, $_SERVER["HTTP_USER_AGENT"]) > 0)
   8     {
   9         $fLoadAvg = getLoadAverage();
  10         if ($fLoadAvg >= CONST_BlockReverseMaxLoad) {
  11             header('HTTP/1.0 403 Forbidden');
  12             header('Content-type: text/html; charset=utf-8');
  13                 echo "<html><body><h1>App temporarily blocked</h1>";
  14             echo "Your application has been temporarily blocked from the OpenStreetMap Nominatim ";
  15             echo "geolocation service due to high server load.";
  16             echo "\n</body></html>\n";
  17             exit;
  18         }
  19
  20     }
  21
  22
  23         if (strpos(CONST_BulkUserIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false)
  24         {
  25                 $fLoadAvg = getLoadAverage();
  26                 if ($fLoadAvg > 2) sleep(60);
  27                 if ($fLoadAvg > 4) sleep(120);
  28                 if ($fLoadAvg > 6)
  29                 {
  30                         echo "Bulk User: Temporary block due to high server load\n";
  31                         exit;
  32                 }
  33         }
  34
  35         $oDB =& getDB();
  36         ini_set('memory_limit', '200M');
  37
  38         // Format for output
  39         $sOutputFormat = 'xml';
  40         if (isset($_GET['format']) && ($_GET['format'] == 'xml' || $_GET['format'] == 'json' || $_GET['format'] == 'jsonv2'))
  41         {
  42                 $sOutputFormat = $_GET['format'];
  43         }
  44
  45         // Show address breakdown
  46         $bShowAddressDetails = true;
  47         if (isset($_GET['addressdetails'])) $bShowAddressDetails = (bool)$_GET['addressdetails'];
  48
  49         // Preferred language
  50         $aLangPrefOrder = getPreferredLanguages();
  51         $sLanguagePrefArraySQL = "ARRAY[".join(',',array_map("getDBQuoted",$aLangPrefOrder))."]";
  52
  53         $hLog = logStart($oDB, 'reverse', $_SERVER['QUERY_STRING'], $aLangPrefOrder);
  54
  55         if (isset($_GET['osm_type']) && isset($_GET['osm_id']) && (int)$_GET['osm_id'] && ($_GET['osm_type'] == 'N' || $_GET['osm_type'] == 'W' || $_GET['osm_type'] == 'R'))
  56         {
  57                 $iPlaceID = $oDB->getOne("select place_id from placex where osm_type = '".$_GET['osm_type']."' and osm_id = ".(int)$_GET['osm_id']." order by type = 'postcode' asc");
  58                 if (!$iPlaceID) $sError = 'OSM ID Not Found';
  59         }
  60         else
  61         {
  62                 // Location to look up
  63                 $fLat = (float)$_GET['lat'];
  64                 $fLon = (float)$_GET['lon'];
  65                 $sPointSQL = "ST_SetSRID(ST_Point($fLon,$fLat),4326)";
  66
  67                 // Zoom to rank, this could probably be calculated but a lookup gives fine control
  68                 $aZoomRank = array(
  69                         0 => 2, // Continent / Sea
  70                         1 => 2,
  71                         2 => 2,
  72                         3 => 4, // Country
  73                         4 => 4,
  74                         5 => 8, // State
  75                         6 => 10, // Region
  76                         7 => 10,
  77                         8 => 12, // County
  78                         9 => 12,
  79                         10 => 17, // City
  80                         11 => 17,
  81                         12 => 18, // Town / Village
  82                         13 => 18,
  83                         14 => 22, // Suburb
  84                         15 => 22,
  85                         16 => 26, // Street, TODO: major street?
  86                         17 => 26,
  87                         18 => 30, // or >, Building
  88                         19 => 30, // or >, Building
  89                         );
  90                 $iMaxRank = (isset($_GET['zoom']) && isset($aZoomRank[$_GET['zoom']]))?$aZoomRank[$_GET['zoom']]:28;
  91
  92                 // Find the nearest point
  93                 $fSearchDiam = 0.0001;
  94                 $iPlaceID = null;
  95                 $aArea = false;
  96                 $fMaxAreaDistance = 1;
  97                 while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance)
  98                 {
  99                         $fSearchDiam = $fSearchDiam * 2;
 100
 101                         // If we have to expand the search area by a large amount then we need a larger feature
 102                         // then there is a limit to how small the feature should be
 103                         if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
 104                         if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
 105                         if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
 106                         if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
 107                         if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
 108                         if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
 109                         if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22;
 110                         if ($fSearchDiam > 0.001 && $iMaxRank > 26) $iMaxRank = 26;
 111
 112                         $sSQL = 'select place_id,parent_place_id,rank_search from placex';
 113                         $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
 114                         $sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank;
 115                         $sSQL .= ' and (name is not null or housenumber is not null)';
 116                         $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\')';
 117                         $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
 118                         $sSQL .= ' OR ST_DWithin('.$sPointSQL.', ST_Centroid(geometry), '.$fSearchDiam.'))';
 119                         $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
 120 //var_dump($sSQL);
 121                         $aPlace = $oDB->getRow($sSQL);
 122                         if (PEAR::IsError($aPlace))
 123                         {
 124                                 failInternalError("Could not determine closest place.", $sSQL, $iPlaceID);
 125                         }
 126                         $iPlaceID = $aPlace['place_id'];
 127                         $iParentPlaceID = $aPlace['parent_place_id'];
 128                 }
 129
 130                 // The point we found might be too small - use the address to find what it is a child of
 131                 if ($iPlaceID && $iMaxRank < 28)
 132                 {
 133                         if ($aPlace['rank_search'] > 28 && $iParentPlaceID) {
 134                                 $iPlaceID = $iParentPlaceID;
 135                         }
 136                         $sSQL = "select address_place_id from place_addressline where place_id = $iPlaceID order by abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc limit 1";
 137                         $iPlaceID = $oDB->getOne($sSQL);
 138                         if (PEAR::IsError($iPlaceID))
 139                         {
 140                                 failInternalError("Could not get parent for place.", $sSQL, $iPlaceID);
 141                         }
 142                         if (!$iPlaceID)
 143                         {
 144                                 $iPlaceID = $aPlace['place_id'];
 145                         }
 146                 }
 147         }
 148
 149         if ($iPlaceID)
 150         {
 151                 $sSQL = "select placex.*,";
 152                 $sSQL .= " get_address_by_language(place_id, $sLanguagePrefArraySQL) as langaddress,";
 153                 $sSQL .= " get_name_by_language(name, $sLanguagePrefArraySQL) as placename,";
 154                 $sSQL .= " get_name_by_language(name, ARRAY['ref']) as ref,";
 155                 $sSQL .= " st_y(st_centroid(geometry)) as lat, st_x(st_centroid(geometry)) as lon";
 156                 $sSQL .= " from placex where place_id = $iPlaceID ";
 157 //var_dump($sSQL);
 158                 $aPlace = $oDB->getRow($sSQL);
 159
 160                 if ($bShowAddressDetails)
 161                 {
 162                         $aAddress = getAddressDetails($oDB, $sLanguagePrefArraySQL, $iPlaceID, $aPlace['country_code']);
 163                 }
 164                 $aClassType = getClassTypes();
 165                 $sAddressType = '';
 166                 $sClassType = $aPlace['class'].':'.$aPlace['type'].':'.$aPlace['admin_level'];
 167                 if (isset($aClassType[$sClassType]) && isset($aClassType[$sClassType]['simplelabel']))
 168                 {
 169                         $sAddressType = $aClassType[$aClassType]['simplelabel'];
 170                 }
 171                 else
 172                 {
 173                         $sClassType = $aPlace['class'].':'.$aPlace['type'];
 174                         if (isset($aClassType[$sClassType]) && isset($aClassType[$sClassType]['simplelabel']))
 175                                 $sAddressType = $aClassType[$sClassType]['simplelabel'];
 176                         else $sAddressType = $aPlace['class'];
 177                 }
 178                 $aPlace['addresstype'] = $sAddressType;
 179
 180         }
 181         include(CONST_BasePath.'/lib/template/address-'.$sOutputFormat.'.php');