website/reverse.php

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