website/reverse.php

   1 <?php
   2
   3         require_once('.htlib/init.php');
   4
   5         if (strpos(CONST_BulkUserIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false)
   6         {
   7                 $fLoadAvg = getLoadAverage();
   8                 if ($fLoadAvg > 2) sleep(60);
   9                 if ($fLoadAvg > 4) sleep(120);
  10                 if ($fLoadAvg > 6)
  11                 {
  12                         echo "Bulk User: Temporary block due to high server load\n";
  13                         exit;
  14                 }
  15         }
  16
  17         ini_set('memory_limit', '200M');
  18
  19         // Format for output
  20         $sOutputFormat = 'xml';
  21         if (isset($_GET['format']) && ($_GET['format'] == 'xml' || $_GET['format'] == 'json'))
  22         {
  23                 $sOutputFormat = $_GET['format'];
  24         }
  25
  26         // Prefered language
  27         $aLangPrefOrder = getPrefferedLangauges();
  28         $sLanguagePrefArraySQL = "ARRAY[".join(',',array_map("getDBQuoted",$aLangPrefOrder))."]";
  29
  30         $hLog = logStart($oDB, 'reverse', $_SERVER['QUERY_STRING'], $aLangPrefOrder);
  31
  32         if (isset($_GET['osm_type']) && isset($_GET['osm_id']) && (int)$_GET['osm_id'] && ($_GET['osm_type'] == 'N' || $_GET['osm_type'] == 'W' || $_GET['osm_type'] == 'R'))
  33         {
  34                 $iPlaceID = $oDB->getOne("select place_id from placex where osm_type = '".$_GET['osm_type']."' and osm_id = ".(int)$_GET['osm_id']." order by type = 'postcode' asc");
  35                 if (!$iPlaceID) $sError = 'OSM ID Not Found';
  36         }
  37         else
  38         {
  39                 // Location to look up
  40                 $fLat = (float)$_GET['lat'];
  41                 $fLon = (float)$_GET['lon'];
  42                 $sPointSQL = "ST_SetSRID(ST_Point($fLon,$fLat),4326)";
  43
  44                 // Zoom to rank, this could probably be calculated but a lookup gives fine control
  45                 $aZoomRank = array(
  46                         0 => 2, // Continent / Sea
  47                         1 => 2,
  48                         2 => 2,
  49                         3 => 4, // Country
  50                         4 => 4,
  51                         5 => 8, // State
  52                         6 => 10, // Region
  53                         7 => 10,
  54                         8 => 12, // County
  55                         9 => 12,
  56                         10 => 17, // City
  57                         11 => 17,
  58                         12 => 18, // Town / Village
  59                         13 => 18,
  60                         14 => 22, // Suburb
  61                         15 => 22,
  62                         16 => 26, // Street, TODO: major street?
  63                         17 => 26,
  64                         18 => 28, // or >, Building
  65                         19 => 30, // or >, Building
  66                         );
  67                 $iMaxRank = isset($aZoomRank[$_GET['zoom']])?$aZoomRank[$_GET['zoom']]:28;
  68
  69                 // Find the nearest point
  70                 $fSearchDiam = 0.0001;
  71                 $iPlaceID = null;
  72                 $aArea = false;
  73                 $fMaxAreaDistance = 10;
  74                 while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance)
  75                 {
  76                         $fSearchDiam = $fSearchDiam * 2;
  77
  78                         // If we have to expand the search area by a large amount then we need a larger feature
  79                         // then there is a limit to how small the feature should be
  80                         if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
  81                         if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
  82                         if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
  83                         if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
  84                         if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
  85                         if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
  86                         if ($fSearchDiam > 0.01 && $iMaxRank > 22) $iMaxRank = 22;
  87
  88                         if ($iMaxRank >= 26)
  89                         {
  90                                 // Street level search is done using placex table
  91                                 $sSQL = 'select place_id from placex';
  92                                 $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
  93                                 $sSQL .= ' and rank_search >= 26 and rank_search <= '.$iMaxRank;
  94                                 $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
  95                                 $sSQL .= ' OR ST_DWithin('.$sPointSQL.', ST_Centroid(geometry), '.$fSearchDiam.'))';
  96                                 $sSQL .= ' ORDER BY rank_search desc, ST_distance('.$sPointSQL.', geometry) ASC limit 1';
  97                                 $iPlaceID = $oDB->getOne($sSQL);
  98                                 if (PEAR::IsError($iPlaceID))
  99                                 {
 100                                         var_Dump($sSQL, $iPlaceID);
 101                                         exit;
 102                                 }
 103                         }
 104                         else
 105                         {
 106                                 // Other search uses the location_point and location_area tables
 107
 108                                 // If we've not yet done the area search do it now
 109                                 if ($aArea === false)
 110                                 {
 111                                         $sSQL = 'select place_id,rank_address,ST_distance('.$sPointSQL.', centroid) as distance from location_area';
 112                                         $sSQL .= ' WHERE ST_Contains(area,'.$sPointSQL.') and rank_search <= '.$iMaxRank;
 113                                         $sSQL .= ' ORDER BY rank_address desc, ST_distance('.$sPointSQL.', centroid) ASC limit 1';
 114                                         $aArea = $oDB->getRow($sSQL);
 115                                         if ($aArea) $fMaxAreaDistance = $aArea['distance'];
 116                                 }
 117
 118                                 // Different search depending if we found an area match
 119                                 if ($aArea)
 120                                 {
 121                                         // Found best match area - is there a better point match?
 122                                         $sSQL = 'select place_id from location_point_'.($iMaxRank+1);
 123                                         $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.') ';
 124                                         $sSQL .= ' and rank_search > '.($aArea['rank_address']+3);
 125                                         $sSQL .= ' ORDER BY rank_address desc, ST_distance('.$sPointSQL.', centroid) ASC limit 1';
 126                                         $iPlaceID = $oDB->getOne($sSQL);
 127                                         if (PEAR::IsError($iPlaceID))
 128                                         {
 129                                                 var_Dump($sSQL, $iPlaceID);
 130                                                 exit;
 131                                         }
 132                                 }
 133                                 else
 134                                 {
 135                                         $sSQL = 'select place_id from location_point_'.($iMaxRank+1);
 136                                         $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.') ';
 137                                         $sSQL .= ' ORDER BY rank_address desc, ST_distance('.$sPointSQL.', centroid) ASC limit 1';
 138                                         $iPlaceID = $oDB->getOne($sSQL);
 139                                         if (PEAR::IsError($iPlaceID))
 140                                         {
 141                                                 var_Dump($sSQL, $iPlaceID);
 142                                                 exit;
 143                                         }
 144                                 }
 145                         }
 146                 }
 147                 if (!$iPlaceID && $aArea) $iPlaceID = $aArea['place_id'];
 148         }
 149
 150         if ($iPlaceID)
 151         {
 152                 $sSQL = "select placex.*,";
 153                 $sSQL .= " get_address_by_language(place_id, $sLanguagePrefArraySQL) as langaddress,";
 154                 $sSQL .= " get_name_by_language(name, $sLanguagePrefArraySQL) as placename,";
 155                 $sSQL .= " get_name_by_language(name, ARRAY['ref']) as ref";
 156                 $sSQL .= " from placex where place_id = $iPlaceID ";
 157                 $aPlace = $oDB->getRow($sSQL);
 158
 159                 $aAddress = getAddressDetails($oDB, $sLanguagePrefArraySQL, $iPlaceID, $aPlace['country_code']);
 160         }
 161         include('.htlib/output/address-'.$sOutputFormat.'.php');