lib/ReverseGeocode.php

   1 <?php
   2         class ReverseGeocode
   3         {
   4                 protected $oDB;
   5
   6                 protected $fLat;
   7                 protected $fLon;
   8                 protected $iMaxRank = 28;
   9
  10                 protected $aLangPrefOrder = array();
  11
  12                 protected $bIncludePolygonAsPoints = false;
  13                 protected $bIncludePolygonAsText = false;
  14                 protected $bIncludePolygonAsGeoJSON = false;
  15                 protected $bIncludePolygonAsKML = false;
  16                 protected $bIncludePolygonAsSVG = false;
  17                 protected $fPolygonSimplificationThreshold = 0.0;
  18
  19
  20                 function ReverseGeocode(&$oDB)
  21                 {
  22                         $this->oDB =& $oDB;
  23                 }
  24
  25                 function setLanguagePreference($aLangPref)
  26                 {
  27                         $this->aLangPrefOrder = $aLangPref;
  28                 }
  29
  30                 function setLatLon($fLat, $fLon)
  31                 {
  32                         $this->fLat = (float)$fLat;
  33                         $this->fLon = (float)$fLon;
  34                 }
  35
  36                 function setRank($iRank)
  37                 {
  38                         $this->iMaxRank = $iRank;
  39                 }
  40
  41                 function setZoom($iZoom)
  42                 {
  43                         // Zoom to rank, this could probably be calculated but a lookup gives fine control
  44                         $aZoomRank = array(
  45                                 0 => 2, // Continent / Sea
  46                                 1 => 2,
  47                                 2 => 2,
  48                                 3 => 4, // Country
  49                                 4 => 4,
  50                                 5 => 8, // State
  51                                 6 => 10, // Region
  52                                 7 => 10,
  53                                 8 => 12, // County
  54                                 9 => 12,
  55                                 10 => 17, // City
  56                                 11 => 17,
  57                                 12 => 18, // Town / Village
  58                                 13 => 18,
  59                                 14 => 22, // Suburb
  60                                 15 => 22,
  61                                 16 => 26, // Street, TODO: major street?
  62                                 17 => 26,
  63                                 18 => 30, // or >, Building
  64                                 19 => 30, // or >, Building
  65                                 );
  66                         $this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28;
  67                 }
  68
  69                                 function setIncludePolygonAsPoints($b = true)
  70                 {
  71                         $this->bIncludePolygonAsPoints = $b;
  72                 }
  73
  74                 function getIncludePolygonAsPoints()
  75                 {
  76                         return $this->bIncludePolygonAsPoints;
  77                 }
  78
  79                 function setIncludePolygonAsText($b = true)
  80                 {
  81                         $this->bIncludePolygonAsText = $b;
  82                 }
  83
  84                 function getIncludePolygonAsText()
  85                 {
  86                         return $this->bIncludePolygonAsText;
  87                 }
  88
  89                 function setIncludePolygonAsGeoJSON($b = true)
  90                 {
  91                         $this->bIncludePolygonAsGeoJSON = $b;
  92                 }
  93
  94                 function setIncludePolygonAsKML($b = true)
  95                 {
  96                         $this->bIncludePolygonAsKML = $b;
  97                 }
  98
  99                 function setIncludePolygonAsSVG($b = true)
 100                 {
 101                         $this->bIncludePolygonAsSVG = $b;
 102                 }
 103
 104                 function setPolygonSimplificationThreshold($f)
 105                 {
 106                         $this->fPolygonSimplificationThreshold = $f;
 107                 }
 108
 109                 // returns { place_id =>, type => '(osm|tiger)' }
 110                 // fails if no place was found
 111                 function lookup()
 112                 {
 113                         $sPointSQL = 'ST_SetSRID(ST_Point('.$this->fLon.','.$this->fLat.'),4326)';
 114                         $iMaxRank = $this->iMaxRank;
 115                         $iMaxRank_orig = $this->iMaxRank;
 116
 117                         // Find the nearest point
 118                         $fSearchDiam = 0.0004;
 119                         $iPlaceID = null;
 120                         $aArea = false;
 121                         $fMaxAreaDistance = 1;
 122                         $bIsInUnitedStates = false;
 123                         $bPlaceIsTiger = false;
 124                         while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance)
 125                         {
 126                                 $fSearchDiam = $fSearchDiam * 2;
 127
 128                                 // If we have to expand the search area by a large amount then we need a larger feature
 129                                 // then there is a limit to how small the feature should be
 130                                 if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
 131                                 if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
 132                                 if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
 133                                 if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
 134                                 if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
 135                                 if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
 136                                 if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22;
 137                                 if ($fSearchDiam > 0.001 && $iMaxRank > 26) $iMaxRank = 26;
 138
 139                                 $sSQL = 'select place_id,parent_place_id,rank_search,calculated_country_code';
 140                                 $sSQL .= ' FROM placex';
 141                                 $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
 142                                 $sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank;
 143                                 $sSQL .= ' and (name is not null or housenumber is not null)';
 144                                 $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
 145                                 $sSQL .= ' and indexed_status = 0 ';
 146                                 $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
 147                                 $sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))';
 148                                 $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
 149                                 if (CONST_Debug) var_dump($sSQL);
 150                                 $aPlace = $this->oDB->getRow($sSQL);
 151                                 if (PEAR::IsError($aPlace))
 152                                 {
 153                                         failInternalError("Could not determine closest place.", $sSQL, $aPlace);
 154                                 }
 155                                 $iPlaceID = $aPlace['place_id'];
 156                                 $iParentPlaceID = $aPlace['parent_place_id'];
 157                                 $bIsInUnitedStates = ($aPlace['calculated_country_code'] == 'us');
 158                         }
 159
 160                         // Only street found? If it's in the US we can check TIGER data for nearest housenumber
 161                         if ($bIsInUnitedStates && $iMaxRank_orig >= 28 && $iPlaceID && ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27 ))
 162                         {
 163                                 $fSearchDiam = 0.001;
 164                                 $sSQL = 'SELECT place_id,parent_place_id,30 as rank_search ';
 165                                 if (CONST_Debug) { $sSQL .= ', housenumber, ST_distance('.$sPointSQL.', centroid) as distance, st_y(centroid) as lat, st_x(centroid) as lon'; }
 166                                 $sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$iPlaceID;
 167                                 $sSQL .= ' AND ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.')';
 168                                 $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', centroid) ASC limit 1';
 169
 170
 171                                 // print all house numbers in the parent (street)
 172                                 if (CONST_Debug)
 173                                 {
 174                                         $sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL);
 175                                         var_dump($sSQL);
 176
 177                                         $aAllHouses = $this->oDB->getAll($sSQL);
 178                                         foreach($aAllHouses as $i)
 179                                         {
 180                                                 echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
 181                                         }
 182                                 }
 183
 184                                 $aPlaceTiger = $this->oDB->getRow($sSQL);
 185                                 if (PEAR::IsError($aPlace))
 186                                 {
 187                                         failInternalError("Could not determine closest Tiger place.", $sSQL, $aPlaceTiger);
 188                                 }
 189                                 if ($aPlaceTiger)
 190                                 {
 191                                         if (CONST_Debug) var_dump('found Tiger place', $aPlaceTiger);
 192                                         $bPlaceIsTiger = true;
 193                                         $aPlace = $aPlaceTiger;
 194                                         $iPlaceID = $aPlaceTiger['place_id'];
 195                                         $iParentPlaceID = $aPlaceTiger['parent_place_id']; // the street
 196                                 }
 197                         }
 198
 199                         // The point we found might be too small - use the address to find what it is a child of
 200                         if ($iPlaceID && $iMaxRank < 28)
 201                         {
 202                                 if ($aPlace['rank_search'] > 28 && $iParentPlaceID && !$bPlaceIsTiger)
 203                                 {
 204                                         $iPlaceID = $iParentPlaceID;
 205                                 }
 206                                 $sSQL  = 'select address_place_id';
 207                                 $sSQL .= ' FROM place_addressline';
 208                                 $sSQL .= " WHERE place_id = $iPlaceID";
 209                                 $sSQL .= " ORDER BY abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc";
 210                                 $sSQL .= ' LIMIT 1';
 211                                 $iPlaceID = $this->oDB->getOne($sSQL);
 212                                 if (PEAR::IsError($iPlaceID))
 213                                 {
 214                                         failInternalError("Could not get parent for place.", $sSQL, $iPlaceID);
 215                                 }
 216                                 if (!$iPlaceID)
 217                                 {
 218                                         $iPlaceID = $aPlace['place_id'];
 219                                 }
 220                         }
 221
 222                         return array('place_id' => $iPlaceID,
 223                                      'type' => $bPlaceIsTiger ? 'tiger' : 'osm');
 224                 }
 225
 226         }
 227 ?>