mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-12-22 04:21:51 +03:00
224 lines
9.7 KiB
PHP
224 lines
9.7 KiB
PHP
<?php
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namespace Nominatim;
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class ReverseGeocode
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{
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protected $oDB;
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protected $iMaxRank = 28;
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public function __construct(&$oDB)
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{
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$this->oDB =& $oDB;
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}
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public function setZoom($iZoom)
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{
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// Zoom to rank, this could probably be calculated but a lookup gives fine control
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$aZoomRank = array(
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0 => 2, // Continent / Sea
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1 => 2,
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2 => 2,
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3 => 4, // Country
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4 => 4,
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5 => 8, // State
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6 => 10, // Region
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7 => 10,
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8 => 12, // County
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9 => 12,
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10 => 17, // City
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11 => 17,
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12 => 18, // Town / Village
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13 => 18,
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14 => 22, // Suburb
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15 => 22,
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16 => 26, // Street, TODO: major street?
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17 => 26,
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18 => 30, // or >, Building
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19 => 30, // or >, Building
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);
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$this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28;
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}
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/**
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* Find the closest interpolation with the given search diameter.
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*
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* @param string $sPointSQL Reverse geocoding point as SQL
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* @param float $fSearchDiam Search diameter
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*
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* @return Record of the interpolation or null.
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*/
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protected function lookupInterpolation($sPointSQL, $fSearchDiam)
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{
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$sSQL = 'SELECT place_id, parent_place_id, 30 as rank_search,';
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$sSQL .= ' ST_LineLocatePoint(linegeo,'.$sPointSQL.') as fraction';
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$sSQL .= ' , ST_Distance(linegeo,'.$sPointSQL.') as distance';
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$sSQL .= ' FROM location_property_osmline';
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')';
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$sSQL .= ' and indexed_status = 0 and startnumber is not NULL ';
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$sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1';
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return chksql(
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$this->oDB->getRow($sSQL),
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"Could not determine closest housenumber on an osm interpolation line."
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);
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}
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/* lookup()
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* returns { place_id =>, type => '(osm|tiger)' }
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* fails if no place was found
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*/
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public function lookup($fLat, $fLon, $bDoInterpolation = true)
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{
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$sPointSQL = 'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)';
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$iMaxRank = $this->iMaxRank;
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// Find the nearest point
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$fSearchDiam = 0.0004;
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$iPlaceID = null;
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$fMaxAreaDistance = 1;
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$bIsInUnitedStates = false;
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$bPlaceIsTiger = false;
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$bPlaceIsLine = false;
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while (!$iPlaceID && $fSearchDiam < $fMaxAreaDistance) {
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$fSearchDiam = $fSearchDiam * 2;
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// If we have to expand the search area by a large amount then we need a larger feature
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// then there is a limit to how small the feature should be
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if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
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if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
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if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
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if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
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if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
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if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
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if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22;
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if ($fSearchDiam > 0.001 && $iMaxRank > 26) {
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// try with interpolations before continuing
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if ($bDoInterpolation) {
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// no house found, try with interpolations
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$aPlaceLine = $this->lookupInterpolation($sPointSQL, $fSearchDiam/2);
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if ($aPlaceLine) {
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// interpolation is closer to point than placex house
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$bPlaceIsLine = true;
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$aPlace = $aPlaceLine;
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$iPlaceID = $aPlaceLine['place_id'];
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$iParentPlaceID = $aPlaceLine['parent_place_id']; // the street
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$fFraction = $aPlaceLine['fraction'];
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$iMaxRank = 30;
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break;
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}
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}
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// no interpolation found, continue search
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$iMaxRank = 26;
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}
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$sSQL = 'select place_id,parent_place_id,rank_search,country_code';
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$sSQL .= ' FROM placex';
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
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$sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank;
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$sSQL .= ' and (name is not null or housenumber is not null)';
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$sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
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$sSQL .= ' and indexed_status = 0 ';
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$sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
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$sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))';
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$sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
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if (CONST_Debug) var_dump($sSQL);
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$aPlace = chksql(
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$this->oDB->getRow($sSQL),
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"Could not determine closest place."
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);
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$iPlaceID = $aPlace['place_id'];
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$iParentPlaceID = $aPlace['parent_place_id'];
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$bIsInUnitedStates = ($aPlace['country_code'] == 'us');
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}
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// If a house was found make sure there isn't an interpolation line
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// that is closer
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if ($bDoInterpolation && !$bPlaceIsLine && $aPlace && $aPlace['rank_search'] == 30) {
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// get the distance of the house to the search point
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$sSQL = 'SELECT ST_distance('.$sPointSQL.', house.geometry)';
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$sSQL .= ' FROM placex as house WHERE house.place_id='.$iPlaceID;
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$fDistancePlacex = chksql(
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$this->oDB->getOne($sSQL),
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"Could not determine distance between searched point and placex house."
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);
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// look for an interpolation that is closer
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$aPlaceLine = $this->lookupInterpolation($sPointSQL, $fDistancePlacex);
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if ($aPlaceLine && (float) $aPlaceLine['distance'] < (float) $fDistancePlacex) {
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// interpolation is closer to point than placex house
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$bPlaceIsLine = true;
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$aPlace = $aPlaceLine;
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$iPlaceID = $aPlaceLine['place_id'];
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$iParentPlaceID = $aPlaceLine['parent_place_id']; // the street
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$fFraction = $aPlaceLine['fraction'];
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}
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}
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// Only street found? If it's in the US we can check TIGER data for nearest housenumber
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if (CONST_Use_US_Tiger_Data && $bDoInterpolation && $bIsInUnitedStates && $this->iMaxRank >= 28 && $iPlaceID && ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27 )) {
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$fSearchDiam = 0.001;
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$sSQL = 'SELECT place_id,parent_place_id,30 as rank_search, ST_LineLocatePoint(linegeo,'.$sPointSQL.') as fraction';
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//if (CONST_Debug) { $sSQL .= ', housenumber, ST_distance('.$sPointSQL.', centroid) as distance, st_y(centroid) as lat, st_x(centroid) as lon'; }
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$sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$iPlaceID;
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$sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')'; //no centroid anymore in Tiger data, now we have lines
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$sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1';
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if (CONST_Debug) {
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$sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL);
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var_dump($sSQL);
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$aAllHouses = chksql($this->oDB->getAll($sSQL));
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foreach ($aAllHouses as $i) {
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echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
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}
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}
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$aPlaceTiger = chksql(
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$this->oDB->getRow($sSQL),
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"Could not determine closest Tiger place."
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);
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if ($aPlaceTiger) {
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if (CONST_Debug) var_dump('found Tiger housenumber', $aPlaceTiger);
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$bPlaceIsTiger = true;
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$aPlace = $aPlaceTiger;
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$iPlaceID = $aPlaceTiger['place_id'];
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$iParentPlaceID = $aPlaceTiger['parent_place_id']; // the street
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$fFraction = $aPlaceTiger['fraction'];
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$iMaxRank = 30;
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}
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}
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// The point we found might be too small - use the address to find what it is a child of
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if ($iPlaceID && $iMaxRank < 28) {
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if (($aPlace['rank_search'] > 28 || $bPlaceIsTiger || $bPlaceIsLine) && $iParentPlaceID) {
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$iPlaceID = $iParentPlaceID;
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$bPlaceIsLine = false;
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$bPlaceIsTiger = false;
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}
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$sSQL = 'select address_place_id';
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$sSQL .= ' FROM place_addressline';
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$sSQL .= " WHERE place_id = $iPlaceID";
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$sSQL .= " ORDER BY abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc";
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$sSQL .= ' LIMIT 1';
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$iPlaceID = chksql($this->oDB->getOne($sSQL), "Could not get parent for place.");
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if (!$iPlaceID) {
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$iPlaceID = $aPlace['place_id'];
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}
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}
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return array(
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'place_id' => $iPlaceID,
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'type' => $bPlaceIsTiger ? 'tiger' : ($bPlaceIsLine ? 'interpolation' : 'osm'),
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'fraction' => ($bPlaceIsTiger || $bPlaceIsLine) ? $fFraction : -1
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);
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}
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}
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