mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-12-26 06:22:13 +03:00
30511fd3ab
The NearPoint is actually common to all SearchDescriptions and there is other context data as well. like viewbox, that needs to be available to the search object but is common.
231 lines
9.8 KiB
PHP
231 lines
9.8 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($sSQL),
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"Could not determine closest housenumber on an osm interpolation line."
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);
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}
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public function lookup($fLat, $fLon, $bDoInterpolation = true)
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{
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return $this->lookupPoint(
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'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)',
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$bDoInterpolation
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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 lookupPoint($sPointSQL, $bDoInterpolation = true)
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{
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$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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