mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-12-28 07:24:09 +03:00
223 lines
9.3 KiB
PHP
223 lines
9.3 KiB
PHP
<?php
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namespace Nominatim;
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require_once(CONST_BasePath.'/lib/Result.php');
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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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$sSQL .= ' startnumber, endnumber, interpolationtype,';
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$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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$sSQL .= ' ORDER BY distance ASC limit 1';
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return chksql(
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$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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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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$oResult = null;
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$aPlace = null;
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$fMaxAreaDistance = 1;
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$bIsTigerStreet = false;
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while ($oResult === null && $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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$aHouse = $this->lookupInterpolation($sPointSQL, $fSearchDiam/2);
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if ($aHouse) {
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$oResult = new Result($aHouse['place_id'], Result::TABLE_OSMLINE);
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$oResult->iHouseNumber = closestHouseNumber($aHouse);
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$aPlace = $aHouse;
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$iParentPlaceID = $aHouse['parent_place_id']; // the street
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$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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$sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
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$sSQL .= ' FROM ';
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if ($fSearchDiam < 0.01) {
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$sSQL .= ' placex';
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
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$sSQL .= ' AND';
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} else {
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$sSQL .= ' (SELECT * FROM placex ';
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
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$sSQL .= ' LIMIT 1000) as p WHERE';
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}
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$sSQL .= ' rank_search != 28 and rank_search >= '.$iMaxRank;
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$sSQL .= ' and (name is not null or housenumber is not null';
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$sSQL .= ' or rank_search between 26 and 27)';
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$sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
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$sSQL .= ' and indexed_status = 0 and linked_place_id is null';
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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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$sSQL .= ' ORDER BY distance ASC limit 1';
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if (CONST_Debug) var_dump($sSQL);
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$aPlace = chksql(
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$this->oDB->getRow($sSQL),
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'Could not determine closest place.'
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);
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if ($aPlace) {
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$oResult = new Result($aPlace['place_id']);
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$iParentPlaceID = $aPlace['parent_place_id'];
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if ($bDoInterpolation) {
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if ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27) {
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$bIsTigerStreet = ($aPlace['country_code'] == 'us');
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} elseif ($aPlace['rank_search'] == 30) {
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// If a house was found, make sure there isn't an
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// interpolation line that is closer.
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$aHouse = $this->lookupInterpolation(
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$sPointSQL,
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$aPlace['distance']
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);
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if ($aHouse && $aPlace['distance'] < $aHouse['distance']) {
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$oResult = new Result(
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$aHouse['place_id'],
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Result::TABLE_OSMLINE
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);
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$oResult->iHouseNumber = closestHouseNumber($aHouse);
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$aPlace = $aHouse;
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$iParentPlaceID = $aHouse['parent_place_id'];
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}
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}
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}
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}
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}
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// Only street found? In the US we can check TIGER data for nearest housenumber
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if (CONST_Use_US_Tiger_Data && $bIsTigerStreet && $this->iMaxRank >= 28) {
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$fSearchDiam = $aPlace['rank_search'] > 28 ? $aPlace['distance'] : 0.001;
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$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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$sSQL .= 'ST_distance('.$sPointSQL.', linegeo) as distance,';
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$sSQL .= 'startnumber,endnumber,interpolationtype';
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$sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$oResult->iId;
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$sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')';
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$sSQL .= ' ORDER BY distance ASC limit 1';
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if (CONST_Debug) var_dump($sSQL);
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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', $aPlaceTiger);
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$aPlace = $aPlaceTiger;
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$oResult = new Result($aPlace['place_id'], Result::TABLE_TIGER);
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$oResult->iHouseNumber = closestHouseNumber($aPlaceTiger);
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$iParentPlaceID = $aPlace['parent_place_id'];
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$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 ($oResult !== null && $iMaxRank < 28) {
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if ($aPlace['rank_search'] > 28 && $iParentPlaceID) {
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$iPlaceID = $iParentPlaceID;
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} else {
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$iPlaceID = $oResult->iId;
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}
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$sSQL = 'select coalesce(p.linked_place_id, a.address_place_id)';
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$sSQL .= ' FROM place_addressline a, placex p';
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$sSQL .= " WHERE a.place_id = $iPlaceID and a.place_id = p.place_id";
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$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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$oResult = new Result($iPlaceID);
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}
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}
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return $oResult;
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}
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}
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