mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-12-18 18:41:51 +03:00
368 lines
16 KiB
PHP
368 lines
16 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($sSQL),
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'Could not determine closest housenumber on an osm interpolation line.'
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);
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}
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protected function lookupLargeArea($sPointSQL, $iMaxRank)
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{
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$oResult = null;
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if ($iMaxRank > 4) {
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$aPlace = $this->lookupPolygon($sPointSQL, $iMaxRank);
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if ($aPlace) {
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return new Result($aPlace['place_id']);
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}
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}
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// If no polygon which contains the searchpoint is found,
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// searches in the country_osm_grid table for a polygon.
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return $this->lookupInCountry($sPointSQL, $iMaxRank);
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}
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protected function lookupInCountry($sPointSQL, $iMaxRank)
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{
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// searches for polygon in table country_osm_grid which contains the searchpoint
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// and searches for the nearest place node to the searchpoint in this polygon
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$sSQL = 'SELECT country_code FROM country_osm_grid';
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$sSQL .= ' WHERE ST_CONTAINS(geometry, '.$sPointSQL.') LIMIT 1';
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$sCountryCode = chksql(
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$this->oDB->getOne($sSQL),
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'Could not determine country polygon containing the point.'
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);
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if ($sCountryCode) {
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if ($iMaxRank > 4) {
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// look for place nodes with the given country code
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$sSQL = 'SELECT place_id FROM';
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$sSQL .= ' (SELECT place_id, rank_search,';
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$sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
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$sSQL .= ' FROM placex';
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$sSQL .= ' WHERE osm_type = \'N\'';
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$sSQL .= ' AND country_code = \''.$sCountryCode.'\'';
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$sSQL .= ' AND rank_search between 5 and ' .min(25, $iMaxRank);
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$sSQL .= ' AND class = \'place\' AND type != \'postcode\'';
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$sSQL .= ' AND name IS NOT NULL ';
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$sSQL .= ' and indexed_status = 0 and linked_place_id is null';
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$sSQL .= ' AND ST_DWithin('.$sPointSQL.', geometry, 1.8)) p ';
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$sSQL .= 'WHERE distance <= reverse_place_diameter(rank_search)';
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$sSQL .= ' ORDER BY rank_search DESC, distance ASC';
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$sSQL .= ' LIMIT 1';
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if (CONST_Debug) var_dump($sSQL);
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$aPlace = chksql(
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$this->oDB->getRow($sSQL),
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'Could not determine place node.'
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);
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if ($aPlace) {
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return new Result($aPlace['place_id']);
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}
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}
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// still nothing, then return the country object
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$sSQL = 'SELECT place_id, ST_distance('.$sPointSQL.', centroid) as distance';
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$sSQL .= ' FROM placex';
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$sSQL .= ' WHERE country_code = \''.$sCountryCode.'\'';
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$sSQL .= ' AND rank_search = 4 AND rank_address = 4';
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$sSQL .= ' AND class in (\'boundary\', \'place\')';
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$sSQL .= ' AND linked_place_id is null';
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$sSQL .= ' ORDER BY distance ASC';
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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 place node.'
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);
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if ($aPlace) {
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return new Result($aPlace['place_id']);
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}
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}
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return null;
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}
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/**
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* Search for areas or nodes for areas or nodes between state and suburb level.
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*
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* @param string $sPointSQL Search point as SQL string.
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* @param int $iMaxRank Maximum address rank of the feature.
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*
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* @return Record of the found feature or null.
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*
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* Searches first for polygon that contains the search point.
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* If such a polygon is found, place nodes with a higher rank are
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* searched inside the polygon.
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*/
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protected function lookupPolygon($sPointSQL, $iMaxRank)
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{
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// polygon search begins at suburb-level
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if ($iMaxRank > 25) $iMaxRank = 25;
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// no polygon search over country-level
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if ($iMaxRank < 5) $iMaxRank = 5;
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// search for polygon
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$sSQL = 'SELECT place_id, parent_place_id, rank_address, rank_search FROM';
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$sSQL .= '(select place_id, parent_place_id, rank_address, rank_search, country_code, geometry';
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$sSQL .= ' FROM placex';
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$sSQL .= ' WHERE ST_GeometryType(geometry) in (\'ST_Polygon\', \'ST_MultiPolygon\')';
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$sSQL .= ' AND rank_address Between 5 AND ' .$iMaxRank;
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$sSQL .= ' AND geometry && '.$sPointSQL;
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$sSQL .= ' AND type != \'postcode\' ';
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$sSQL .= ' AND name is not null';
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$sSQL .= ' AND indexed_status = 0 and linked_place_id is null';
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$sSQL .= ' ORDER BY rank_address DESC LIMIT 50 ) as a';
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$sSQL .= ' WHERE ST_CONTAINS(geometry, '.$sPointSQL.' )';
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$sSQL .= ' ORDER BY rank_address DESC LIMIT 1';
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$aPoly = chksql(
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$this->oDB->getRow($sSQL),
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'Could not determine polygon containing the point.'
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);
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if ($aPoly) {
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// if a polygon is found, search for placenodes begins ...
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$iParentPlaceID = $aPoly['parent_place_id'];
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$iRankAddress = $aPoly['rank_address'];
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$iRankSearch = $aPoly['rank_search'];
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$iPlaceID = $aPoly['place_id'];
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if ($iRankAddress != $iMaxRank) {
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$sSQL = 'SELECT place_id FROM ';
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$sSQL .= '(SELECT place_id, rank_search, country_code, geometry,';
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$sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
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$sSQL .= ' FROM placex';
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$sSQL .= ' WHERE osm_type = \'N\'';
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// using rank_search because of a better differentiation
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// for place nodes at rank_address 16
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$sSQL .= ' AND rank_search > '.$iRankSearch;
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$sSQL .= ' AND rank_search <= '.$iMaxRank;
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$sSQL .= ' AND class = \'place\'';
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$sSQL .= ' AND type != \'postcode\'';
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$sSQL .= ' AND name IS NOT NULL ';
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$sSQL .= ' AND indexed_status = 0 AND linked_place_id is null';
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$sSQL .= ' AND ST_DWithin('.$sPointSQL.', geometry, reverse_place_diameter('.$iRankSearch.'::smallint))';
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$sSQL .= ' ORDER BY distance ASC,';
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$sSQL .= ' rank_address DESC';
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$sSQL .= ' limit 500) as a';
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$sSQL .= ' WHERE ST_CONTAINS((SELECT geometry FROM placex WHERE place_id = '.$iPlaceID.'), geometry )';
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$sSQL .= ' AND distance <= reverse_place_diameter(rank_search)';
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$sSQL .= ' ORDER BY distance ASC, rank_search DESC';
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$sSQL .= ' LIMIT 1';
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if (CONST_Debug) var_dump($sSQL);
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$aPlacNode = chksql(
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$this->oDB->getRow($sSQL),
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'Could not determine place node.'
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);
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if ($aPlacNode) {
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return $aPlacNode;
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}
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}
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}
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return $aPoly;
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}
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public function lookup($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, $bDoInterpolation = true)
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{
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// starts if the search is on POI or street level,
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// searches for the nearest POI or street,
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// if a street is found and a POI is searched for,
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// the nearest POI which the found street is a parent of is choosen.
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$iMaxRank = $this->iMaxRank;
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// Find the nearest point
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$fSearchDiam = 0.006;
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$oResult = null;
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$aPlace = null;
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// for POI or street level
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if ($iMaxRank >= 26) {
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$sSQL = 'select place_id,parent_place_id,rank_address,country_code,';
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$sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
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$sSQL .= ' FROM ';
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$sSQL .= ' placex';
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
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$sSQL .= ' AND';
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// only streets
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if ($iMaxRank == 26) {
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$sSQL .= ' rank_address = 26';
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} else {
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$sSQL .= ' rank_address between 26 and '.$iMaxRank;
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}
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$sSQL .= ' and (name is not null or housenumber is not null';
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$sSQL .= ' or rank_address between 26 and 27)';
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$sSQL .= ' and class not in (\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
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$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($sSQL),
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'Could not determine closest place.'
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);
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if (CONST_Debug) var_dump($aPlace);
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if ($aPlace) {
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$iPlaceID = $aPlace['place_id'];
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$oResult = new Result($iPlaceID);
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$iRankAddress = $aPlace['rank_address'];
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$iParentPlaceID = $aPlace['parent_place_id'];
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}
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if ($bDoInterpolation && $iMaxRank >= 30) {
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$fDistance = $fSearchDiam;
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if ($aPlace) {
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// We can't reliably go from the closest street to an
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// interpolation line because the closest interpolation
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// may have a different street segments as a parent.
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// Therefore allow an interpolation line to take precendence
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// even when the street is closer.
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$fDistance = $iRankAddress < 28 ? 0.001 : $aPlace['distance'];
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}
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$aHouse = $this->lookupInterpolation($sPointSQL, $fDistance);
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if ($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 = $aHouse;
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$iRankAddress = 30;
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}
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}
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if ($aPlace) {
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// if street and maxrank > streetlevel
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if ($iRankAddress <= 27 && $iMaxRank > 27) {
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// find the closest object (up to a certain radius) of which the street is a parent of
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$sSQL = ' select place_id,';
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$sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
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$sSQL .= ' FROM ';
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$sSQL .= ' placex';
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// radius ?
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$sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, 0.001)';
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$sSQL .= ' AND parent_place_id = '.$iPlaceID;
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$sSQL .= ' and rank_address != 28';
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$sSQL .= ' and (name is not null or housenumber is not null)';
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$sSQL .= ' and class not in (\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
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$sSQL .= ' and indexed_status = 0 and linked_place_id is null';
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$sSQL .= ' ORDER BY distance ASC limit 1';
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if (CONST_Debug) var_dump($sSQL);
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$aStreet = chksql(
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$this->oDB->getRow($sSQL),
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'Could not determine closest place.'
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);
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if ($aStreet) {
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if (CONST_Debug) var_dump($aStreet);
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$oResult = new Result($aStreet['place_id']);
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}
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}
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// In the US we can check TIGER data for nearest housenumber
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if (CONST_Use_US_Tiger_Data
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&& $iRankAddress <= 27
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&& $aPlace['country_code'] == 'us'
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&& $this->iMaxRank >= 28
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) {
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$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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$sSQL .= 'ST_distance('.$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('.$sPointSQL.', linegeo, 0.001)';
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$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', $aPlaceTiger);
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$oResult = new Result($aPlaceTiger['place_id'], Result::TABLE_TIGER);
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$oResult->iHouseNumber = closestHouseNumber($aPlaceTiger);
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}
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}
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} else {
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// if no POI or street is found ...
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$oResult = $this->lookupLargeArea($sPointSQL, 25);
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}
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} else {
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// lower than street level ($iMaxRank < 26 )
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$oResult = $this->lookupLargeArea($sPointSQL, $iMaxRank);
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}
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return $oResult;
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}
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}
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