+ protected function polygonFunctions($sPointSQL, $iMaxRank)
+ {
+ // starts the nopolygonFound function if no polygon is found with the lookupPolygon function
+ $oResult = null;
+
+ $aPlace = $this->lookupPolygon($sPointSQL, $iMaxRank);
+ if ($aPlace) {
+ $oResult = new Result($aPlace['place_id']);
+ // if no polygon which contains the searchpoint is found,
+ // the noPolygonFound function searches in the country_osm_grid table for a polygon
+ } elseif (!$aPlace && $iMaxRank > 4) {
+ $aPlace = $this->noPolygonFound($sPointSQL, $iMaxRank);
+ if ($aPlace) {
+ $oResult = new Result($aPlace['place_id']);
+ }
+ }
+ return $oResult;
+ }
+
+ protected function noPolygonFound($sPointSQL, $iMaxRank)
+ {
+ // searches for polygon in table country_osm_grid which contains the searchpoint
+ // and searches for the nearest place node to the searchpoint in this polygon
+ $sSQL = 'SELECT country_code FROM country_osm_grid';
+ $sSQL .= ' WHERE ST_CONTAINS (geometry, '.$sPointSQL.') limit 1';
+
+ $aPoly = chksql(
+ $this->oDB->getRow($sSQL),
+ 'Could not determine polygon containing the point.'
+ );
+ if ($aPoly) {
+ $sCountryCode = $aPoly['country_code'];
+
+ $sSQL = 'SELECT place_id, ST_distance('.$sPointSQL.', geometry) as distance';
+ $sSQL .= ' FROM placex';
+ $sSQL .= ' WHERE osm_type = \'N\'';
+ $sSQL .= ' AND country_code = \''.$sCountryCode.'\'';
+ $sSQL .= ' AND rank_address > 0';
+ $sSQL .= ' AND rank_address <= ' .min(25, $iMaxRank);
+ $sSQL .= ' AND type != \'postcode\'';
+ $sSQL .= ' AND name IS NOT NULL ';
+ $sSQL .= ' and indexed_status = 0 and linked_place_id is null';
+ $sSQL .= ' AND ST_DWithin('.$sPointSQL.', geometry, 1.0)';
+ $sSQL .= ' ORDER BY distance ASC, rank_address DESC';
+ $sSQL .= ' LIMIT 1';
+
+ if (CONST_Debug) var_dump($sSQL);
+ $aPlacNode = chksql(
+ $this->oDB->getRow($sSQL),
+ 'Could not determine place node.'
+ );
+ if ($aPlacNode) {
+ return $aPlacNode;
+ }
+ }
+ }
+
+ protected function lookupPolygon($sPointSQL, $iMaxRank)
+ {
+ // searches for polygon where the searchpoint is within
+ // if a polygon is found, placenodes with a higher rank are searched inside the polygon
+
+ // polygon search begins at suburb-level
+ if ($iMaxRank > 25) $iMaxRank = 25;
+ // no polygon search over country-level
+ if ($iMaxRank < 4) $iMaxRank = 4;
+ // search for polygon
+ $sSQL = 'SELECT place_id, parent_place_id, rank_address, rank_search FROM';
+ $sSQL .= '(select place_id, parent_place_id, rank_address, rank_search, country_code, geometry';
+ $sSQL .= ' FROM placex';
+ $sSQL .= ' WHERE ST_GeometryType(geometry) in (\'ST_Polygon\', \'ST_MultiPolygon\')';
+ $sSQL .= ' AND rank_address Between 4 AND ' .$iMaxRank;
+ $sSQL .= ' AND geometry && '.$sPointSQL;
+ $sSQL .= ' AND type != \'postcode\' ';
+ $sSQL .= ' AND name is not null';
+ $sSQL .= ' AND indexed_status = 0 and linked_place_id is null';
+ $sSQL .= ' ORDER BY rank_address DESC LIMIT 50 ) as a';
+ $sSQL .= ' WHERE ST_CONTAINS(geometry, '.$sPointSQL.' )';
+ $sSQL .= ' ORDER BY rank_address DESC LIMIT 1';
+
+ $aPoly = chksql(
+ $this->oDB->getRow($sSQL),
+ 'Could not determine polygon containing the point.'
+ );
+ if ($aPoly) {
+ // if a polygon is found, search for placenodes begins ...
+ $iParentPlaceID = $aPoly['parent_place_id'];
+ $iRankAddress = $aPoly['rank_address'];
+ $iRankSearch = $aPoly['rank_search'];
+ $iPlaceID = $aPoly['place_id'];
+
+ if ($iRankAddress != $iMaxRank) {
+ //search diameter for the place node search
+ if ($iMaxRank <= 4) {
+ $fSearchDiam = 4;
+ } elseif ($iMaxRank <= 8) {
+ $fSearchDiam = 2;
+ } elseif ($iMaxRank <= 10) {
+ $fSearchDiam = 1;
+ } elseif ($iMaxRank <= 12) {
+ $fSearchDiam = 0.8;
+ } elseif ($iMaxRank <= 17) {
+ $fSearchDiam = 0.6;
+ } elseif ($iMaxRank <= 18) {
+ $fSearchDiam = 0.2;
+ } elseif ($iMaxRank <= 25) {
+ $fSearchDiam = 0.1;
+ }
+
+ $sSQL = 'SELECT place_id';
+ $sSQL .= ' FROM (';
+ $sSQL .= ' SELECT place_id, rank_address,country_code, geometry,';
+ $sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
+ $sSQL .= ' FROM placex';
+ $sSQL .= ' WHERE osm_type = \'N\'';
+ if ($iRankAddress = 16) {
+ // using rank_search because of a better differentiation for place nodes at rank_address 16
+ $sSQL .= ' AND rank_search > '.$iRankSearch;
+ $sSQL .= ' AND rank_search <= ' .$iMaxRank;
+ $sSQL .= ' AND class = \'place\'';
+ } else {
+ $sSQL .= ' AND rank_address > '.$iRankAddress;
+ $sSQL .= ' AND rank_address <= ' .$iMaxRank;
+ }
+ $sSQL .= ' AND ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
+ $sSQL .= ' AND type != \'postcode\'';
+ $sSQL .= ' AND name IS NOT NULL ';
+ $sSQL .= ' and indexed_status = 0 and linked_place_id is null';
+ // preselection through bbox
+ $sSQL .= ' AND (SELECT geometry FROM placex WHERE place_id = '.$iPlaceID.') && geometry';
+ $sSQL .= ' ORDER BY distance ASC,';
+ $sSQL .= ' rank_address DESC';
+ $sSQL .= ' limit 500) as a';
+ $sSQL .= ' WHERE ST_CONTAINS((SELECT geometry FROM placex WHERE place_id = '.$iPlaceID.'), geometry )';
+ $sSQL .= ' ORDER BY distance ASC, rank_address DESC';
+ $sSQL .= ' LIMIT 1';
+
+ if (CONST_Debug) var_dump($sSQL);
+ $aPlacNode = chksql(
+ $this->oDB->getRow($sSQL),
+ 'Could not determine place node.'
+ );
+ if ($aPlacNode) {
+ return $aPlacNode;
+ }
+ }
+ }
+ return $aPoly;
+ }
+
+
projects / nominatim.git / blobdiff