]> git.openstreetmap.org Git - nominatim.git/blobdiff - lib/ReverseGeocode.php
README: tiny markdown syntax error
[nominatim.git] / lib / ReverseGeocode.php
index b523d0aaa9b54a726389691596d28eea5c2a9d31..820ca3855b178ef4365201ce5db9481f159d223b 100644 (file)
 <?php
-       class ReverseGeocode
-       {
-               protected $oDB;
-               protected $iMaxRank = 28;
-
-               function ReverseGeocode(&$oDB)
-               {
-                       $this->oDB =& $oDB;
-               }
-
-               function setZoom($iZoom)
-               {
-                       // Zoom to rank, this could probably be calculated but a lookup gives fine control
-                       $aZoomRank = array(
-                               0 => 2, // Continent / Sea
-                               1 => 2,
-                               2 => 2,
-                               3 => 4, // Country
-                               4 => 4,
-                               5 => 8, // State
-                               6 => 10, // Region
-                               7 => 10,
-                               8 => 12, // County
-                               9 => 12,
-                               10 => 17, // City
-                               11 => 17,
-                               12 => 18, // Town / Village
-                               13 => 18,
-                               14 => 22, // Suburb
-                               15 => 22,
-                               16 => 26, // Street, TODO: major street?
-                               17 => 26,
-                               18 => 30, // or >, Building
-                               19 => 30, // or >, Building
-                               );
-                       $this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28;
-               }
-
-               // returns { place_id =>, type => '(osm|tiger)' }
-               // fails if no place was found
-               function lookup($fLat, $fLon, $bDoInterpolation = true)
-               {
-                       $sPointSQL = 'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)';
-                       $iMaxRank = $this->iMaxRank;
-
-                       // Find the nearest point
-                       $fSearchDiam = 0.0004;
-                       $iPlaceID = null;
-                       $aArea = false;
-                       $fMaxAreaDistance = 1;
-                       $bIsInUnitedStates = false;
-                       $bPlaceIsTiger = false;
-                       $bPlaceIsLine = false;
-                       while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance)
-                       {
-                               $fSearchDiam = $fSearchDiam * 2;
-
-                               // If we have to expand the search area by a large amount then we need a larger feature
-                               // then there is a limit to how small the feature should be
-                               if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
-                               if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
-                               if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
-                               if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
-                               if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
-                               if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
-                               if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22;
-                               if ($fSearchDiam > 0.001 && $iMaxRank > 26) $iMaxRank = 26;
-
-                               $sSQL = 'select place_id,parent_place_id,rank_search,calculated_country_code';
-                               $sSQL .= ' FROM placex';
-                               $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
-                               $sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank;
-                               $sSQL .= ' and (name is not null or housenumber is not null)';
-                               $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
-                               $sSQL .= ' and indexed_status = 0 ';
-                               $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
-                               $sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))';
-                               $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
-                               if (CONST_Debug) var_dump($sSQL);
-                               $aPlace = chksql($this->oDB->getRow($sSQL),
-                                                "Could not determine closest place.");
-                               $iPlaceID = $aPlace['place_id'];
-                               $iParentPlaceID = $aPlace['parent_place_id'];
-                               $bIsInUnitedStates = ($aPlace['calculated_country_code'] == 'us');
-                       }
-                       // if a street or house was found, look in interpolation lines table
-                       if ($bDoInterpolation && $this->iMaxRank >= 28 && $aPlace && $aPlace['rank_search'] >= 26)
-                       {
-                               // if a house was found, search the interpolation line that is at least as close as the house
-                               $sSQL = 'SELECT place_id, parent_place_id, 30 as rank_search, ST_line_locate_point(linegeo,'.$sPointSQL.') as fraction';
-                               $sSQL .= ' FROM location_property_osmline';
-                               $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')';
-                               $sSQL .= ' and indexed_status = 0 ';
-                               $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1';
-                               
-                               if (CONST_Debug)
-                               {
-                                       $sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL);
-                                       var_dump($sSQL);
-
-                                       $aAllHouses = chksql($this->oDB->getAll($sSQL));
-                                       foreach($aAllHouses as $i)
-                                       {
-                                               echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
-                                       }
-                               }
-                               $aPlaceLine = chksql($this->oDB->getRow($sSQL),
-                                                    "Could not determine closest housenumber on an osm interpolation line.");
-                               if ($aPlaceLine)
-                               {
-                                       if (CONST_Debug) var_dump('found housenumber in interpolation lines table', $aPlaceLine);
-                                       if ($aPlace['rank_search'] == 30)
-                                       {
-                                               // if a house was already found in placex, we have to find out, 
-                                               // if the placex house or the interpolated house are closer to the searched point
-                                               // distance between point and placex house
-                                               $sSQL = 'SELECT ST_distance('.$sPointSQL.', house.geometry) as distance FROM placex as house WHERE house.place_id='.$iPlaceID;
-                                               $aDistancePlacex = chksql($this->oDB->getRow($sSQL),
-                                                                         "Could not determine distance between searched point and placex house.");
-                                               $fDistancePlacex = $aDistancePlacex['distance'];
-                                               // distance between point and interpolated house (fraction on interpolation line)
-                                               $sSQL = 'SELECT ST_distance('.$sPointSQL.', ST_LineInterpolatePoint(linegeo, '.$aPlaceLine['fraction'].')) as distance';
-                                               $sSQL .= ' FROM location_property_osmline WHERE place_id = '.$aPlaceLine['place_id'];
-                                               $aDistanceInterpolation = chksql($this->oDB->getRow($sSQL),
-                                                                                "Could not determine distance between searched point and interpolated house.");
-                                               $fDistanceInterpolation = $aDistanceInterpolation['distance'];
-                                               if ($fDistanceInterpolation < $fDistancePlacex)
-                                               {
-                                                       // interpolation is closer to point than placex house
-                                                       $bPlaceIsLine = true;
-                                                       $aPlace = $aPlaceLine;
-                                                       $iPlaceID = $aPlaceLine['place_id'];
-                                                       $iParentPlaceID = $aPlaceLine['parent_place_id']; // the street
-                                                       $fFraction = $aPlaceLine['fraction'];
-                                                       $iMaxRank = 30;
-                                               }
-                                               // else: nothing to do, take placex house from above
-                                       }
-                                       else
-                                       {
-                                               $bPlaceIsLine = true;
-                                               $aPlace = $aPlaceLine;
-                                               $iPlaceID = $aPlaceLine['place_id'];
-                                               $iParentPlaceID = $aPlaceLine['parent_place_id']; // the street
-                                               $fFraction = $aPlaceLine['fraction'];
-                                               $iMaxRank = 30;
-                                       }
-                               }
-                       }
-                       
-                       // Only street found? If it's in the US we can check TIGER data for nearest housenumber
-                       if (CONST_Use_US_Tiger_Data && $bDoInterpolation && $bIsInUnitedStates && $this->iMaxRank >= 28 && $iPlaceID && ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27 ))
-                       {
-                               $fSearchDiam = 0.001;
-                               $sSQL = 'SELECT place_id,parent_place_id,30 as rank_search, ST_line_locate_point(linegeo,'.$sPointSQL.') as fraction';
-                               //if (CONST_Debug) { $sSQL .= ', housenumber, ST_distance('.$sPointSQL.', centroid) as distance, st_y(centroid) as lat, st_x(centroid) as lon'; }
-                               $sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$iPlaceID;
-                               $sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')';  //no centroid anymore in Tiger data, now we have lines
-                               $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1';
-
-                               if (CONST_Debug)
-                               {
-                                       $sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL);
-                                       var_dump($sSQL);
-
-                                       $aAllHouses = chksql($this->oDB->getAll($sSQL));
-                                       foreach($aAllHouses as $i)
-                                       {
-                                               echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
-                                       }
-                               }
-
-                               $aPlaceTiger = chksql($this->oDB->getRow($sSQL),
-                                                     "Could not determine closest Tiger place.");
-                               if ($aPlaceTiger)
-                               {
-                                       if (CONST_Debug) var_dump('found Tiger housenumber', $aPlaceTiger);
-                                       $bPlaceIsTiger = true;
-                                       $aPlace = $aPlaceTiger;
-                                       $iPlaceID = $aPlaceTiger['place_id'];
-                                       $iParentPlaceID = $aPlaceTiger['parent_place_id']; // the street
-                                       $fFraction = $aPlaceTiger['fraction'];
-                                       $iMaxRank = 30;
-                               }
-                       }
-
-                       // The point we found might be too small - use the address to find what it is a child of
-                       if ($iPlaceID && $iMaxRank < 28)
-                       {
-                               if (($aPlace['rank_search'] > 28 || $bPlaceIsTiger || $bPlaceIsLine) && $iParentPlaceID)
-                               {
-                                       $iPlaceID = $iParentPlaceID;
-                               }
-                               $sSQL  = 'select address_place_id';
-                               $sSQL .= ' FROM place_addressline';
-                               $sSQL .= " WHERE place_id = $iPlaceID";
-                               $sSQL .= " ORDER BY abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc";
-                               $sSQL .= ' LIMIT 1';
-                               $iPlaceID = chksql($this->oDB->getOne($sSQL),
-                                                  "Could not get parent for place.");
-                               if (!$iPlaceID)
-                               {
-                                       $iPlaceID = $aPlace['place_id'];
-                               }
-                       }
-                       return array('place_id' => $iPlaceID,
-                                               'type' => $bPlaceIsTiger ? 'tiger' : ($bPlaceIsLine ? 'interpolation' : 'osm'),
-                                               'fraction' => ($bPlaceIsTiger || $bPlaceIsLine) ? $fFraction : -1);
-               }
-               
-       }
-?>
+
+namespace Nominatim;
+
+require_once(CONST_BasePath.'/lib/Result.php');
+
+class ReverseGeocode
+{
+    protected $oDB;
+    protected $iMaxRank = 28;
+
+
+    public function __construct(&$oDB)
+    {
+        $this->oDB =& $oDB;
+    }
+
+
+    public function setZoom($iZoom)
+    {
+        // Zoom to rank, this could probably be calculated but a lookup gives fine control
+        $aZoomRank = array(
+                      0 => 2, // Continent / Sea
+                      1 => 2,
+                      2 => 2,
+                      3 => 4, // Country
+                      4 => 4,
+                      5 => 8, // State
+                      6 => 10, // Region
+                      7 => 10,
+                      8 => 12, // County
+                      9 => 12,
+                      10 => 17, // City
+                      11 => 17,
+                      12 => 18, // Town / Village
+                      13 => 18,
+                      14 => 22, // Suburb
+                      15 => 22,
+                      16 => 26, // Street, TODO: major street?
+                      17 => 26,
+                      18 => 30, // or >, Building
+                      19 => 30, // or >, Building
+                     );
+        $this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28;
+    }
+
+    /**
+     * Find the closest interpolation with the given search diameter.
+     *
+     * @param string $sPointSQL   Reverse geocoding point as SQL
+     * @param float  $fSearchDiam Search diameter
+     *
+     * @return Record of the interpolation or null.
+     */
+    protected function lookupInterpolation($sPointSQL, $fSearchDiam)
+    {
+        $sSQL = 'SELECT place_id, parent_place_id, 30 as rank_search,';
+        $sSQL .= '  ST_LineLocatePoint(linegeo,'.$sPointSQL.') as fraction,';
+        $sSQL .= '  startnumber, endnumber, interpolationtype,';
+        $sSQL .= '  ST_Distance(linegeo,'.$sPointSQL.') as distance';
+        $sSQL .= ' FROM location_property_osmline';
+        $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')';
+        $sSQL .= ' and indexed_status = 0 and startnumber is not NULL ';
+        $sSQL .= ' ORDER BY distance ASC limit 1';
+
+        return chksql(
+            $this->oDB->getRow($sSQL),
+            'Could not determine closest housenumber on an osm interpolation line.'
+        );
+    }
+
+    protected function lookupLargeArea($sPointSQL, $iMaxRank)
+    {
+        $oResult = null;
+
+        if ($iMaxRank > 4) {
+            $aPlace = $this->lookupPolygon($sPointSQL, $iMaxRank);
+            if ($aPlace) {
+                return new Result($aPlace['place_id']);
+            }
+        }
+
+        // If no polygon which contains the searchpoint is found,
+        // searches in the country_osm_grid table for a polygon.
+        return  $this->lookupInCountry($sPointSQL, $iMaxRank);
+    }
+
+    protected function lookupInCountry($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';
+
+        $sCountryCode = chksql(
+            $this->oDB->getOne($sSQL),
+            'Could not determine country polygon containing the point.'
+        );
+        if ($sCountryCode) {
+            if ($iMaxRank > 4) {
+                // look for place nodes with the given country code
+                $sSQL = 'SELECT place_id FROM';
+                $sSQL .= ' (SELECT place_id, rank_search,';
+                $sSQL .= '         ST_distance('.$sPointSQL.', geometry) as distance';
+                $sSQL .= ' FROM placex';
+                $sSQL .= ' WHERE osm_type = \'N\'';
+                $sSQL .= ' AND country_code = \''.$sCountryCode.'\'';
+                $sSQL .= ' AND rank_search between 5 and ' .min(25, $iMaxRank);
+                $sSQL .= ' AND class = \'place\' 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, 1.8)) p ';
+                $sSQL .= 'WHERE distance <= reverse_place_diameter(rank_search)';
+                $sSQL .= ' ORDER BY rank_search DESC, distance ASC';
+                $sSQL .= ' LIMIT 1';
+
+                if (CONST_Debug) var_dump($sSQL);
+                $aPlace = chksql(
+                    $this->oDB->getRow($sSQL),
+                    'Could not determine place node.'
+                );
+                if ($aPlace) {
+                    return new Result($aPlace['place_id']);
+                }
+            }
+
+            // still nothing, then return the country object
+            $sSQL = 'SELECT place_id, ST_distance('.$sPointSQL.', centroid) as distance';
+            $sSQL .= ' FROM placex';
+            $sSQL .= ' WHERE country_code = \''.$sCountryCode.'\'';
+            $sSQL .= ' AND rank_search = 4 AND rank_address = 4';
+            $sSQL .= ' AND class in (\'boundary\',  \'place\')';
+            $sSQL .= ' AND linked_place_id is null';
+            $sSQL .= ' ORDER BY distance ASC';
+
+            if (CONST_Debug) var_dump($sSQL);
+            $aPlace = chksql(
+                $this->oDB->getRow($sSQL),
+                'Could not determine place node.'
+            );
+            if ($aPlace) {
+                return new Result($aPlace['place_id']);
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Search for areas or nodes for areas or nodes between state and suburb level.
+     *
+     * @param string $sPointSQL Search point as SQL string.
+     * @param int    $iMaxRank  Maximum address rank of the feature.
+     *
+     * @return Record of the found feature or null.
+     *
+     * Searches first for polygon that contains the search point.
+     * If such a polygon is found, place nodes with a higher rank are
+     * searched inside the polygon.
+     */
+    protected function lookupPolygon($sPointSQL, $iMaxRank)
+    {
+        // polygon search begins at suburb-level
+        if ($iMaxRank > 25) $iMaxRank = 25;
+        // no polygon search over country-level
+        if ($iMaxRank < 5) $iMaxRank = 5;
+        // 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\')';
+        $sSQL .= ' AND rank_address Between 5 AND ' .$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) {
+                $sSQL = 'SELECT place_id FROM ';
+                $sSQL .= '(SELECT place_id, rank_search, country_code, geometry,';
+                $sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
+                $sSQL .= ' FROM placex';
+                $sSQL .= ' WHERE osm_type = \'N\'';
+                // 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\'';
+                $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, reverse_place_diameter('.$iRankSearch.'::smallint))';
+                $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 .= ' AND distance <= reverse_place_diameter(rank_search)';
+                $sSQL .= ' ORDER BY distance ASC, rank_search 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 $aPoly;
+    }
+
+
+    public function lookup($fLat, $fLon, $bDoInterpolation = true)
+    {
+        return $this->lookupPoint(
+            'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)',
+            $bDoInterpolation
+        );
+    }
+
+    public function lookupPoint($sPointSQL, $bDoInterpolation = true)
+    {
+        // starts if the search is on POI or street level,
+        // searches for the nearest POI or street,
+        // if a street is found and a POI is searched for,
+        // the nearest POI which the found street is a parent of is choosen.
+        $iMaxRank = $this->iMaxRank;
+
+        // Find the nearest point
+        $fSearchDiam = 0.006;
+        $oResult = null;
+        $aPlace = null;
+
+        // for POI or street level
+        if ($iMaxRank >= 26) {
+            $sSQL = 'select place_id,parent_place_id,rank_address,country_code,';
+            $sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
+            $sSQL .= ' FROM ';
+            $sSQL .= ' placex';
+            $sSQL .= '   WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
+            $sSQL .= '   AND';
+            // only streets
+            if ($iMaxRank == 26) {
+                $sSQL .= ' rank_address = 26';
+            } else {
+                $sSQL .= ' rank_address between 26 and '.$iMaxRank;
+            }
+            $sSQL .= ' and (name is not null or housenumber is not null';
+            $sSQL .= ' or rank_address between 26 and 27)';
+            $sSQL .= ' and class not in (\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
+            $sSQL .= ' and indexed_status = 0 and linked_place_id is null';
+            $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
+            $sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))';
+            $sSQL .= ' ORDER BY distance ASC limit 1';
+            if (CONST_Debug) var_dump($sSQL);
+            $aPlace = chksql(
+                $this->oDB->getRow($sSQL),
+                'Could not determine closest place.'
+            );
+
+            if (CONST_Debug) var_dump($aPlace);
+            if ($aPlace) {
+                $iPlaceID = $aPlace['place_id'];
+                $oResult = new Result($iPlaceID);
+                $iRankAddress = $aPlace['rank_address'];
+                $iParentPlaceID = $aPlace['parent_place_id'];
+            }
+
+            if ($bDoInterpolation && $iMaxRank >= 30) {
+                $fDistance = $fSearchDiam;
+                if ($aPlace) {
+                    // We can't reliably go from the closest street to an
+                    // interpolation line because the closest interpolation
+                    // may have a different street segments as a parent.
+                    // Therefore allow an interpolation line to take precendence
+                    // even when the street is closer.
+                    $fDistance = $iRankAddress < 28 ? 0.001 : $aPlace['distance'];
+                }
+
+                $aHouse = $this->lookupInterpolation($sPointSQL, $fDistance);
+
+                if ($aHouse) {
+                    $oResult = new Result($aHouse['place_id'], Result::TABLE_OSMLINE);
+                    $oResult->iHouseNumber = closestHouseNumber($aHouse);
+                    $aPlace = $aHouse;
+                    $iRankAddress = 30;
+                }
+            }
+
+            if ($aPlace) {
+                // if street and maxrank > streetlevel
+                if ($iRankAddress <= 27 && $iMaxRank > 27) {
+                    // find the closest object (up to a certain radius) of which the street is a parent of
+                    $sSQL = ' select place_id,';
+                    $sSQL .= ' ST_distance('.$sPointSQL.', geometry) as distance';
+                    $sSQL .= ' FROM ';
+                    $sSQL .= ' placex';
+                    // radius ?
+                    $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, 0.001)';
+                    $sSQL .= ' AND parent_place_id = '.$iPlaceID;
+                    $sSQL .= ' and rank_address != 28';
+                    $sSQL .= ' and (name is not null or housenumber is not null)';
+                    $sSQL .= ' and class not in (\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
+                    $sSQL .= ' and indexed_status = 0 and linked_place_id is null';
+                    $sSQL .= ' ORDER BY distance ASC limit 1';
+                    if (CONST_Debug) var_dump($sSQL);
+                    $aStreet = chksql(
+                        $this->oDB->getRow($sSQL),
+                        'Could not determine closest place.'
+                    );
+                    if ($aStreet) {
+                        if (CONST_Debug) var_dump($aStreet);
+                        $oResult = new Result($aStreet['place_id']);
+                    }
+                }
+
+                  // In the US we can check TIGER data for nearest housenumber
+                if (CONST_Use_US_Tiger_Data
+                    && $iRankAddress <= 27
+                    && $aPlace['country_code'] == 'us'
+                    && $this->iMaxRank >= 28
+                ) {
+                    $sSQL = 'SELECT place_id,parent_place_id,30 as rank_search,';
+                    $sSQL .= 'ST_LineLocatePoint(linegeo,'.$sPointSQL.') as fraction,';
+                    $sSQL .= 'ST_distance('.$sPointSQL.', linegeo) as distance,';
+                    $sSQL .= 'startnumber,endnumber,interpolationtype';
+                    $sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$oResult->iId;
+                    $sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, 0.001)';
+                    $sSQL .= ' ORDER BY distance ASC limit 1';
+                    if (CONST_Debug) var_dump($sSQL);
+                    $aPlaceTiger = chksql(
+                        $this->oDB->getRow($sSQL),
+                        'Could not determine closest Tiger place.'
+                    );
+                    if ($aPlaceTiger) {
+                        if (CONST_Debug) var_dump('found Tiger housenumber', $aPlaceTiger);
+                        $oResult = new Result($aPlaceTiger['place_id'], Result::TABLE_TIGER);
+                        $oResult->iHouseNumber = closestHouseNumber($aPlaceTiger);
+                    }
+                }
+            } else {
+                // if no POI or street is found ...
+                $oResult = $this->lookupLargeArea($sPointSQL, 25);
+            }
+        } else {
+            // lower than street level ($iMaxRank < 26 )
+            $oResult = $this->lookupLargeArea($sPointSQL, $iMaxRank);
+        }
+        return $oResult;
+    }
+}