added comments and improved geOutline function

[nominatim.git] / lib / ReverseGeocode.php

diff --git a/lib/ReverseGeocode.php b/lib/ReverseGeocode.php
index 5713143402675e43130edb236ba94b0b77ffc519..41da26676f771cbd1750b66a3a790400be469e0d 100644 (file)
--- a/lib/ReverseGeocode.php
+++ b/lib/ReverseGeocode.php
@@ -1,327 +1,366 @@
 <?php
 <?php

-       class ReverseGeocode
-       {
-               protected $oDB;

 
 

-               protected $fLat;
-               protected $fLon;
-               protected $iMaxRank = 28;
+namespace Nominatim;

 
 

-               protected $aLangPrefOrder = array();
+require_once(CONST_BasePath.'/lib/Result.php');

 
 

-               protected $bIncludePolygonAsPoints = false;
-               protected $bIncludePolygonAsText = false;
-               protected $bIncludePolygonAsGeoJSON = false;
-               protected $bIncludePolygonAsKML = false;
-               protected $bIncludePolygonAsSVG = false;
-               protected $fPolygonSimplificationThreshold = 0.0;
+class ReverseGeocode
+{
+    protected $oDB;
+    protected $iMaxRank = 28;

 
 
 
 

-               function ReverseGeocode(&$oDB)
-               {
-                       $this->oDB =& $oDB;
-               }
+    public function __construct(&$oDB)
+    {
+        $this->oDB =& $oDB;
+    }

 
 

-               function setLanguagePreference($aLangPref)
-               {
-                       $this->aLangPrefOrder = $aLangPref;
-               }

 
 

-               function setLatLon($fLat, $fLon)
-               {
-                       $this->fLat = (float)$fLat;
-                       $this->fLon = (float)$fLon;
-               }
+    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;
+    }

 
 

-               function setRank($iRank)
-               {
-                       $this->iMaxRank = $iRank;
-               }
+    /**
+     * Find the closest interpolation with the given search diameter.
+     *
+     * @param string  $sPointSQL      Reverse geocoding point as SQL
+     * @param float   $fSearchDiam    Search diameter
+     * @param integer $iParentPlaceID Id of parent object
+     *
+     * @return Record of the interpolation or null.
+     */
+    protected function lookupInterpolation($sPointSQL, $fSearchDiam, $iParentPlaceID = null)
+    {
+        $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.')';
+        $sSQL .= ' and indexed_status = 0 and startnumber is not NULL ';
+        if (isset($iParentPlaceID)) {
+            $sSQL .= ' and parent_place_id = '.$iParentPlaceID;
+        }
+        $sSQL .= ' ORDER BY distance ASC limit 1';

 
 

-               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;
-               }
+        return chksql(
+            $this->oDB->getRow($sSQL),
+            'Could not determine closest housenumber on an osm interpolation line.'
+        );
+    }
+    
+    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 * FROM country_osm_grid';
+        $sSQL .= ' WHERE ST_CONTAINS (geometry, '.$sPointSQL.' )';
+        
+        $aPoly = chksql(
+            $this->oDB->getRow($sSQL),
+            'Could not determine polygon containing the point.'
+        );
+        if ($aPoly) {
+            $sCountryCode = $aPoly['country_code'];
+            
+            $sSQL = 'SELECT *, ST_distance('.$sPointSQL.', geometry) as distance';
+            $sSQL .= ' FROM placex';
+            $sSQL .= ' WHERE osm_type = \'N\'';
+            $sSQL .= ' AND country_code = \''.$sCountryCode.'\'';
+            $sSQL .= ' AND rank_address > 0';
+            $sSQL .= ' AND rank_address <= ' .$iMaxRank;
+            $sSQL .= ' AND type != \'postcode\'';
+            $sSQL .= ' AND name IS NOT NULL ';
+            $sSQL .= ' and indexed_status = 0 and linked_place_id is null';
+            $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 * 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';

 
 

-                               function setIncludePolygonAsPoints($b = true)
-               {
-                       $this->bIncludePolygonAsPoints = $b;
-               }
+        $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 *';
+                $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;
+    }
+    

 
 

-               function getIncludePolygonAsPoints()
-               {
-                       return $this->bIncludePolygonAsPoints;
-               }
+    public function lookup($fLat, $fLon, $bDoInterpolation = true)
+    {
+        return $this->lookupPoint(
+            'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)',
+            $bDoInterpolation
+        );
+    }

 
 

-               function setIncludePolygonAsText($b = true)
-               {
-                       $this->bIncludePolygonAsText = $b;
-               }
+    public function lookupPoint($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;

 
 

-               function getIncludePolygonAsText()
-               {
-                       return $this->bIncludePolygonAsText;
-               }
+        // Find the nearest point
+        $fSearchDiam = 0.006;
+        $oResult = null;
+        $aPlace = null;
+        $fMaxAreaDistance = 1;
+        $bIsTigerStreet = false;
+       
+        // for POI or street level
+        if ($iMaxRank >= 26) {
+            $sSQL = 'select place_id,parent_place_id,rank_address,country_code,';
+            $sSQL .= 'CASE WHEN ST_GeometryType(geometry) in (\'ST_Polygon\',\'ST_MultiPolygon\') THEN ST_distance('.$sPointSQL.', centroid)';
+            $sSQL .= ' ELSE ST_distance('.$sPointSQL.', geometry) ';
+            $sSQL .= ' END 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 ($aPlace) {
+                    
+                $iDistance = $aPlace['distance'];
+                $iPlaceID = $aPlace['place_id'];
+                $oResult = new Result($iPlaceID);
+                $iParentPlaceID = $aPlace['parent_place_id'];
+                
+                if ($bDoInterpolation && $iMaxRank >= 30) {
+                    if ($aPlace['rank_address'] <=27) {
+                        $iDistance = 0.001;
+                    }
+                    $aHouse = $this->lookupInterpolation($sPointSQL, $iDistance);

 
 

-               function setIncludePolygonAsGeoJSON($b = true)
-               {
-                       $this->bIncludePolygonAsGeoJSON = $b;
-               }
+                    if ($aHouse) {
+                        $oResult = new Result($aHouse['place_id'], Result::TABLE_OSMLINE);
+                        $oResult->iHouseNumber = closestHouseNumber($aHouse);
+                    }
+                }
+                
+                // if street and maxrank > streetlevel
+                if (($aPlace['rank_address'] <=27)&& $iMaxRank > 27) {
+                    // find the closest object (up to a certain radius) of which the street is a parent of
+                    $sSQL = ' select place_id,parent_place_id,rank_address,country_code,';
+                    $sSQL .= ' ST_distance('.$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) {
+                        $iDistance = $aStreet['distance'];
+                        $iPlaceID = $aStreet['place_id'];
+                        $oResult = new Result($iPlaceID);
+                        $iParentPlaceID = $aStreet['parent_place_id'];
+                            
+                        if ($bDoInterpolation && $iMaxRank >= 30) {
+                            $aHouse = $this->lookupInterpolation($sPointSQL, $iDistance, $iParentPlaceID);

 
 

-               function setIncludePolygonAsKML($b = true)
-               {
-                       $this->bIncludePolygonAsKML = $b;
-               }
-
-               function setIncludePolygonAsSVG($b = true)
-               {
-                       $this->bIncludePolygonAsSVG = $b;
-               }
-
-               function setPolygonSimplificationThreshold($f)
-               {
-                       $this->fPolygonSimplificationThreshold = $f;
-               }
-
-               // returns { place_id =>, type => '(osm|tiger)' }
-               // fails if no place was found
-               function lookup()
-               {
-                       $sPointSQL = 'ST_SetSRID(ST_Point('.$this->fLon.','.$this->fLat.'),4326)';
-                       $iMaxRank = $this->iMaxRank;
-                       $iMaxRank_orig = $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 = $this->oDB->getRow($sSQL);
-                               if (PEAR::IsError($aPlace))
-                               {
-                                       failInternalError("Could not determine closest place.", $sSQL, $aPlace);
-                               }
-                               $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 ($iMaxRank_orig >= 28 && $iPlaceID && ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27 || $aPlace['rank_search'] == 30))
-                       {
-                               $fSearchDiam = 0.001;
-                               if ($aPlace['rank_search'] == 30)
-                               {
-                                       // if a house was found, the closest road needs to be searched, to use its place id as parent_place_id of the interpolation line
-                                       // because a road can be closer to the point than the house from above
-                                       $iRoadID = null;
-                                       while(!$iRoadID && $fSearchDiam < $fMaxAreaDistance)
-                                       {
-                                               $fSearchDiam = $fSearchDiam * 2;
-                                               $sSQL = 'select place_id ';
-                                               $sSQL .= ' FROM placex';
-                                               $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
-                                               $sSQL .= ' and (rank_search = 26 or rank_search = 27)';
-                                               $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')';
-                                               $sSQL .= ' and indexed_status = 0 ';
-                                               $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
-                                               $aPlaceRoad = $this->oDB->getRow($sSQL);
-                                               if (PEAR::IsError($aPlace))
-                                               {
-                                                       failInternalError("Could not determine closest place.", $sSQL, $aPlace);
-                                               }
-                                               $iRoadID = $aPlaceRoad['place_id'];
-                                               $iTempPlaceID = $iRoadID;
-                                       }
-                               }
-                               else
-                               {
-                                       // if a street was found, we can take its place_id as parent_place_id
-                                       $iTempPlaceID = $iPlaceID;
-                               }
-                               $sSQL = 'SELECT place_id, parent_place_id, 30 as rank_search, ST_line_locate_point(linegeo,'.$sPointSQL.') as fraction';
-                               //if (CONST_Debug) { $sSQL .= ', housenumber, ST_distance('.$sPointSQL.', centroid) as distance, st_y(centroid) as lat, st_x(centroid) as lon'; }
-                               $sSQL .= ' FROM location_property_osmline WHERE parent_place_id = '.$iTempPlaceID;
-                               $sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.') 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 = $this->oDB->getAll($sSQL);
-                                       foreach($aAllHouses as $i)
-                                       {
-                                               echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
-                                       }
-                               }
-                               $aPlaceLine = $this->oDB->getRow($sSQL);
-                               if (PEAR::IsError($aPlaceLine))
-                               {
-                                       failInternalError("Could not determine closest housenumber on an osm interpolation line.", $sSQL, $aPlaceLine);
-                               }
-                               $iInterpolationLinePlaceID = $aPlaceLine['place_id'];
-                               if ($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 = $this->oDB->getRow($sSQL);
-                                               if (PEAR::IsError($aDistancePlacex))
-                                               {
-                                                       failInternalError("Could not determine distance between searched point and placex house.", $sSQL, $aDistancePlacex);
-                                               }
-                                               $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';
-                                               $sSQL .= ' FROM location_property_osmline WHERE place_id = '.$iInterpolationLinePlaceID;
-                                               $aDistanceInterpolation = $this->oDB->getRow($sSQL);
-                                               if (PEAR::IsError($aDistanceInterpolation))
-                                               {
-                                                       failInternalError("Could not determine distance between searched point and interpolated house.", $sSQL, $aDistanceInterpolation);
-                                               }
-                                               $fDistanceInterpolation = $aDistanceInterpolation['distance'];
-                                               if ($fDistanceInterpolation < $fDistancePlacex)
-                                               {
-                                                       // interpolation is closer to point than placex house
-                                                       $bPlaceIsLine = true;
-                                                       $aPlace = $aPlaceLine;
-                                                       $iPlaceID = $iInterpolationLinePlaceID;
-                                                       $iParentPlaceID = $aPlaceLine['parent_place_id']; // the street
-                                                       $fFraction = $aPlaceLine['fraction'];
-                                               }
-                                               // 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 = $aPlaceLine['fraction'];
-                                       }
-                               }
-                       }
-                       
-                       // Only street found? If it's in the US we can check TIGER data for nearest housenumber
-                       if ($bIsInUnitedStates && $iMaxRank_orig >= 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 = $this->oDB->getAll($sSQL);
-                                       foreach($aAllHouses as $i)
-                                       {
-                                               echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "<br>\n";
-                                       }
-                               }
-
-                               $aPlaceTiger = $this->oDB->getRow($sSQL);
-                               if (PEAR::IsError($aPlaceTiger))
-                               {
-                                       failInternalError("Could not determine closest Tiger place.", $sSQL, $aPlaceTiger);
-                               }
-                               if ($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 = $aPlaceTiger['fraction'];
-                               }
-                       }
-
-                       // The point we found might be too small - use the address to find what it is a child of
-                       if ($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 = $this->oDB->getOne($sSQL);
-                               if (PEAR::IsError($iPlaceID))
-                               {
-                                       failInternalError("Could not get parent for place.", $sSQL, $iPlaceID);
-                               }
-                               if (!$iPlaceID)
-                               {
-                                       $iPlaceID = $aPlace['place_id'];
-                               }
-                       }
-                       return array('place_id' => $iPlaceID,
-                                               'type' => $bPlaceIsTiger ? 'tiger' : $bPlaceIsLine ? 'interpolation' : 'osm',
-                                               'fraction' => ($bPlaceIsTiger || $bPlaceIsLine) ? $fFraction : -1);
-               }
-               
-       }
-?>
+                            if ($aHouse) {
+                                $oResult = new Result($aHouse['place_id'], Result::TABLE_OSMLINE);
+                                $oResult->iHouseNumber = closestHouseNumber($aHouse);
+                            }
+                        }
+                    }
+                }
+                
+                  // In the US we can check TIGER data for nearest housenumber
+                if (CONST_Use_US_Tiger_Data && $aPlace['country_code'] == 'us' && $this->iMaxRank >= 28) {
+                    $fSearchDiam = $aPlace['rank_address'] > 28 ? $aPlace['distance'] : 0.001;
+                    $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, '.$fSearchDiam.')';
+                    $sSQL .= ' ORDER BY distance ASC limit 1';
+                    if (CONST_Debug) var_dump($sSQL);
+                    $aPlaceTiger = chksql(
+                        $this->oDB->getRow($sSQL),
+                        'Could not determine closest Tiger place.'
+                    );
+                    if ($aPlaceTiger) {
+                        if (CONST_Debug) var_dump('found Tiger housenumber', $aPlaceTiger);
+                        $aPlace = $aPlaceTiger;
+                        $oResult = new Result($aPlace['place_id'], Result::TABLE_TIGER);
+                        $oResult->iHouseNumber = closestHouseNumber($aPlaceTiger);
+                    }
+                }
+            // if no POI or street is found ...
+            } else {
+                $oResult = $this->PolygonFunctions($sPointSQL, $iMaxRank);
+            }
+            // lower than street level ($iMaxRank < 26 )
+        } else {
+            $oResult = $this->PolygonFunctions($sPointSQL, $iMaxRank);
+        }
+        return $oResult;
+    }
+}