add documentation of special phrases CSV format

[nominatim.git] / lib-php / ReverseGeocode.php

diff --git a/lib-php/ReverseGeocode.php b/lib-php/ReverseGeocode.php
index 2aea90387a57d07d669b16f1ae9ed1a7347da729..f6ea590fb7c6cfa451f75952fde894a39f34dceb 100644 (file)
--- a/lib-php/ReverseGeocode.php
+++ b/lib-php/ReverseGeocode.php
@@ -40,10 +40,10 @@ class ReverseGeocode
                       9 => 12,
                       10 => 17, // City
                       11 => 17,
-                      12 => 18, // Town / Village
-                      13 => 18,
-                      14 => 22, // Suburb
-                      15 => 22,
+                      12 => 18, // Town
+                      13 => 19, // Village
+                      14 => 22, // Neighbourhood
+                      15 => 25, // Locality
                       16 => 26, // major street
                       17 => 27, // minor street
                       18 => 30, // or >, Building
@@ -85,6 +85,11 @@ class ReverseGeocode
 
     protected function lookupLargeArea($sPointSQL, $iMaxRank)
     {
+        $sCountryCode = $this->getCountryCode($sPointSQL);
+        if (CONST_Search_WithinCountries and $sCountryCode == null) {
+            return  null;
+        }
+
         if ($iMaxRank > 4) {
             $aPlace = $this->lookupPolygon($sPointSQL, $iMaxRank);
             if ($aPlace) {
@@ -94,12 +99,12 @@ class ReverseGeocode
 
         // If no polygon which contains the searchpoint is found,
         // searches in the country_osm_grid table for a polygon.
-        return  $this->lookupInCountry($sPointSQL, $iMaxRank);
+        return  $this->lookupInCountry($sPointSQL, $iMaxRank, $sCountryCode);
     }
 
-    protected function lookupInCountry($sPointSQL, $iMaxRank)
+    protected function getCountryCode($sPointSQL)
     {
-        Debug::newFunction('lookupInCountry');
+        Debug::newFunction('getCountryCode');
         // 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';
@@ -111,8 +116,12 @@ class ReverseGeocode
             null,
             'Could not determine country polygon containing the point.'
         );
-        Debug::printVar('Country code', $sCountryCode);
+        return $sCountryCode;
+    }
 
+    protected function lookupInCountry($sPointSQL, $iMaxRank, $sCountryCode)
+    {
+        Debug::newFunction('lookupInCountry');
         if ($sCountryCode) {
             if ($iMaxRank > 4) {
                 // look for place nodes with the given country code
@@ -122,12 +131,13 @@ class ReverseGeocode
                 $sSQL .= ' FROM placex';
                 $sSQL .= ' WHERE osm_type = \'N\'';
                 $sSQL .= ' AND country_code = \''.$sCountryCode.'\'';
-                $sSQL .= ' AND rank_search < 26 '; // needed to select right index
+                $sSQL .= ' AND rank_address between 4 and 25'; // needed to select right index
                 $sSQL .= ' AND rank_search between 5 and ' .min(25, $iMaxRank);
-                $sSQL .= ' AND class = \'place\' AND type != \'postcode\'';
+                $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, 1.8)) p ';
+                $sSQL .= ' AND ST_Buffer(geometry, reverse_place_diameter(rank_search)) && '.$sPointSQL;
+                $sSQL .= ') as a ';
                 $sSQL .= 'WHERE distance <= reverse_place_diameter(rank_search)';
                 $sSQL .= ' ORDER BY rank_search DESC, distance ASC';
                 $sSQL .= ' LIMIT 1';
@@ -189,14 +199,16 @@ class ReverseGeocode
         $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;
+        // Ensure that query planner doesn't use the index on rank_search.
+        $sSQL .= ' AND coalesce(rank_search, 0) between 5 and ' .$iMaxRank;
+        $sSQL .= ' AND rank_address between 4 and 25'; // needed for index selection
         $sSQL .= ' AND geometry && '.$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';
+        $sSQL .= ' ORDER BY rank_search DESC LIMIT 50 ) as a';
+        $sSQL .= ' WHERE ST_Contains(geometry, '.$sPointSQL.' )';
+        $sSQL .= ' ORDER BY rank_search DESC LIMIT 1';
         Debug::printSQL($sSQL);
 
         $aPoly = $this->oDB->getRow($sSQL, null, 'Could not determine polygon containing the point.');
@@ -208,29 +220,24 @@ class ReverseGeocode
             $iRankSearch = $aPoly['rank_search'];
             $iPlaceID = $aPoly['place_id'];
 
-            if ($iRankAddress != $iMaxRank) {
+            if ($iRankSearch != $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 rank_search < 26 '; // needed to select right index
-                $sSQL .= ' AND rank_address > 0';
-                $sSQL .= ' AND class = \'place\'';
+                $sSQL .= ' AND rank_address between 4 and 25';  // needed to select right index
                 $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 )';
+                $sSQL .= ' AND ST_Buffer(geometry, reverse_place_diameter(rank_search)) && '.$sPointSQL;
+                $sSQL .= ' ORDER BY rank_search DESC, distance ASC';
+                $sSQL .= ' limit 100) 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 .= ' ORDER BY rank_search DESC, distance ASC';
                 $sSQL .= ' LIMIT 1';
                 Debug::printSQL($sSQL);