using ST_ClosestPoint and a subquery

diff --git a/lib/PlaceLookup.php b/lib/PlaceLookup.php
index 93ffd6a0945ae708b04be1700ea6e2bc91d33562..ca7a48cf7931ab94b0b0ae12ebcedab93eb12d6e 100644 (file)
--- a/lib/PlaceLookup.php
+++ b/lib/PlaceLookup.php
@@ -536,28 +536,27 @@ class PlaceLookup
 
         if (CONST_Search_AreaPolygons) {
             // Get the bounding box and outline polygon
-            $sSQL = 'select place_id,0 as numfeatures,st_area(geometry) as area,'; 
-            if ($fLonReverse != null && $fLatReverse != null) { 
-                $sSQL .= ' CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN'; 
-                $sSQL .= ' ST_Y(ST_LineInterpolatePoint(geometry,'; 
-                $sSQL .= ' ST_LineLocatePoint(geometry, ST_SetSRID(ST_Point('.$fLatReverse.','.$fLonReverse.'),4326))))'; 
-                $sSQL .= ' ELSE ST_Y(centroid) '; 
-                $sSQL .= ' END as centrelat, '; 
-                $sSQL .= ' CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN'; 
-                $sSQL .= ' ST_X(ST_LineInterpolatePoint(geometry,'; 
-                $sSQL .= ' ST_LineLocatePoint(geometry, ST_SetSRID(ST_Point('.$fLatReverse.','.$fLonReverse.'),4326))))'; 
-                $sSQL .= ' ELSE ST_X(centroid) '; 
-                $sSQL .= ' END as centrelon, '; 
-            } else { 
-                $sSQL .= ' ST_Y(centroid) as centrelat, ST_X(centroid) as centrelon,'; 
-            } 
-            $sSQL .= ' ST_YMin(geometry) as minlat,ST_YMax(geometry) as maxlat,'; 
-            $sSQL .= ' ST_XMin(geometry) as minlon,ST_XMax(geometry) as maxlon'; 
+            $sSQL = 'select place_id,0 as numfeatures,st_area(geometry) as area,';
+            if ($fLonReverse != null && $fLatReverse != null) {
+                $sSQL .= ' CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN';
+                $sSQL .= ' ST_Y(closest_point)';
+                $sSQL .= ' ELSE ST_Y(centroid) ';
+                $sSQL .= ' END as centrelat, ';
+                $sSQL .= ' CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN';
+                $sSQL .= ' ST_X(closest_point)';
+                $sSQL .= ' ELSE ST_X(centroid) ';
+                $sSQL .= ' END as centrelon, ';
+            } else {
+                $sSQL .= ' ST_Y(centroid) as centrelat, ST_X(centroid) as centrelon,';
+            }
+            $sSQL .= ' ST_YMin(geometry) as minlat,ST_YMax(geometry) as maxlat,';
+            $sSQL .= ' ST_XMin(geometry) as minlon,ST_XMax(geometry) as maxlon';
             if ($this->bIncludePolygonAsGeoJSON) $sSQL .= ',ST_AsGeoJSON(geometry) as asgeojson';
             if ($this->bIncludePolygonAsKML) $sSQL .= ',ST_AsKML(geometry) as askml';
             if ($this->bIncludePolygonAsSVG) $sSQL .= ',ST_AsSVG(geometry) as assvg';
             if ($this->bIncludePolygonAsText || $this->bIncludePolygonAsPoints) $sSQL .= ',ST_AsText(geometry) as astext';
-            $sFrom = ' from placex where place_id = '.$iPlaceID;
+            $sFrom = ' from (SELECT * , ST_ClosestPoint(geometry, ST_SetSRID(ST_Point('.$fLatReverse.','.$fLonReverse.'),4326)) AS closest_point';
+            $sFrom .= ' from placex where place_id = '.$iPlaceID.') as plx';
             if ($this->fPolygonSimplificationThreshold > 0) {
                 $sSQL .= ' from (select place_id,centroid,ST_SimplifyPreserveTopology(geometry,'.$this->fPolygonSimplificationThreshold.') as geometry'.$sFrom.') as plx';
             } else {