Add polygon simplification

[nominatim.git] / lib / Geocode.php

diff --git a/lib/Geocode.php b/lib/Geocode.php
index 7bd4f55295513518794abbcc5e91405a3b2c9a69..a5454867c17939a9c6abd27486974d2014e7afdc 100644 (file)
--- a/lib/Geocode.php
+++ b/lib/Geocode.php
@@ -12,6 +12,7 @@
                protected $bIncludePolygonAsGeoJSON = false;
                protected $bIncludePolygonAsKML = false;
                protected $bIncludePolygonAsSVG = false;
+               protected $fPolygonSimplificationThreshold = 0.0;
 
                protected $aExcludePlaceIDs = array();
                protected $bDeDupe = true;
@@ -102,6 +103,11 @@
                        $this->bIncludePolygonAsSVG = $b;
                }
 
+               function setPolygonSimplificationThreshold($f)
+               {
+                       $this->fPolygonSimplificationThreshold = $f;
+               }
+
                function setDeDupe($bDeDupe = true)
                {
                        $this->bDeDupe = (bool)$bDeDupe;
@@ -1612,7 +1618,7 @@
                                        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";
-                                       $sSQL .= " from placex where place_id = ".$aResult['place_id'];
+                                       $sSQL .= " from (select place_id,centroid,ST_SimplifyPreserveTopology(geometry,".$this->fPolygonSimplificationThreshold.") as geometry from placex where place_id = ".$aResult['place_id'].") as plx";
                                        $aPointPolygon = $this->oDB->getRow($sSQL);
                                        if (PEAR::IsError($aPointPolygon))
                                        {