diff --git a/sdi-plugins/src/main/java/org/gcube/application/cms/sdi/plugins/SDIIndexerPlugin.java b/sdi-plugins/src/main/java/org/gcube/application/cms/sdi/plugins/SDIIndexerPlugin.java
index 8d2d43a..e2d0603 100644
--- a/sdi-plugins/src/main/java/org/gcube/application/cms/sdi/plugins/SDIIndexerPlugin.java
+++ b/sdi-plugins/src/main/java/org/gcube/application/cms/sdi/plugins/SDIIndexerPlugin.java
@@ -150,8 +150,8 @@ public class SDIIndexerPlugin extends SDIAbstractPlugin implements IndexerPlugin
                 GCubeSDILayer.BBOX bbox = GCubeSDILayer.BBOX.fromGeoJSON(object.getBbox());
 
                 log.info("Found declared BBOX {} ", bbox);
-                Double pointX = (bbox.getMaxX() - bbox.getMinX());
-                Double pointY = bbox.getMaxY() - bbox.getMinY();
+                Double pointX = (bbox.getMaxX() + bbox.getMinX())/2;
+                Double pointY = (bbox.getMaxY() + bbox.getMinY())/2;
                 String wkt = String.format("POINT (%1$f %2$f) ",
                         pointX, pointY);
 
@@ -183,8 +183,8 @@ public class SDIIndexerPlugin extends SDIAbstractPlugin implements IndexerPlugin
                 if(toSet== null)
                     throw new IndexingException("No BBOX has been evaluated from project");
 
-                Double pointX=(toSet.getMaxX()-toSet.getMinX());
-                Double pointY = toSet.getMaxY()-toSet.getMinY();
+                Double pointX=(toSet.getMaxX()+toSet.getMinX())/2;
+                Double pointY = (toSet.getMaxY()+toSet.getMinY())/2;
                 log.info("Evaluated BBOX {} ",toSet);
                 String wkt = String .format("POINT (%1$f %2$f) ",
                         pointX, pointY);