diff --git a/vtm/src/org/oscim/layers/marker/ClusterMarkerRenderer.java b/vtm/src/org/oscim/layers/marker/ClusterMarkerRenderer.java
index 5d26a299..f91b9bac 100644
--- a/vtm/src/org/oscim/layers/marker/ClusterMarkerRenderer.java
+++ b/vtm/src/org/oscim/layers/marker/ClusterMarkerRenderer.java
@@ -2,7 +2,7 @@
  * Copyright 2013 Hannes Janetzek
  * Copyright 2016 Izumi Kawashima
  * Copyright 2017 Longri
- * Copyright 2017 devemux86
+ * Copyright 2017-2018 devemux86
  * Copyright 2017 nebular
  * Copyright 2017 Wolfgang Schramm
  *
@@ -243,7 +243,8 @@ public class ClusterMarkerRenderer extends MarkerRenderer {
         //int changedVisible = 0;
         int numVisible = 0;
 
-        mMarkerLayer.map().viewport().getMapExtents(mBox, mExtents);
+        // Increase view to show items that are partially visible
+        mMarkerLayer.map().viewport().getMapExtents(mBox, Tile.SIZE / 2);
 
         long flip = (long) (Tile.SIZE * v.pos.scale) >> 1;
 
diff --git a/vtm/src/org/oscim/layers/marker/ItemizedLayer.java b/vtm/src/org/oscim/layers/marker/ItemizedLayer.java
index 8dcf5165..bd7f6df6 100644
--- a/vtm/src/org/oscim/layers/marker/ItemizedLayer.java
+++ b/vtm/src/org/oscim/layers/marker/ItemizedLayer.java
@@ -24,6 +24,7 @@ package org.oscim.layers.marker;
 import org.oscim.backend.CanvasAdapter;
 import org.oscim.core.Box;
 import org.oscim.core.Point;
+import org.oscim.core.Tile;
 import org.oscim.event.Gesture;
 import org.oscim.event.GestureListener;
 import org.oscim.event.MotionEvent;
@@ -190,7 +191,7 @@ public class ItemizedLayer<Item extends MarkerInterface> extends MarkerLayer<Ite
         int eventY = (int) event.getY() - mMap.getHeight() / 2;
         Viewport mapPosition = mMap.viewport();
 
-        Box box = mapPosition.getBBox(null, 128);
+        Box box = mapPosition.getBBox(null, Tile.SIZE / 2);
         box.map2mercator();
         box.scale(1E6);
 
diff --git a/vtm/src/org/oscim/layers/marker/MarkerRenderer.java b/vtm/src/org/oscim/layers/marker/MarkerRenderer.java
index 342af4e8..463d75e7 100644
--- a/vtm/src/org/oscim/layers/marker/MarkerRenderer.java
+++ b/vtm/src/org/oscim/layers/marker/MarkerRenderer.java
@@ -2,7 +2,7 @@
  * Copyright 2013 Hannes Janetzek
  * Copyright 2016 Izumi Kawashima
  * Copyright 2017 Longri
- * Copyright 2017 devemux86
+ * Copyright 2017-2018 devemux86
  * Copyright 2017 nebular
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
@@ -41,11 +41,6 @@ public class MarkerRenderer extends BucketRenderer {
     protected final MarkerLayer<MarkerInterface> mMarkerLayer;
     protected final Point mMapPoint = new Point();
 
-    /**
-     * increase view to show items that are partially visible
-     */
-    protected int mExtents = 100;
-
     /**
      * flag to force update of markers
      */
@@ -74,7 +69,8 @@ public class MarkerRenderer extends BucketRenderer {
         //int changedVisible = 0;
         int numVisible = 0;
 
-        mMarkerLayer.map().viewport().getMapExtents(mBox, mExtents);
+        // Increase view to show items that are partially visible
+        mMarkerLayer.map().viewport().getMapExtents(mBox, Tile.SIZE / 2);
 
         long flip = (long) (Tile.SIZE * v.pos.scale) >> 1;