diff --git a/src/org/mapsforge/android/MapView.java b/src/org/mapsforge/android/MapView.java
index a04a0ff0..290b3576 100644
--- a/src/org/mapsforge/android/MapView.java
+++ b/src/org/mapsforge/android/MapView.java
@@ -420,7 +420,7 @@ public class MapView extends GLSurfaceView {
 			return true;
 		}
 		mMapFile = null;
-		clearAndRedrawMapView();
+		// clearAndRedrawMapView();
 		Log.d(TAG, "loading mapfile failed");
 		return false;
 	}
diff --git a/src/org/mapsforge/android/glrenderer/DatabaseRenderer.java b/src/org/mapsforge/android/glrenderer/DatabaseRenderer.java
index 243386d9..c3bcf921 100644
--- a/src/org/mapsforge/android/glrenderer/DatabaseRenderer.java
+++ b/src/org/mapsforge/android/glrenderer/DatabaseRenderer.java
@@ -205,13 +205,13 @@ public class DatabaseRenderer implements MapGenerator, RenderCallback,
 		boolean closed = (wayNodes[0] == wayNodes[len - 2] &&
 				wayNodes[1] == wayNodes[len - 1]);
 
-		mSimplify = 2.5f;
+		mSimplify = 0.5f;
 
 		if (closed) {
 			if (mCurrentTile.zoomLevel < 14)
-				mSimplify = 1.5f;
-			else
 				mSimplify = 0.5f;
+			else
+				mSimplify = 0.2f;
 
 			if (tags.length == 1 && "water".equals(tags[0].value))
 				mSimplify = 0;
diff --git a/src/org/mapsforge/tilemap/TileMap.java b/src/org/mapsforge/tilemap/TileMap.java
index e58ee17a..27124e25 100755
--- a/src/org/mapsforge/tilemap/TileMap.java
+++ b/src/org/mapsforge/tilemap/TileMap.java
@@ -610,7 +610,7 @@ public class TileMap extends MapActivity implements ActionBar.OnNavigationListen
 			if (mMapView.getMapFile() == null)
 				startMapFilePicker();
 		} else {
-			mMapView.setMapFile(null);
+			mMapView.setMapFile(mMapView.getMapFile());
 		}
 	}