Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractOsmTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractOsmTileSource.java	(revision 29882)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractOsmTileSource.java	(revision 29883)
@@ -1,5 +1,2 @@
-/**
- * 
- */
 package org.openstreetmap.gui.jmapviewer.tilesources;
 
@@ -8,4 +5,7 @@
 import org.openstreetmap.gui.jmapviewer.Coordinate;
 
+/**
+ * Abstract clas for OSM Tile sources
+ */
 public abstract class AbstractOsmTileSource extends AbstractTMSTileSource {
     
@@ -15,4 +15,9 @@
     public static final String DEFAULT_OSM_ATTRIBUTION = "\u00a9 OpenStreetMap contributors";
     
+    /**
+     * Constructs a new OSM tile source
+     * @param name Source name as displayed in GUI
+     * @param base_url Source URL
+     */
     public AbstractOsmTileSource(String name, String base_url) {
         super(name, base_url);
@@ -20,5 +25,5 @@
 
     public int getMaxZoom() {
-        return 18;
+        return 19;
     }
 
Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/OsmTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/OsmTileSource.java	(revision 29882)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/OsmTileSource.java	(revision 29883)
@@ -55,5 +55,5 @@
         @Override
         public int getMaxZoom() {
-            return 19;
+            return 18;
         }