Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLayerSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLayerSource.java	(revision 9622)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLayerSource.java	(revision 9622)
@@ -0,0 +1,30 @@
+package org.openstreetmap.gui.jmapviewer.interfaces;
+
+//License: GPL. Copyright 2008 by Jan Peter Stotz
+
+/**
+ * 
+ * @author Jan Peter Stotz
+ */
+public interface TileLayerSource {
+
+	/**
+	 * Specifies the maximum zoom value. The number of zoom levels is [0..{@link #getMaxZoom()}] 
+	 *  
+	 * @return maximum zoom value
+	 */
+	public int getMaxZoom();
+	
+	/**
+	 * @return Name of the tile layer 
+	 */
+	public String getName();
+	
+	/**
+	 * @param zoom
+	 * @param tilex
+	 * @param tiley
+	 * @return fully qualified url for downloading the specified tile image
+	 */
+	public String getTileUrl(int zoom, int tilex, int tiley);
+}