Index: /applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/TileRange.java
===================================================================
--- /applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/TileRange.java	(revision 33206)
+++ /applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/TileRange.java	(revision 33206)
@@ -0,0 +1,39 @@
+// License: GPL. For details, see Readme.txt file.
+package org.openstreetmap.gui.jmapviewer;
+
+/**
+ * This is a rectangular range of tiles.
+ */
+public class TileRange {
+    protected int minX;
+    protected int maxX;
+    protected int minY;
+    protected int maxY;
+    protected int zoom;
+
+    protected TileRange() {
+    }
+
+    protected TileRange(TileXY t1, TileXY t2, int zoom) {
+        minX = (int) Math.floor(Math.min(t1.getX(), t2.getX()));
+        minY = (int) Math.floor(Math.min(t1.getY(), t2.getY()));
+        maxX = (int) Math.ceil(Math.max(t1.getX(), t2.getX()));
+        maxY = (int) Math.ceil(Math.max(t1.getY(), t2.getY()));
+        this.zoom = zoom;
+    }
+
+    protected double tilesSpanned() {
+        return Math.sqrt(1.0 * this.size());
+    }
+
+    /**
+     * Returns size
+     * @return size
+     */
+    public int size() {
+        int xSpan = maxX - minX + 1;
+        int ySpan = maxY - minY + 1;
+        return xSpan * ySpan;
+    }
+}
+