Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/OsmTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/OsmTileSource.java	(revision 25217)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/OsmTileSource.java	(revision 25265)
@@ -99,4 +99,24 @@
             return "http://openstreetmap.org/";
         }
+
+        public double latToTileY(double lat, int zoom) {
+	    double l = lat / 180 * Math.PI;
+	    double pf = Math.log(Math.tan(l) + (1 / Math.cos(l)));
+	    return Math.pow(2.0, zoom - 1) * (Math.PI - pf) / Math.PI;
+        }
+
+        public double lonToTileX(double lon, int zoom) {
+	    return Math.pow(2.0, zoom - 3) * (lon + 180.0) / 45.0;
+        }
+
+        public double tileYToLat(int y, int zoom) {
+	    return Math.atan(Math.sinh(Math.PI
+                - (Math.PI * y / Math.pow(2.0, zoom - 1))))
+                * 180 / Math.PI;
+        }
+
+        public double tileXToLon(int x, int zoom) {
+	    return x * 45.0 / Math.pow(2.0, zoom - 3) - 180.0;
+        }
     }
 
Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/ScanexIRSTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/ScanexIRSTileSource.java	(revision 25265)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/ScanexIRSTileSource.java	(revision 25265)
@@ -0,0 +1,102 @@
+package org.openstreetmap.gui.jmapviewer;
+
+import java.awt.Image;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import javax.imageio.ImageIO;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.DefaultHandler;
+import org.xml.sax.helpers.XMLReaderFactory;
+
+public class ScanexIRSTileSource extends OsmTileSource.AbstractOsmTileSource {
+    private static String API_KEY = "4018C5A9AECAD8868ED5DEB2E41D09F7";
+    private static String BASE_URI = "/TileSender.ashx?ModeKey=tile&MapName=F7B8CF651682420FA1749D894C8AD0F6&LayerName=BAC78D764F0443BD9AF93E7A998C9F5B";
+
+    public ScanexIRSTileSource() {
+        super("IRS satellite imagery", "http://maps.kosmosnimki.ru");
+    }
+
+    @Override
+    public int getMaxZoom() {
+        return 14;
+    }
+
+    @Override
+    public String getExtension() {
+        return("jpeg");
+    }
+
+    @Override
+    public String getTilePath(int zoom, int tilex, int tiley) {
+	int tmp = (int)Math.pow(2.0, zoom - 1);
+
+	tilex = tilex - tmp;
+	tiley = tmp - tiley - 1;
+
+	return BASE_URI + "&apikey=" + API_KEY + "&x=" + tilex + "&y=" + tiley + "&z=" + zoom;
+    }
+
+    public TileUpdate getTileUpdate() {
+        return TileUpdate.IfNoneMatch;
+    }
+
+    private static double RADIUS_E = 6378137;	/* radius of Earth at equator, m */
+    private static double EQUATOR = 40075016.68557849; /* equator length, m */
+    private static double E = 0.0818191908426;	/* eccentricity of Earth's ellipsoid */
+
+    @Override
+    public double latToTileY(double lat, int zoom) {
+        double tmp = Math.tan(Math.PI/4 * (1 + lat/90));
+        double pow = Math.pow(Math.tan(Math.PI/4 + Math.asin(E * Math.sin(Math.toRadians(lat)))/2), E);
+
+	return (EQUATOR/2 - (RADIUS_E * Math.log(tmp/pow))) * Math.pow(2.0, zoom) / EQUATOR;
+    }
+
+    @Override
+    public double lonToTileX(double lon, int zoom) {
+	return (RADIUS_E * lon * Math.PI / (90*EQUATOR) + 1) * Math.pow(2.0, zoom - 1);
+    }
+
+    /*
+     * DIRTY HACK ALERT!
+     *
+     * Until I can't solve the equation, use dihotomy :(
+     */
+    @Override
+    public double tileYToLat(int y, int zoom) {
+	double lat = 0;
+	double minl = OsmMercator.MIN_LAT;
+	double maxl = OsmMercator.MAX_LAT;
+	double c;
+
+	for (int i=0; i < 60; i++) {
+		c = latToTileY(lat, zoom);
+		if (c < y) {
+			maxl = lat;
+			lat -= (lat - minl)/2;
+		} else {
+			minl = lat;
+			lat += (maxl - lat)/2;
+		}
+	}
+
+	return lat;
+    }
+
+    @Override
+    public double tileXToLon(int x, int zoom) {
+        return (x / Math.pow(2.0, zoom - 1) - 1) * (90*EQUATOR) / RADIUS_E / Math.PI;
+    }
+}
Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileSource.java	(revision 25217)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileSource.java	(revision 25265)
@@ -124,3 +124,11 @@
      */
     public String getTermsOfUseURL();
+
+    public double latToTileY(double lat, int zoom);
+
+    public double lonToTileX(double lon, int zoom);
+     
+    public double tileYToLat(int y, int zoom);
+            
+    public double tileXToLon(int x, int zoom);
 }