docs

src/org/oscim/core/MercatorProjection.java

@@ -82,6 +82,12 @@ public final class MercatorProjection {
 				* ((long) Tile.TILE_SIZE << mapPosition.zoomLevel);
 	}
 
+	/**
+	 * Projects a longitude coordinate (in degrees) to the range [0.0,1.0]
+	 * @param latitude
+	 *            the latitude coordinate that should be converted.
+	 * @return the position .
+	 */
 	public static double latitudeToY(double latitude) {
 		double sinLatitude = Math.sin(latitude * (Math.PI / 180));
 		return 0.5 - Math.log((1 + sinLatitude) / (1 - sinLatitude)) / (4 * Math.PI);
@@ -147,6 +153,12 @@ public final class MercatorProjection {
 				* ((long) Tile.TILE_SIZE << mapPosition.zoomLevel);
 	}
 
+	/**
+	 * Projects a longitude coordinate (in degrees) to the range [0.0,1.0]
+	 * @param longitude
+	 *            the longitude coordinate that should be converted.
+	 * @return the position .
+	 */
 	public static double longitudeToX(double longitude) {
 		return (longitude + 180) / 360;
 	}

src/org/oscim/renderer/overlays/CustomOverlay.java

@@ -26,8 +26,12 @@ import org.oscim.view.MapView;
 import android.opengl.GLES20;
 import android.opengl.Matrix;
 
-// http://safari.informit.com/9780321563835
+/*
-// http://www.opengles-book.com
+ * This is an example how to integrate custom OpenGL drawing routines as map overlay
+ * 
+ * based on chapter 2 from:
+ * https://github.com/dalinaum/opengl-es-book-samples/tree/master/Android
+ * */
 
 public class CustomOverlay extends RenderOverlay {