diff --git a/src/org/oscim/renderer/BaseMap.java b/src/org/oscim/renderer/BaseMap.java
index 98bfd458..54199d3f 100644
--- a/src/org/oscim/renderer/BaseMap.java
+++ b/src/org/oscim/renderer/BaseMap.java
@@ -25,19 +25,23 @@ import org.oscim.utils.GlUtils;
 
 import android.opengl.GLES20;
 import android.opengl.Matrix;
+import android.util.Log;
 
 /**
  * @author Hannes Janetzek
  */
 public class BaseMap {
-	//private final static String TAG = BaseMap.class.getName();
+	private final static String TAG = BaseMap.class.getName();
+
+	private static float[] mMVPMatrix = new float[16];
+	private static float[] mVPMatrix = new float[16];
+	private static float[] mfProjMatrix = new float[16];
+
+	// used to increase polygon-offset for each tile drawn.
+	private static int mDrawCnt;
 
 	// used to not draw a tile twice per frame.
 	private static int mDrawSerial = 0;
-	private static float[] mMVPMatrix = new float[16];
-
-	private static float[] mVPMatrix = new float[16];
-	private static float[] mfProjMatrix = new float[16];
 
 	static void setProjection(float[] projMatrix) {
 		System.arraycopy(projMatrix, 0, mfProjMatrix, 0, 16);
@@ -46,43 +50,45 @@ public class BaseMap {
 		mfProjMatrix[14] = 0;
 	}
 
-	private static int mDrawCnt;
-
 	static void draw(MapTile[] tiles, int tileCnt, MapPosition pos) {
-		//long start = SystemClock.uptimeMillis();
-		Matrix.multiplyMM(mVPMatrix, 0, mfProjMatrix, 0, pos.viewMatrix, 0);
 		mDrawCnt = 0;
 
+		Matrix.multiplyMM(mVPMatrix, 0, mfProjMatrix, 0, pos.viewMatrix, 0);
+
 		GLES20.glDepthFunc(GLES20.GL_LESS);
+
+		// load texture for line caps
 		LineRenderer.beginLines();
 
+		// Draw visible tiles
 		for (int i = 0; i < tileCnt; i++) {
 			MapTile t = tiles[i];
 			if (t.isVisible && t.state == STATE_READY)
 				drawTile(t, pos);
 		}
 
-		// proxies are clipped to the region where nothing was drawn to depth buffer.
-		// draw child or parent proxies.
-		// TODO draw proxies for placeholder...
+		// Draw parent or children as proxy for visibile tiles that dont
+		// have data yet. Proxies are clipped to the region where nothing
+		// was drawn to depth buffer.
+		// TODO draw proxies for placeholder
 		for (int i = 0; i < tileCnt; i++) {
 			MapTile t = tiles[i];
 			if (t.isVisible && (t.state != STATE_READY) && (t.holder == null))
 				drawProxyTile(t, pos, true);
 		}
 
-		// draw grandparents
+		// Draw grandparents
 		for (int i = 0; i < tileCnt; i++) {
 			MapTile t = tiles[i];
 			if (t.isVisible && (t.state != STATE_READY) && (t.holder == null))
 				drawProxyTile(t, pos, false);
 		}
 
-		LineRenderer.endLines();
-		glStencilMask(0x0);
+		// make sure stencil buffer write is disabled
+		glStencilMask(0x00);
+
+		LineRenderer.endLines();
 
-		//long end = SystemClock.uptimeMillis();
-		//Log.d(TAG, "base took " + (end - start));
 		mDrawSerial++;
 	}
 
@@ -93,23 +99,24 @@ public class BaseMap {
 
 		tile.lastDraw = mDrawSerial;
 
-		float[] mvp = mMVPMatrix;
-
-		//setMatrix(mvp, tile, div, pos);
-
 		MapTile t = tile;
 		if (t.holder != null)
 			t = t.holder;
 
 		if (t.layers == null || t.vbo == null) {
-			//Log.d(TAG, "missing data " + (t.layers == null) + " " + (t.vbo == null));
+			Log.d(TAG, "missing data " + (t.layers == null) + " " + (t.vbo == null));
 			return;
 		}
-		// set Model matrix for tile
+
+		GLES20.glBindBuffer(GL_ARRAY_BUFFER, t.vbo.id);
+
+		// place tile relative to map position
 		float div = FastMath.pow(tile.zoomLevel - pos.zoomLevel);
 		float x = (float) (tile.pixelX - pos.x * div);
 		float y = (float) (tile.pixelY - pos.y * div);
 		float scale = pos.scale / div;
+
+		float[] mvp = mMVPMatrix;
 		GlUtils.setTileMatrix(mvp, x, y, scale);
 
 		// add view-projection matrix
@@ -120,12 +127,11 @@ public class BaseMap {
 		if (mDrawCnt > 20)
 			mDrawCnt = 0;
 
-		GLES20.glBindBuffer(GL_ARRAY_BUFFER, t.vbo.id);
-
-		boolean clipped = false;
 		// simple line shader does not take forward shortening into account
 		int simpleShader = (pos.tilt < 1 ? 1 : 0);
 
+		boolean clipped = false;
+
 		for (Layer l = t.layers.layers; l != null;) {
 			switch (l.type) {
 				case Layer.POLYGON:
diff --git a/src/org/oscim/renderer/BufferObject.java b/src/org/oscim/renderer/BufferObject.java
index 91d5ef77..1729478b 100644
--- a/src/org/oscim/renderer/BufferObject.java
+++ b/src/org/oscim/renderer/BufferObject.java
@@ -48,7 +48,6 @@ public final class BufferObject {
 						prev.next = bo.next;
 
 					bo.next = null;
-					//Log.d(TAG, "requested: " + size + " got " + bo.size);
 					return bo;
 				}
 				prev = bo;
diff --git a/src/org/oscim/renderer/LineRenderer.java b/src/org/oscim/renderer/LineRenderer.java
index 484effd0..365d987b 100644
--- a/src/org/oscim/renderer/LineRenderer.java
+++ b/src/org/oscim/renderer/LineRenderer.java
@@ -42,12 +42,10 @@ public final class LineRenderer {
 	private final static String TAG = "LineRenderer";
 
 	private static final int LINE_VERTICES_DATA_POS_OFFSET = 0;
-	//private static final int LINE_VERTICES_DATA_TEX_OFFSET = 4;
 
 	// shader handles
 	private static int[] lineProgram = new int[2];
 	private static int[] hLineVertexPosition = new int[2];
-	//private static int[] hLineTexturePosition = new int[2];
 	private static int[] hLineColor = new int[2];
 	private static int[] hLineMatrix = new int[2];
 	private static int[] hLineScale = new int[2];
@@ -77,7 +75,6 @@ public final class LineRenderer {
 			hLineColor[i] = glGetUniformLocation(lineProgram[i], "u_color");
 			hLineMode[i] = glGetUniformLocation(lineProgram[i], "u_mode");
 			hLineVertexPosition[i] = glGetAttribLocation(lineProgram[i], "a_pos");
-			//hLineTexturePosition[i] = glGetAttribLocation(lineProgram[i], "a_st");
 		}
 
 		// create lookup table as texture for 'length(0..1,0..1)'
diff --git a/src/org/oscim/renderer/MapTile.java b/src/org/oscim/renderer/MapTile.java
index 97894b36..37632f50 100644
--- a/src/org/oscim/renderer/MapTile.java
+++ b/src/org/oscim/renderer/MapTile.java
@@ -21,36 +21,27 @@ import org.oscim.renderer.layer.TextItem;
 public final class MapTile extends JobTile {
 
 	/**
-	 * VBO layout: - 16 bytes fill coordinates, n bytes polygon vertices, m
-	 * bytes lines vertices
+	 * VBO holds all vertex data to draw lines and polygons
+	 * layout:
+	 * 16 bytes fill coordinates,
+	 * n bytes polygon vertices,
+	 * m bytes lines vertices
 	 */
 	BufferObject vbo;
 
-	// TextTexture texture;
-
 	/**
-	 * Tile data set by TileGenerator:
+	 * Tile data set by TileGenerator.
 	 */
 	public TextItem labels;
 	public Layers layers;
 
 	/**
-	 * tile has new data to upload to gl
-	 */
-	//boolean newData;
-
-	/**
-	 * tile is loaded and ready for drawing.
-	 */
-	//boolean isReady;
-
-	/**
-	 * tile is in view region.
+	 * Tile is in view region. Set by GLRenderer.
 	 */
 	public boolean isVisible;
 
 	/**
-	 * pointer to access relatives in QuadTree
+	 * Pointer to access relatives in QuadTree
 	 */
 	public QuadTree rel;
 
@@ -68,18 +59,20 @@ public final class MapTile extends JobTile {
 	public byte proxies;
 
 	// check which labels were joined
-	public final static int JOIN_T = 1 << 0;
-	public final static int JOIN_B = 1 << 1;
-	public final static int JOIN_L = 1 << 2;
-	public final static int JOIN_R = 1 << 3;
-	public final static int JOINED = 15;
-	public byte joined;
+	//	public final static int JOIN_T = 1 << 0;
+	//	public final static int JOIN_B = 1 << 1;
+	//	public final static int JOIN_L = 1 << 2;
+	//	public final static int JOIN_R = 1 << 3;
+	//	public final static int JOINED = 15;
+	//	public byte joined;
 
 	// counting the tiles that use this tile as proxy
 	byte refs;
+
+	// up to 255 Threads may lock a tile
 	byte locked;
 
-	// used when this tile sits in fo another tile.
+	// only used GLRenderer when this tile sits in for another tile.
 	// e.g. x:-1,y:0,z:1 for x:1,y:0
 	MapTile holder;
 
diff --git a/src/org/oscim/renderer/PolygonRenderer.java b/src/org/oscim/renderer/PolygonRenderer.java
index 8552f612..c26d1f02 100644
--- a/src/org/oscim/renderer/PolygonRenderer.java
+++ b/src/org/oscim/renderer/PolygonRenderer.java
@@ -45,7 +45,7 @@ import org.oscim.utils.GlUtils;
 import android.opengl.GLES20;
 
 public final class PolygonRenderer {
-	private static final String TAG = PolygonRenderer.class.getName();
+	//private static final String TAG = PolygonRenderer.class.getName();
 
 	private static final int POLYGON_VERTICES_DATA_POS_OFFSET = 0;
 	private static final int STENCIL_BITS = 8;
@@ -374,31 +374,6 @@ public final class PolygonRenderer {
 			+ "  gl_FragColor = u_color;"
 			+ "}";
 
-	private final static String polygonTexVertexShader = ""
-			+ "precision mediump float;"
-			+ "uniform mat4 u_mvp;"
-			+ "attribute vec4 a_pos;"
-			+ "varying vec2 v_st;"
-			+ "void main() {"
-			+ "  if(gl_VertexID == 0)"
-			+ "    v_st = vec2(0.0,0.0);"
-			+ "  else if(gl_VertexID == 1)"
-			+ "    v_st = vec2(1.0,0.0);"
-			+ "  else if(gl_VertexID == 2)"
-			+ "    v_st = vec2(1.0,1.0);"
-			+ "  else if(gl_VertexID == 3)"
-			+ "    v_st = vec2(0.0,1.0);"
-			+ "  gl_Position = u_mvp * a_pos;"
-			+ "}";
-	private final static String polygonTexFragmentShader = ""
-			+ "precision mediump float;"
-			+ "uniform vec4 u_color;"
-			+ "uniform sampler2D tex;"
-			+ "varying vec2 v_st;"
-			+ "void main() {"
-			+ "  gl_FragColor =  u_color * texture2D(tex, v_st);"
-			+ "}";
-
 	private final static String polygonVertexShaderZ = ""
 			+ "precision highp float;"
 			+ "uniform mat4 u_mvp;"
@@ -422,4 +397,29 @@ public final class PolygonRenderer {
 			+ "else"
 			+ "  gl_FragColor = vec4(0.0, z - 1.0, 0.0, 1.0)*0.8;"
 			+ "}";
+
+	//	private final static String polygonTexVertexShader = ""
+	//			+ "precision mediump float;"
+	//			+ "uniform mat4 u_mvp;"
+	//			+ "attribute vec4 a_pos;"
+	//			+ "varying vec2 v_st;"
+	//			+ "void main() {"
+	//			+ "  if(gl_VertexID == 0)"
+	//			+ "    v_st = vec2(0.0,0.0);"
+	//			+ "  else if(gl_VertexID == 1)"
+	//			+ "    v_st = vec2(1.0,0.0);"
+	//			+ "  else if(gl_VertexID == 2)"
+	//			+ "    v_st = vec2(1.0,1.0);"
+	//			+ "  else if(gl_VertexID == 3)"
+	//			+ "    v_st = vec2(0.0,1.0);"
+	//			+ "  gl_Position = u_mvp * a_pos;"
+	//			+ "}";
+	//	private final static String polygonTexFragmentShader = ""
+	//			+ "precision mediump float;"
+	//			+ "uniform vec4 u_color;"
+	//			+ "uniform sampler2D tex;"
+	//			+ "varying vec2 v_st;"
+	//			+ "void main() {"
+	//			+ "  gl_FragColor =  u_color * texture2D(tex, v_st);"
+	//			+ "}";
 }
diff --git a/src/org/oscim/renderer/QuadTree.java b/src/org/oscim/renderer/QuadTree.java
index 7f9ee4e8..a3cf0ca3 100644
--- a/src/org/oscim/renderer/QuadTree.java
+++ b/src/org/oscim/renderer/QuadTree.java
@@ -17,7 +17,7 @@ package org.oscim.renderer;
 import android.util.Log;
 
 public class QuadTree {
-	private static String TAG = "QuadTree";
+	private static String TAG = QuadTree.class.getName();
 
 	// pointer to tile 0/0/0
 	private static QuadTree root;
@@ -45,7 +45,7 @@ public class QuadTree {
 	static boolean remove(MapTile t) {
 		if (t.rel == null) {
 			// Bad Things(tm) happened
-			Log.d(TAG, "already removed " + t);
+			Log.d(TAG, "BUG already removed " + t);
 			return true;
 		}
 
diff --git a/src/org/oscim/renderer/Shaders.java b/src/org/oscim/renderer/Shaders.java
deleted file mode 100644
index bb40cdb0..00000000
--- a/src/org/oscim/renderer/Shaders.java
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright 2012 Hannes Janetzek
- *
- * This program is free software: you can redistribute it and/or modify it under the
- * terms of the GNU Lesser General License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
- * PARTICULAR PURPOSE. See the GNU Lesser General License for more details.
- *
- * You should have received a copy of the GNU Lesser General License along with
- * this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.oscim.renderer;
-
-public final class Shaders {
-
-	// final static String lineVertexZigZagShader = ""
-	// + "precision mediump float;"
-	// + "uniform mat4 mvp;"
-	// + "attribute vec4 a_pos1;"
-	// + "attribute vec2 a_st1;"
-	// + "attribute vec4 a_pos2;"
-	// + "attribute vec2 a_st2;"
-	// + "varying vec2 v_st;"
-	// + "uniform vec2 u_mode;"
-	// + "const float dscale = 1.0/1000.0;"
-	// + "void main() {"
-	// + "if (gl_VertexID & 1 == 0) {"
-	// + "  vec2 dir = dscale * u_mode[1] * a_pos1.zw;"
-	// + "  gl_Position = mvp * vec4(a_pos1.xy + dir, 0.0,1.0);"
-	// + "  v_st = u_mode[1] * a_st1;"
-	// + "} else {"
-	// + "  vec2 dir = dscale * u_mode[1] * a_pos2.zw;"
-	// + "  gl_Position = mvp * vec4( a_pos1.xy, dir, 0.0,1.0);"
-	// + "  v_st = u_mode[1] * vec2(-a_st2.s , a_st2.t);"
-	// + "}";
-
-	// final static String lineVertexShader = ""
-	// + "precision mediump float;"
-	// + "uniform mat4 mvp;"
-	// + "attribute vec4 a_position;"
-	// + "attribute vec2 a_st;"
-	// + "varying vec2 v_st;"
-	// + "uniform float u_width;"
-	// + "const float dscale = 8.0/1000.0;"
-	// + "void main() {"
-	// + "  vec2 dir = dscale * u_width * a_position.zw;"
-	// + "  gl_Position = mvp * vec4(a_position.xy + dir, 0.0,1.0);"
-	// + "  v_st = u_width * a_st;"
-	// + "}";
-	// final static String lineFragmentShader = ""
-	// + "#extension GL_OES_standard_derivatives : enable\n"
-	// + "precision mediump float;"
-	// + "uniform float u_wscale;"
-	// + "uniform float u_width;"
-	// + "uniform int u_mode;"
-	// + "uniform vec4 u_color;"
-	// + "varying vec2 v_st;"
-	// + "void main() {"
-	// + "  gl_FragColor = u_color * 0.5;"
-	// + "}";
-
-	//	final static String buildingVertexShader = ""
-	//			+ "precision mediump float;"
-	//			+ "uniform mat4 u_mvp;"
-	//			+ "uniform vec4 u_color;"
-	//			+ "uniform int u_mode;"
-	//			+ "uniform float u_scale;"
-	//			+ "attribute vec4 a_position;"
-	//			+ "attribute float a_light;"
-	//			+ "varying vec4 color;"
-	//			+ "const float ff = 256.0;"
-	//			+ "const float ffff = 65536.0;"
-	//			+ "void main() {"
-	//			+ "  gl_Position = u_mvp * vec4(a_position.xy, a_position.z/u_scale, 1.0);"
-	//			+ "  if (u_mode == 0)"
-	//			//     roof / depth pass
-	//			+ "    color = u_color;"
-	//			+ "  else if (u_mode == 1)"
-	//			//     sides 1 - use 0xff00
-	//			+ "    color = vec4(u_color.rgb * (a_light / ffff), 0.9);"
-	//			+ "  else"
-	//			//     sides 2 - use 0x00ff
-	//			+ "    color = vec4(u_color.rgb * fract(a_light/ff), 0.9);"
-	//			+ "}";
-
-}
diff --git a/src/org/oscim/renderer/TextureObject.java b/src/org/oscim/renderer/TextureObject.java
index fd5c1919..928ebcd2 100644
--- a/src/org/oscim/renderer/TextureObject.java
+++ b/src/org/oscim/renderer/TextureObject.java
@@ -23,25 +23,32 @@ import android.opengl.GLUtils;
 import android.util.Log;
 
 public class TextureObject {
+	private final static String TAG = TextureObject.class.getName();
+
 	private static TextureObject pool;
+	private static int poolCount;
 
 	private static ArrayList<Bitmap> mBitmaps;
 
-	// shared bitmap and canvas for default texture size
 	public final static int TEXTURE_WIDTH = 256;
 	public final static int TEXTURE_HEIGHT = 256;
 
 	private static int mBitmapFormat;
 	private static int mBitmapType;
-	private static int objectCount = 10;
 
+	/**
+	 * Get a TextureObject with Bitmap to draw to.
+	 * 'uploadTexture()' uploads the Bitmap as texture.
+	 *
+	 * @return obtained TextureObject
+	 */
 	public static synchronized TextureObject get() {
 		TextureObject to;
 
 		if (pool == null) {
-			objectCount += 1;
+			poolCount += 1;
 			if (TextureRenderer.debug)
-				Log.d("...", "textures: " + objectCount);
+				Log.d(TAG, "textures: " + poolCount);
 			pool = new TextureObject(-1);
 		}
 
@@ -54,7 +61,7 @@ public class TextureObject {
 		to.bitmap.eraseColor(Color.TRANSPARENT);
 
 		if (TextureRenderer.debug)
-			Log.d("...", "get texture " + to.id + " " + to.bitmap);
+			Log.d(TAG, "get texture " + to.id + " " + to.bitmap);
 
 		return to;
 	}
@@ -62,7 +69,7 @@ public class TextureObject {
 	public static synchronized void release(TextureObject to) {
 		while (to != null) {
 			if (TextureRenderer.debug)
-				Log.d("...", "release texture " + to.id);
+				Log.d(TAG, "release texture " + to.id);
 
 			TextureObject next = to.next;
 
@@ -78,9 +85,14 @@ public class TextureObject {
 		}
 	}
 
+	/**
+	 * This function may only be used in GLRenderer Thread.
+	 *
+	 * @param to the TextureObjet to compile and upload
+	 */
 	public static synchronized void uploadTexture(TextureObject to) {
 		if (TextureRenderer.debug)
-			Log.d("...", "upload texture " + to.id);
+			Log.d(TAG, "upload texture " + to.id);
 
 		if (to.id < 0) {
 			int[] textureIds = new int[1];
@@ -88,7 +100,7 @@ public class TextureObject {
 			to.id = textureIds[0];
 			initTexture(to.id);
 			if (TextureRenderer.debug)
-				Log.d("...", "new texture " + to.id);
+				Log.d(TAG, "new texture " + to.id);
 		}
 
 		uploadTexture(to, to.bitmap, mBitmapFormat, mBitmapType,
@@ -102,7 +114,7 @@ public class TextureObject {
 			int format, int type, int w, int h) {
 
 		if (to == null) {
-			Log.d("...", "no texture!");
+			Log.d(TAG, "no texture!");
 			return;
 		}
 		GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, to.id);
@@ -130,15 +142,14 @@ public class TextureObject {
 
 	static void init(int num) {
 		pool = null;
-
-		TextureObject to;
+		poolCount = num;
 
 		int[] textureIds = new int[num];
 		GLES20.glGenTextures(num, textureIds, 0);
 
 		for (int i = 1; i < num; i++) {
 			initTexture(textureIds[i]);
-			to = new TextureObject(textureIds[i]);
+			TextureObject to = new TextureObject(textureIds[i]);
 
 			to.next = pool;
 			pool = to;
@@ -147,7 +158,8 @@ public class TextureObject {
 		mBitmaps = new ArrayList<Bitmap>(10);
 
 		for (int i = 0; i < 4; i++) {
-			Bitmap bitmap = Bitmap.createBitmap(TEXTURE_WIDTH, TEXTURE_HEIGHT,
+			Bitmap bitmap = Bitmap.createBitmap(
+					TEXTURE_WIDTH, TEXTURE_HEIGHT,
 					Bitmap.Config.ARGB_8888);
 
 			mBitmaps.add(bitmap);
@@ -160,30 +172,31 @@ public class TextureObject {
 	private static Bitmap getBitmap() {
 		int size = mBitmaps.size();
 		if (size == 0) {
-			for (int i = 0; i < 4; i++) {
-				Bitmap bitmap = Bitmap.createBitmap(TEXTURE_WIDTH, TEXTURE_HEIGHT,
-						Bitmap.Config.ARGB_8888);
+			Bitmap bitmap = Bitmap.createBitmap(
+					TEXTURE_WIDTH, TEXTURE_HEIGHT,
+					Bitmap.Config.ARGB_8888);
 
-				mBitmaps.add(bitmap);
-			}
-			size = 4;
+			return bitmap;
 		}
 		return mBitmaps.remove(size - 1);
 	}
 
+	// -----------------------
 	public TextureObject next;
 
-	public Bitmap bitmap;
-
+	//  texture ID
 	int id;
+
 	int width;
 	int height;
 
 	// vertex offset from which this texture is referenced
-	// or store texture id with vertex?
 	public short offset;
 	public short vertices;
 
+	// temporary Bitmap
+	public Bitmap bitmap;
+
 	TextureObject(int id) {
 		this.id = id;
 	}
diff --git a/src/org/oscim/renderer/layer/VertexPool.java b/src/org/oscim/renderer/layer/VertexPool.java
index c66cfd68..4258f9ca 100644
--- a/src/org/oscim/renderer/layer/VertexPool.java
+++ b/src/org/oscim/renderer/layer/VertexPool.java
@@ -17,7 +17,7 @@ package org.oscim.renderer.layer;
 import android.util.Log;
 
 public class VertexPool {
-	private static final int POOL_LIMIT = 6000;
+	private static final int POOL_LIMIT = 5000;
 
 	static private VertexPoolItem pool = null;
 	static private int count = 0;
@@ -41,7 +41,7 @@ public class VertexPool {
 	public static synchronized VertexPoolItem get() {
 
 		if (pool == null && count > 0) {
-			Log.d("VertexPool", "XXX wrong count: " + count);
+			Log.d("VertexPool", "BUG wrong count: " + count);
 		}
 		if (pool == null) {
 			countAll++;
@@ -56,7 +56,7 @@ public class VertexPool {
 			for (VertexPoolItem tmp = pool; tmp != null; tmp = tmp.next)
 				c++;
 
-			Log.d("VertexPool", "XXX wrong count: " + count + " left" + c);
+			Log.d("VertexPool", "BUG wrong count: " + count + " left" + c);
 			return new VertexPoolItem();
 		}
 
@@ -67,16 +67,10 @@ public class VertexPool {
 		return it;
 	}
 
-	// private static float load = 1.0f;
-	// private static int loadCount = 0;
-
 	public static synchronized void release(VertexPoolItem items) {
 		if (items == null)
 			return;
 
-		// int pall = countAll;
-		// int pcnt = count;
-
 		// limit pool items
 		if (countAll < POOL_LIMIT) {
 
@@ -84,8 +78,6 @@ public class VertexPool {
 
 			while (true) {
 				count++;
-				// load += (float) last.used / VertexPoolItem.SIZE;
-				// loadCount++;
 
 				if (last.next == null)
 					break;
@@ -95,27 +87,17 @@ public class VertexPool {
 
 			last.next = pool;
 			pool = items;
-			// Log.d("Pool", "added: " + (count - pcnt) + " " + count + " " +
-			// countAll
-			// + " load: " + (load / loadCount));
 
 		} else {
-			// int cleared = 0;
 			VertexPoolItem prev, tmp = items;
 			while (tmp != null) {
 				prev = tmp;
 				tmp = tmp.next;
 
 				countAll--;
-
-				// load += (float) prev.used / VertexPoolItem.SIZE;
-				// loadCount++;
-
 				prev.next = null;
 
 			}
-			// Log.d("Pool", "dropped: " + (pall - countAll) + " " + count + " "
-			// + countAll + " load: " + (load / loadCount));
 		}
 	}
 }
diff --git a/src/org/oscim/utils/Point.java b/src/org/oscim/utils/Point.java
index 228e1ce3..5ee846bb 100644
--- a/src/org/oscim/utils/Point.java
+++ b/src/org/oscim/utils/Point.java
@@ -21,11 +21,18 @@ public class Point {
 	public float x;
 	public float y;
 
+	public Point() {
+	}
+
 	Point(float x, float y) {
 		this.x = x;
 		this.y = y;
 	}
 
-	Point() {
+	public void set(float x, float y) {
+		this.x = x;
+		this.y = y;
+
 	}
+
 }
diff --git a/src/org/oscim/view/MapViewPosition.java b/src/org/oscim/view/MapViewPosition.java
index b48557d2..c75ef901 100644
--- a/src/org/oscim/view/MapViewPosition.java
+++ b/src/org/oscim/view/MapViewPosition.java
@@ -43,7 +43,7 @@ import android.util.Log;
 
 public class MapViewPosition {
 
-	private static final String TAG = MapViewPosition.class.getSimpleName();
+	private static final String TAG = MapViewPosition.class.getName();
 
 	public final static int MAX_ZOOMLEVEL = 17;
 	public final static int MIN_ZOOMLEVEL = 2;
@@ -315,7 +315,7 @@ public class MapViewPosition {
 
 		out.x = (int) (mPosX + mu[0] / mScale);
 		out.y = (int) (mPosY + mu[1] / mScale);
-		Log.d(">>>", "getScreenPointOnMap " + reuse);
+		//Log.d(TAG, "getScreenPointOnMap " + reuse);
 
 		return out;
 	}
@@ -340,7 +340,7 @@ public class MapViewPosition {
 				MercatorProjection.pixelYToLatitude(dy, mZoomLevel),
 				MercatorProjection.pixelXToLongitude(dx, mZoomLevel));
 
-		Log.d(">>>", "fromScreenPixels " + p);
+		//Log.d(TAG, "fromScreenPixels " + p);
 
 		return p;
 	}
@@ -550,6 +550,7 @@ public class MapViewPosition {
 	 */
 	public synchronized void rotateMap(float angle, float cx, float cy) {
 		moveMap(cx, cy);
+
 		mRotation += angle;
 
 		updateMatrix();