diff --git a/src/org/oscim/core/MapElement.java b/src/org/oscim/core/MapElement.java
new file mode 100644
index 00000000..7a726120
--- /dev/null
+++ b/src/org/oscim/core/MapElement.java
@@ -0,0 +1,58 @@
+/*
+ * 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 Public 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 Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.core;
+
+/**
+ * MapElement is created by MapDatabase(s) and passed to TileGenerator
+ * via IMapDatabaseCallback.renderElement() TileGenerator processes the
+ * data into MapTile.layers.
+ * -----
+ * This is really just a buffer object that belongs to MapDatabase, so
+ * dont keep a reference to it when passed as parameter.
+ */
+public class MapElement extends GeometryBuffer {
+	public static final int GEOM_NONE = 0;
+	public static final int GEOM_POINT = 1;
+	public static final int GEOM_LINE = 2;
+	public static final int GEOM_POLY = 3;
+
+	// osm layer of the way.
+	public int layer;
+	// osm tags of the way.
+	public Tag[] tags;
+	// GEOM_*
+	public int geometryType;
+
+	// ---- random stuff, to be removed ----
+	// building tags
+	public int height;
+	public int minHeight;
+
+	public int priority;
+
+	public MapElement() {
+		super(4096, 128);
+	}
+
+	public MapElement(int points, int indices) {
+		super(points, indices);
+	}
+
+	public void set(Tag[] tags, int layer, int type) {
+		this.layer = layer;
+		this.tags = tags;
+		this.geometryType = type;
+	}
+}
diff --git a/src/org/oscim/database/IMapDatabaseCallback.java b/src/org/oscim/database/IMapDatabaseCallback.java
index bcbe2d9b..baa46032 100644
--- a/src/org/oscim/database/IMapDatabaseCallback.java
+++ b/src/org/oscim/database/IMapDatabaseCallback.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010, 2011, 2012 mapsforge.org
+ * Copyright 2013 Hannes Janetzek
  *
  * This program is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
@@ -14,77 +14,16 @@
  */
 package org.oscim.database;
 
-import org.oscim.core.GeometryBuffer;
-import org.oscim.core.Tag;
-import org.oscim.database.mapfile.MapDatabase;
+import org.oscim.core.MapElement;
+
 
 /**
- * Callback methods which can be triggered from the {@link MapDatabase}.
+ * MapDatabase callbacks (implemented by  TileGenerator)
  * ____
  * NOTE: All parameters passed belong to the caller! i.e. dont hold
  * references to any arrays after callback function returns.
  */
 public interface IMapDatabaseCallback {
 
-	public class WayData{
-		public WayData(){
-
-		}
-
-		public WayData(GeometryBuffer geom, Tag[] tags) {
-			this.geom = geom;
-			this.tags = tags;
-		}
-
-		public GeometryBuffer geom;
-		// closed == geometry is polygon
-		public boolean closed;
-
-
-		// osm layer of the way.
-		public int layer;
-		// osm tags of the way.
-		public Tag[] tags;
-
-		// building tags
-		public int height;
-		public int minHeight;
-
-		// unused
-		public int priority;
-	}
-
-	/**
-	 * Renders a single point of interest node (POI).
-	 *
-	 * @param layer
-	 *            the layer of the node.
-	 * @param tags
-	 *            the tags of the node.
-	 */
-	void renderPOI(byte layer, Tag[] tags, GeometryBuffer geom);
-
-	/**
-	 * Renders water background for the current tile.
-	 */
-	void renderWaterBackground();
-
-	/**
-	 * Renders a single way or area.
-	 *
-	 */
-	void renderWay(WayData way);
-
-	//	/**
-	//	 * TBD: check if way will be rendered before decoding - MUST be called before renderWay!
-	//	 *
-	//	 * @param tags
-	//	 *            ...
-	//	 * @param closed
-	//	 *            ...
-	//	 * @return true if the way will be rendered (i.e. found match in
-	//	 *         RenderTheme)
-	//	 */
-	//	boolean matchWay(Tag[] tags, boolean closed);
-
+	void renderElement(MapElement element);
 }
diff --git a/src/org/oscim/database/mapfile/MapDatabase.java b/src/org/oscim/database/mapfile/MapDatabase.java
index 5c68517b..a58108e8 100644
--- a/src/org/oscim/database/mapfile/MapDatabase.java
+++ b/src/org/oscim/database/mapfile/MapDatabase.java
@@ -18,12 +18,11 @@ import java.io.File;
 import java.io.IOException;
 import java.io.RandomAccessFile;
 
-import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.Tag;
 import org.oscim.core.Tile;
 import org.oscim.database.IMapDatabase;
 import org.oscim.database.IMapDatabaseCallback;
-import org.oscim.database.IMapDatabaseCallback.WayData;
 import org.oscim.database.MapOptions;
 import org.oscim.database.OpenResult;
 import org.oscim.database.QueryResult;
@@ -198,8 +197,9 @@ public class MapDatabase implements IMapDatabase {
 	private int mTileLongitude;
 	private int[] mIntBuffer;
 
-	private final GeometryBuffer mGeom = new GeometryBuffer(1 << 14, 1 << 8);
-	private final WayData mWay = new WayData();
+	//private final GeometryBuffer mElem = new GeometryBuffer(1 << 14, 1 << 8);
+	//private final WayData mWay = new WayData();
+	private final MapElement mElem = new MapElement();
 
 	private int minLat, minLon;
 	private Tile mTile;
@@ -668,10 +668,18 @@ public class MapDatabase implements IMapDatabase {
 			double sinLat = Math.sin(latitude * PI180);
 			latitude = (int) (Math.log((1.0 + sinLat) / (1.0 - sinLat)) * divy + dy);
 
-			mGeom.points[0] = longitude;
-			mGeom.points[1] = latitude;
-			mGeom.index[0] = 2;
-			mapDatabaseCallback.renderPOI(layer, curTags, mGeom);
+			mElem.clear();
+
+			mElem.startPoints();
+			mElem.addPoint(longitude, latitude);
+
+			mElem.set(curTags, layer, MapElement.GEOM_POINT);
+			mapDatabaseCallback.renderElement(mElem);
+
+//			mGeom.points[0] = longitude;
+//			mGeom.points[1] = latitude;
+//			mGeom.index[0] = 2;
+//			mapDatabaseCallback.renderPOI(layer, curTags, mGeom);
 
 		}
 
@@ -687,11 +695,11 @@ public class MapDatabase implements IMapDatabase {
 		}
 
 		//short[] wayLengths = new short[numBlocks];
-		short[] wayLengths = mGeom.ensureIndexSize(numBlocks, false);
+		short[] wayLengths = mElem.ensureIndexSize(numBlocks, false);
 		if (wayLengths.length > numBlocks)
 			wayLengths[numBlocks] = -1;
 
-		mGeom.pointPos = 0;
+		mElem.pointPos = 0;
 
 		// read the way coordinate blocks
 		for (int coordinateBlock = 0; coordinateBlock < numBlocks; ++coordinateBlock) {
@@ -723,8 +731,8 @@ public class MapDatabase implements IMapDatabase {
 
 		mReadBuffer.readSignedInt(buffer, length);
 
-		float[] outBuffer = mGeom.ensurePointSize(mGeom.pointPos + length, true);
-		int pointPos = mGeom.pointPos;
+		float[] outBuffer = mElem.ensurePointSize(mElem.pointPos + length, true);
+		int pointPos = mElem.pointPos;
 
 		// get the first way node latitude offset (VBE-S)
 		int wayNodeLatitude = mTileLatitude + buffer[0];
@@ -761,7 +769,7 @@ public class MapDatabase implements IMapDatabase {
 			}
 		}
 
-		mGeom.pointPos = pointPos;
+		mElem.pointPos = pointPos;
 
 		return cnt;
 	}
@@ -770,8 +778,8 @@ public class MapDatabase implements IMapDatabase {
 		int[] buffer = mIntBuffer;
 		mReadBuffer.readSignedInt(buffer, length);
 
-		float[] outBuffer = mGeom.ensurePointSize(mGeom.pointPos + length, true);
-		int pointPos = mGeom.pointPos;
+		float[] outBuffer = mElem.ensurePointSize(mElem.pointPos + length, true);
+		int pointPos = mElem.pointPos;
 
 		// get the first way node latitude single-delta offset (VBE-S)
 		int wayNodeLatitude = mTileLatitude + buffer[0];
@@ -803,7 +811,7 @@ public class MapDatabase implements IMapDatabase {
 			}
 		}
 
-		mGeom.pointPos = pointPos;
+		mElem.pointPos = pointPos;
 		return cnt;
 	}
 
@@ -974,18 +982,18 @@ public class MapDatabase implements IMapDatabase {
 					return false;
 
 				// wayDataContainer.textPos = textPos;
-				int l = mGeom.index[0];
+				int l = mElem.index[0];
 
-				boolean closed = mGeom.points[0] == mGeom.points[l - 2]
-						&& mGeom.points[1] == mGeom.points[l - 1];
+				boolean closed = mElem.points[0] == mElem.points[l - 2]
+						&& mElem.points[1] == mElem.points[l - 1];
 
-				projectToTile(mGeom.points, mGeom.index);
-				mWay.geom = mGeom;
-				mWay.layer = layer;
-				mWay.closed = closed;
-				mWay.tags = curTags;
+				projectToTile(mElem.points, mElem.index);
+				mElem.layer = layer;
 
-				mapDatabaseCallback.renderWay(mWay);
+				mElem.geometryType = closed ? MapElement.GEOM_POLY : MapElement.GEOM_LINE;
+				mElem.tags = curTags;
+
+				mapDatabaseCallback.renderElement(mElem);
 			}
 		}
 
diff --git a/src/org/oscim/database/oscimap/MapDatabase.java b/src/org/oscim/database/oscimap/MapDatabase.java
index c48d5937..473721c2 100644
--- a/src/org/oscim/database/oscimap/MapDatabase.java
+++ b/src/org/oscim/database/oscimap/MapDatabase.java
@@ -23,12 +23,11 @@ import java.util.Arrays;
 
 import org.oscim.core.BoundingBox;
 import org.oscim.core.GeoPoint;
-import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.Tag;
 import org.oscim.core.Tile;
 import org.oscim.database.IMapDatabase;
 import org.oscim.database.IMapDatabaseCallback;
-import org.oscim.database.IMapDatabaseCallback.WayData;
 import org.oscim.database.MapInfo;
 import org.oscim.database.MapOptions;
 import org.oscim.database.OpenResult;
@@ -75,7 +74,8 @@ public class MapDatabase implements IMapDatabase {
 	private final boolean debug = false;
 	private LwHttp lwHttp;
 
-	private final WayData mWay = new WayData();
+	//private final WayData mWay = new WayData();
+	private final MapElement mElem = new MapElement();
 
 	@Override
 	public QueryResult executeQuery(JobTile tile, IMapDatabaseCallback mapDatabaseCallback) {
@@ -211,7 +211,7 @@ public class MapDatabase implements IMapDatabase {
 	}
 
 	// /////////////// hand sewed tile protocol buffers decoder ///////////////
-	private final int MAX_WAY_COORDS = 1 << 14;
+	//private final int MAX_WAY_COORDS = 1 << 14;
 
 	// overall bytes of content processed
 	private int mBytesProcessed;
@@ -240,7 +240,7 @@ public class MapDatabase implements IMapDatabase {
 
 	//private float[] mTmpCoords;
 	//private short[] mIndices = new short[10];
-	private final GeometryBuffer mGeom = new GeometryBuffer(MAX_WAY_COORDS, 128);
+	//private final GeometryBuffer mElem = new GeometryBuffer(MAX_WAY_COORDS, 128);
 
 	private Tag[][] mElementTags;
 
@@ -315,9 +315,9 @@ public class MapDatabase implements IMapDatabase {
 	}
 
 	private int decodeWayIndices(int indexCnt) throws IOException {
-		mGeom.index = decodeShortArray(indexCnt, mGeom.index);
+		mElem.index = decodeShortArray(indexCnt, mElem.index);
 
-		short[] index = mGeom.index;
+		short[] index = mElem.index;
 		int coordCnt = 0;
 
 		for (int i = 0; i < indexCnt; i++) {
@@ -348,13 +348,13 @@ public class MapDatabase implements IMapDatabase {
 		int coordCnt = 0;
 		if (type == TAG_TILE_POINT){
 			coordCnt = 2;
-			mGeom.index[0] = 2;
+			mElem.index[0] = 2;
 		}
 
-		mWay.layer = 5;
-		mWay.priority = 0;
-		mWay.height = 0;
-		mWay.minHeight = 0;
+		mElem.layer = 5;
+		mElem.priority = 0;
+		mElem.height = 0;
+		mElem.minHeight = 0;
 
 		while (mBytesProcessed < end) {
 			// read tag and wire type
@@ -391,19 +391,19 @@ public class MapDatabase implements IMapDatabase {
 					break;
 
 				case TAG_ELEM_LAYER:
-					mWay.layer = decodeVarint32();
+					mElem.layer = decodeVarint32();
 					break;
 
 				case TAG_ELEM_HEIGHT:
-					mWay.height= decodeVarint32();
+					mElem.height= decodeVarint32();
 					break;
 
 				case TAG_ELEM_MIN_HEIGHT:
-					mWay.minHeight = decodeVarint32();
+					mElem.minHeight = decodeVarint32();
 					break;
 
 				case TAG_ELEM_PRIORITY:
-					mWay.priority = decodeVarint32();
+					mElem.priority = decodeVarint32();
 					break;
 
 				default:
@@ -419,23 +419,22 @@ public class MapDatabase implements IMapDatabase {
 			return false;
 		}
 
-		mWay.geom = mGeom;
-		mWay.tags = tags;
+		mElem.tags = tags;
 
 		switch (type) {
 			case TAG_TILE_LINE:
-				mWay.closed = false;
-				mMapGenerator.renderWay(mWay);
+				mElem.geometryType= MapElement.GEOM_LINE;
 				break;
 			case TAG_TILE_POLY:
-				mWay.closed = true;
-				mMapGenerator.renderWay(mWay);
+				mElem.geometryType= MapElement.GEOM_POLY;
 				break;
 			case TAG_TILE_POINT:
-				mMapGenerator.renderPOI((byte) mWay.layer, tags, mGeom);
+				mElem.geometryType= MapElement.GEOM_POINT;
 				break;
 		}
 
+		mMapGenerator.renderElement(mElem);
+
 		return true;
 	}
 
@@ -506,7 +505,7 @@ public class MapDatabase implements IMapDatabase {
 
 		float scale = mScaleFactor;
 
-		float[] coords = mGeom.ensurePointSize(nodes, false);
+		float[] coords = mElem.ensurePointSize(nodes, false);
 
 		//		if (nodes * 2 > coords.length) {
 		//			Log.d(TAG, mTile + " increase way coord buffer to " + (nodes * 2));
diff --git a/src/org/oscim/database/pbmap/MapDatabase.java b/src/org/oscim/database/pbmap/MapDatabase.java
index 69cd928c..b9278a33 100644
--- a/src/org/oscim/database/pbmap/MapDatabase.java
+++ b/src/org/oscim/database/pbmap/MapDatabase.java
@@ -37,11 +37,11 @@ import java.util.Map;
 import org.oscim.core.BoundingBox;
 import org.oscim.core.GeoPoint;
 import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.Tag;
 import org.oscim.core.Tile;
 import org.oscim.database.IMapDatabase;
 import org.oscim.database.IMapDatabaseCallback;
-import org.oscim.database.IMapDatabaseCallback.WayData;
 import org.oscim.database.MapInfo;
 import org.oscim.database.MapOptions;
 import org.oscim.database.OpenResult;
@@ -103,7 +103,7 @@ public class MapDatabase implements IMapDatabase {
 
 	private static final int MAX_TAGS_CACHE = 100;
 
-	private final WayData mWay = new WayData();
+	private final MapElement mElement = new MapElement();
 
 	private static Map<String, Tag> tagHash = Collections
 			.synchronizedMap(new LinkedHashMap<String, Tag>(
@@ -454,12 +454,13 @@ public class MapDatabase implements IMapDatabase {
 		if (layer == 0)
 			layer = 5;
 
-		mWay.geom = mGeom;
-		mWay.tags = tags;
-		mWay.layer = layer;
-		mWay.closed = polygon;
+		mElement.set(tags, layer, polygon ? MapElement.GEOM_POLY : MapElement.GEOM_LINE);
 
-		mMapGenerator.renderWay(mWay);
+//		mElement.tags = tags;
+//		mElement.layer = layer;
+//		mElement.closed = polygon;
+
+		mMapGenerator.renderElement(mElement);
 		return true;
 	}
 
@@ -535,8 +536,12 @@ public class MapDatabase implements IMapDatabase {
 			coords[cnt++] = Tile.SIZE - lastY / scale;
 		}
 
-		mGeom.index[0] = (short)numNodes;
-		mMapGenerator.renderPOI(layer, tags, mGeom);
+
+		mElement.index[0] = (short)numNodes;
+		mElement.set(tags, layer, MapElement.GEOM_POINT);
+		mMapGenerator.renderElement(mElement);
+
+		//mMapGenerator.renderPOI(layer, tags, mGeom);
 
 		return cnt;
 	}
diff --git a/src/org/oscim/database/test/MapDatabase.java b/src/org/oscim/database/test/MapDatabase.java
index 4bd12412..93fbb14c 100644
--- a/src/org/oscim/database/test/MapDatabase.java
+++ b/src/org/oscim/database/test/MapDatabase.java
@@ -14,19 +14,21 @@
  */
 package org.oscim.database.test;
 
+import static org.oscim.core.MapElement.GEOM_LINE;
+import static org.oscim.core.MapElement.GEOM_POINT;
+import static org.oscim.core.MapElement.GEOM_POLY;
+
 import org.oscim.core.BoundingBox;
-import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.Tag;
 import org.oscim.core.Tile;
 import org.oscim.database.IMapDatabase;
 import org.oscim.database.IMapDatabaseCallback;
-import org.oscim.database.IMapDatabaseCallback.WayData;
 import org.oscim.database.MapInfo;
 import org.oscim.database.MapOptions;
 import org.oscim.database.OpenResult;
 import org.oscim.database.QueryResult;
 import org.oscim.generator.JobTile;
-
 /**
  *
  *
@@ -56,13 +58,10 @@ public class MapDatabase implements IMapDatabase {
 
 	private boolean mOpenFile = false;
 
-	private final WayData mWay;
-	private final GeometryBuffer mGeom;
+	private final MapElement mElem;
 
 	public MapDatabase() {
-		mGeom = new GeometryBuffer(1, 1);
-		mWay = new WayData();
-		mWay.geom = mGeom;
+		mElem = new MapElement();
 	}
 
 	@Override
@@ -70,100 +69,91 @@ public class MapDatabase implements IMapDatabase {
 			IMapDatabaseCallback mapDatabaseCallback) {
 
 		int size = Tile.SIZE;
-		GeometryBuffer g = mGeom;
+		MapElement e = mElem;
 
 		float x1 = -1;
 		float y1 = -1;
 		float x2 = size + 1;
 		float y2 = size + 1;
-		g.clear();
-		g.startPolygon();
-		g.addPoint(x1, y1);
-		g.addPoint(x2, y1);
-		g.addPoint(x2, y2);
-		g.addPoint(x1, y2);
+		e.clear();
+		e.startPolygon();
+		e.addPoint(x1, y1);
+		e.addPoint(x2, y1);
+		e.addPoint(x2, y2);
+		e.addPoint(x1, y2);
 
 		y1 = 40;
 		y2 = size - 40;
 		x1 = 40;
 		x2 = size - 40;
 
-		g.startHole();
-		g.addPoint(x1, y1);
-		g.addPoint(x2, y1);
-		g.addPoint(x2, y2);
-		g.addPoint(x1, y2);
+		e.startHole();
+		e.addPoint(x1, y1);
+		e.addPoint(x2, y1);
+		e.addPoint(x2, y2);
+		e.addPoint(x1, y2);
 
-		mWay.tags = mTags;
-		mWay.layer = 0;
-		mWay.closed = true;
+		e.set(mTags, 0, GEOM_POLY);
+		mapDatabaseCallback.renderElement(e);
 
-		mapDatabaseCallback.renderWay(mWay);
-
-		g.clear();
+		e.clear();
 
 		// middle horizontal
-		g.startLine();
-		g.addPoint(0, size / 2);
-		g.addPoint(size, size / 2);
+		e.startLine();
+		e.addPoint(0, size / 2);
+		e.addPoint(size, size / 2);
 
 		// center up
-		g.startLine();
-		g.addPoint(size / 2, -size / 2);
-		g.addPoint(size / 2, size / 2);
+		e.startLine();
+		e.addPoint(size / 2, -size / 2);
+		e.addPoint(size / 2, size / 2);
 
 		// center down
-		g.startLine();
-		g.addPoint(size / 2, size / 2);
-		g.addPoint(size / 2, size / 2 + size);
+		e.startLine();
+		e.addPoint(size / 2, size / 2);
+		e.addPoint(size / 2, size / 2 + size);
 
-		mWay.closed = false;
-		mWay.layer = 0;
-		mWay.tags = mTagsWay;
-		mapDatabaseCallback.renderWay(mWay);
+		e.set(mTagsWay, 0, GEOM_LINE);
+		mapDatabaseCallback.renderElement(e);
 
-		g.clear();
+		e.clear();
 
 		// left-top to center
-		g.startLine();
-		g.addPoint(size / 2, size / 2);
-		g.addPoint(10, 10);
+		e.startLine();
+		e.addPoint(size / 2, size / 2);
+		e.addPoint(10, 10);
 
-		g.startLine();
-		g.addPoint(0, 10);
-		g.addPoint(size, 10);
+		e.startLine();
+		e.addPoint(0, 10);
+		e.addPoint(size, 10);
 
-		g.startLine();
-		g.addPoint(10, 0);
-		g.addPoint(10, size);
+		e.startLine();
+		e.addPoint(10, 0);
+		e.addPoint(10, size);
 
-		mWay.closed = false;
-		mWay.layer = 1;
-		mWay.tags = mTagsWay;
-		mapDatabaseCallback.renderWay(mWay);
+		e.set(mTagsWay, 1, GEOM_LINE);
+		mapDatabaseCallback.renderElement(e);
 
-		g.clear();
-		g.startPolygon();
+		e.clear();
+		e.startPolygon();
 		float r = size / 2;
 
 		for (int i = 0; i < 360; i += 4) {
 			double d = Math.toRadians(i);
-			g.addPoint(r + (float) Math.cos(d) * (r - 40), r + (float) Math.sin(d) * (r - 40));
+			e.addPoint(r + (float) Math.cos(d) * (r - 40), r + (float) Math.sin(d) * (r - 40));
 		}
 
-		mWay.closed = true;
-		mWay.layer = 1;
-		mWay.tags = mTagsBoundary;
-		mapDatabaseCallback.renderWay(mWay);
+		e.set(mTagsBoundary, 1, GEOM_LINE);
+		mapDatabaseCallback.renderElement(e);
 
 
+		e.clear();
+		e.startPoints();
+		e.addPoint(size/2, size/2);
 
-		g.clear();
-		g.startPoints();
-		g.addPoint(size/2, size/2);
 		mTagsPlace[1] = new Tag("name", tile.toString());
-
-		mapDatabaseCallback.renderPOI((byte)0, mTagsPlace, g);
+		e.set(mTagsPlace, 0, GEOM_POINT);
+		mapDatabaseCallback.renderElement(e);
 
 		return QueryResult.SUCCESS;
 	}
diff --git a/src/org/oscim/generator/TileGenerator.java b/src/org/oscim/generator/TileGenerator.java
index ac04bbd3..3b23c4a9 100644
--- a/src/org/oscim/generator/TileGenerator.java
+++ b/src/org/oscim/generator/TileGenerator.java
@@ -13,12 +13,14 @@
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package org.oscim.generator;
-
+import static org.oscim.core.MapElement.GEOM_LINE;
+import static org.oscim.core.MapElement.GEOM_POINT;
+import static org.oscim.core.MapElement.GEOM_POLY;
 import static org.oscim.generator.JobTile.STATE_NONE;
 
 import java.util.Arrays;
 
-import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.MercatorProjection;
 import org.oscim.core.Tag;
 import org.oscim.core.Tile;
@@ -66,22 +68,10 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	public static final byte STROKE_MIN_ZOOM_LEVEL = 12;
 	public static final byte STROKE_MAX_ZOOM_LEVEL = 17;
 
-	//private static final Tag[] debugTagBox = ;
 	private static final Tag[] debugTagWay = { new Tag("debug", "way") };
 	private static final Tag[] debugTagArea = { new Tag("debug", "area") };
 
-	private final GeometryBuffer mDebugPoint = new GeometryBuffer(
-			new float[] { Tile.SIZE >> 1, 10 },
-			new short[] { 2 });
-
-	private final WayData mDebugWay = new WayData(
-			new GeometryBuffer(
-					new float[] { 0, 0, 0, Tile.SIZE,
-							Tile.SIZE, Tile.SIZE,
-							Tile.SIZE, 0, 0, 0 },
-					new short[] { 10 }),
-			new Tag[] { new Tag("debug", "box") }
-			);
+	private final MapElement mDebugWay, mDebugPoint;
 
 	private static RenderTheme renderTheme;
 	private static int renderLevels;
@@ -93,10 +83,8 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	// currently processed tile
 	private MapTile mTile;
 
-	// currently processed geometry
-	private GeometryBuffer mGeom;
-
-	private WayData mWay;
+	// currently processed MapElement
+	private MapElement mElement;
 
 	// current line layer, will be added to outline layers
 	private LineLayer mCurLineLayer;
@@ -108,6 +96,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	private float mGroundResolution;
 
 	// replacement for variable value tags that should not be matched by RenderTheme
+	// FIXME make this general, maybe subclass tags
 	private final static Tag mTagEmptyName = new Tag(Tag.TAG_KEY_NAME, null, false);
 	private final static Tag mTagEmptyHouseNr = new Tag(Tag.TAG_KEY_HOUSE_NUMBER, null, false);
 	private Tag mTagName;
@@ -128,6 +117,22 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	 */
 	public TileGenerator() {
 		mClipper = new LineClipper(0, 0, Tile.SIZE, Tile.SIZE, true);
+
+		 MapElement m = mDebugWay = new MapElement();
+		 m.startLine();
+		 int s = Tile.SIZE;
+		 m.addPoint(0, 0);
+		 m.addPoint(0, s);
+		 m.addPoint(s, s);
+		 m.addPoint(s, 0);
+		 m.addPoint(0, 0);
+		 m.tags = new Tag[] { new Tag("debug", "box") };
+		 m.geometryType = GEOM_LINE;
+
+		 m  = mDebugPoint= new MapElement();
+		 m.startPoints();
+		 m.addPoint(s >> 1, 10);
+		 m.geometryType = GEOM_POINT;
 	}
 
 	public void cleanup() {
@@ -178,13 +183,13 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 		if (debug.drawTileFrames) {
 			// draw tile coordinate
 			mTagName = new Tag("name", mTile.toString(), false);
-			mGeom = mDebugPoint;
+			mElement = mDebugPoint;
 			RenderInstruction[] ri;
 			ri = renderTheme.matchNode(debugTagWay, (byte) 0);
 			renderNode(ri);
 
 			// draw tile box
-			mWay = mDebugWay;
+			mElement = mDebugWay;
 			mDrawingLayer = 100 * renderLevels;
 			ri = renderTheme.matchWay(mDebugWay.tags, (byte) 0, false);
 			renderWay(ri);
@@ -263,48 +268,47 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	}
 
 	// ---------------- MapDatabaseCallback -----------------
-
 	@Override
-	public void renderPOI(byte layer, Tag[] tags, GeometryBuffer geom) {
+	public void renderElement(MapElement element) {
 		clearState();
 
-		// remove tags that should not be cached in Rendertheme
-		filterTags(tags);
+		mElement = element;
 
-		// get render instructions
-		RenderInstruction[] ri = renderTheme.matchNode(tags, mTile.zoomLevel);
+		if (element.geometryType == GEOM_POINT) {
+			// remove tags that should not be cached in Rendertheme
+			filterTags(element.tags);
 
-		if (ri == null)
-			return;
+			// get render instructions
+			RenderInstruction[] ri = renderTheme.matchNode(element.tags, mTile.zoomLevel);
 
-		mGeom = geom;
-		renderNode(ri);
+			if (ri != null)
+				renderNode(ri);
+		}
+		else {
+
+			// replace tags that should not be cached in Rendertheme (e.g. name)
+			if (!filterTags(element.tags))
+				return;
+
+			boolean closed = element.geometryType == GEOM_POLY;
+
+			mDrawingLayer = getValidLayer(element.layer) * renderLevels;
+
+			// get render instructions
+			RenderInstruction[] ri = renderTheme.matchWay(element.tags,
+					(byte) (mTile.zoomLevel + 0), closed);
+
+			renderWay(ri);
+
+			if (debug.debugTheme && ri == null)
+				debugUnmatched(closed, element.tags);
+
+			mCurLineLayer = null;
+		}
+
+		mElement = null;
 	}
 
-	@Override
-	public void renderWay(WayData way) {
-		mWay = way;
-
-		clearState();
-
-		// replace tags that should not be cached in Rendertheme (e.g. name)
-		if (!filterTags(way.tags))
-			return;
-
-		mDrawingLayer = getValidLayer(way.layer) * renderLevels;
-
-		// get render instructions
-		RenderInstruction[] ri = renderTheme.matchWay(way.tags,
-				(byte) (mTile.zoomLevel + 0), way.closed);
-
-		renderWay(ri);
-
-		if (debug.debugTheme && ri == null)
-			debugUnmatched(way.closed, way.tags);
-
-		mCurLineLayer = null;
-		mWay = null;
-	}
 
 	private void debugUnmatched(boolean closed, Tag[] tags) {
 		Log.d(TAG, "DBG way not matched: " + closed + " "
@@ -342,9 +346,9 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 		mCurLineLayer = null;
 	}
 
-	@Override
-	public void renderWaterBackground() {
-	}
+	//	@Override
+	//	public void renderWaterBackground() {
+	//	}
 
 	// ----------------- RenderThemeCallback -----------------
 	@Override
@@ -378,7 +382,8 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 				return;
 			}
 
-			lineLayer.addLine(mWay.geom.points, mWay.geom.index, mWay.closed);
+			lineLayer.addLine(mElement.points, mElement.index,
+					mElement.geometryType == GEOM_POLY);
 
 			// keep reference for outline layer
 			mCurLineLayer = lineLayer;
@@ -400,7 +405,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 				lineLayer.width = w;
 			}
 
-			lineLayer.addLine(mWay.geom.points, mWay.geom.index);
+			lineLayer.addLine(mElement.points, mElement.index);
 		}
 	}
 
@@ -413,7 +418,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 			if (mTile.layers.extrusionLayers == null)
 				mTile.layers.extrusionLayers = new ExtrusionLayer(0, mGroundResolution);
 
-			((ExtrusionLayer) mTile.layers.extrusionLayers).addBuildings(mWay);
+			((ExtrusionLayer) mTile.layers.extrusionLayers).addBuildings(mElement);
 
 			return;
 		}
@@ -429,7 +434,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 		if (layer.area == null)
 			layer.area = area;
 
-		layer.addPolygon(mWay.geom.points, mWay.geom.index);
+		layer.addPolygon(mElement.points, mElement.index);
 	}
 
 	private String textValueForKey(Text text) {
@@ -453,8 +458,8 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 		if (value == null)
 			return;
 
-		float x = mWay.geom.points[0];
-		float y = mWay.geom.points[1];
+		float x = mElement.points[0];
+		float y = mElement.points[1];
 
 		mTile.addLabel(TextItem.pool.get().set(x, y, value, text));
 	}
@@ -465,9 +470,9 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 		if (value == null)
 			return;
 
-		for (int i = 0, n = mGeom.index[0]; i < n; i += 2) {
-			float x = mGeom.points[i];
-			float y = mGeom.points[i + 1];
+		for (int i = 0, n = mElement.index[0]; i < n; i += 2) {
+			float x = mElement.points[i];
+			float y = mElement.points[i + 1];
 			mTile.addLabel(TextItem.pool.get().set(x, y, value, text));
 		}
 	}
@@ -479,12 +484,12 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 			return;
 
 		int offset = 0;
-		for (int i = 0, n = mWay.geom.index.length; i < n; i++) {
-			int length = mWay.geom.index[i];
+		for (int i = 0, n = mElement.index.length; i < n; i++) {
+			int length = mElement.index[i];
 			if (length < 4)
 				break;
 
-			WayDecorator.renderText(mClipper, mWay.geom.points, value, text,
+			WayDecorator.renderText(mClipper, mElement.points, value, text,
 					offset, length, mTile);
 			offset += length;
 		}
diff --git a/src/org/oscim/renderer/layer/ExtrusionLayer.java b/src/org/oscim/renderer/layer/ExtrusionLayer.java
index e77ec445..6232dd63 100644
--- a/src/org/oscim/renderer/layer/ExtrusionLayer.java
+++ b/src/org/oscim/renderer/layer/ExtrusionLayer.java
@@ -19,8 +19,8 @@ import java.nio.ByteOrder;
 import java.nio.ShortBuffer;
 
 import org.oscim.core.GeometryBuffer;
+import org.oscim.core.MapElement;
 import org.oscim.core.Tile;
-import org.oscim.database.IMapDatabaseCallback.WayData;
 import org.oscim.renderer.BufferObject;
 import org.oscim.renderer.GLRenderer;
 import org.oscim.utils.LineClipper;
@@ -76,13 +76,13 @@ public class ExtrusionLayer extends Layer {
 		mClipper = new LineClipper(0, 0, Tile.SIZE, Tile.SIZE);
 	}
 
-	public void addBuildings(WayData way) {
+	public void addBuildings(MapElement element) {
 
-		short[] index = way.geom.index;
-		float[] points = way.geom.points;
+		short[] index = element.index;
+		float[] points = element.points;
 
-		float height = way.height;
-		float minHeight = way.minHeight;
+		float height = element.height;
+		float minHeight = element.minHeight;
 
 		// 12m default
 		if (height == 0)
@@ -123,7 +123,7 @@ public class ExtrusionLayer extends Layer {
 			// start next polygon
 			if (length == 0) {
 				if (complexOutline)
-					addRoof(startVertex, way.geom, geomIndexPos, geomPointPos);
+					addRoof(startVertex, element, geomIndexPos, geomPointPos);
 
 				startVertex = mNumVertices;
 				simpleOutline = true;
@@ -163,7 +163,7 @@ public class ExtrusionLayer extends Layer {
 			}
 		}
 		if (complexOutline)
-			addRoof(startVertex, way.geom, geomIndexPos, geomPointPos);
+			addRoof(startVertex, element, geomIndexPos, geomPointPos);
 	}
 
 	private void addRoofSimple(int startVertex, int len) {