natural earth image layer

src/org/oscim/layers/tile/bitmap/NaturalEarth.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2010, 2011, 2012 mapsforge.org
+ *
+ * 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.layers.tile.bitmap;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.oscim.core.Tile;
+
+public class NaturalEarth extends AbstractTileSource {
+	public static final NaturalEarth INSTANCE = new NaturalEarth("city.informatik.uni-bremen.de", 80);
+	private static final int PARALLEL_REQUESTS_LIMIT = 4;
+	private static final String PROTOCOL = "http";
+	private static final int ZOOM_LEVEL_MAX = 6;
+	private static final int ZOOM_LEVEL_MIN = 0;
+
+	public NaturalEarth(String hostName, int port) {
+		super(hostName, port);
+	}
+
+	@Override
+	public int getParallelRequestsLimit() {
+		return PARALLEL_REQUESTS_LIMIT;
+	}
+
+	@Override
+	public URL getTileUrl(Tile tile) throws MalformedURLException {
+		StringBuilder stringBuilder = new StringBuilder(32);
+		stringBuilder.append("/osci/ne_image2/");
+		stringBuilder.append(tile.zoomLevel);
+		stringBuilder.append('/');
+		stringBuilder.append(tile.tileX);
+		stringBuilder.append('/');
+		stringBuilder.append((1 << tile.zoomLevel) - tile.tileY - 1);
+		stringBuilder.append(".png");
+
+		return new URL(PROTOCOL, this.hostName, this.port, stringBuilder.toString());
+	}
+
+	@Override
+	public byte getZoomLevelMax() {
+		return ZOOM_LEVEL_MAX;
+	}
+
+	@Override
+	public byte getZoomLevelMin() {
+		return ZOOM_LEVEL_MIN;
+	}
+}