OpenMapTiles GeoJSON vector tiles #385

vtm-android-example/AndroidManifest.xml

@@ -79,6 +79,9 @@
         <activity
             android:name=".NewGesturesActivity"
             android:configChanges="keyboardHidden|orientation|screenSize" />
+        <activity
+            android:name=".OpenMapTilesGeojsonMapActivity"
+            android:configChanges="keyboardHidden|orientation|screenSize" />
         <activity
             android:name=".PathOverlayActivity"
             android:configChanges="keyboardHidden|orientation|screenSize" />

vtm-android-example/src/org/oscim/android/test/OpenMapTilesGeojsonMapActivity.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2017 devemux86
+ *
+ * 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.android.test;
+
+import android.os.Bundle;
+
+import org.oscim.android.cache.TileCache;
+import org.oscim.layers.TileGridLayer;
+import org.oscim.layers.tile.buildings.BuildingLayer;
+import org.oscim.layers.tile.vector.VectorTileLayer;
+import org.oscim.layers.tile.vector.labeling.LabelLayer;
+import org.oscim.theme.VtmThemes;
+import org.oscim.tiling.source.OkHttpEngine;
+import org.oscim.tiling.source.UrlTileSource;
+import org.oscim.tiling.source.geojson.OpenMapTilesGeojsonTileSource;
+
+public class OpenMapTilesGeojsonMapActivity extends MapActivity {
+
+    private static final boolean USE_CACHE = false;
+
+    private TileCache mCache;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        UrlTileSource tileSource = OpenMapTilesGeojsonTileSource.builder()
+                .apiKey("xxxxxxx") // Put a proper API key
+                .httpFactory(new OkHttpEngine.OkHttpFactory())
+                //.locale("en")
+                .build();
+
+        if (USE_CACHE) {
+            // Cache the tiles into a local SQLite database
+            mCache = new TileCache(this, null, "tile.db");
+            mCache.setCacheSize(512 * (1 << 10));
+            tileSource.setCache(mCache);
+        }
+
+        VectorTileLayer l = mMap.setBaseMap(tileSource);
+        mMap.setTheme(VtmThemes.OPENMAPTILES);
+
+        mMap.layers().add(new BuildingLayer(mMap, l));
+        mMap.layers().add(new LabelLayer(mMap, l));
+
+        mMap.layers().add(new TileGridLayer(mMap, getResources().getDisplayMetrics().density));
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+
+        if (mCache != null)
+            mCache.dispose();
+    }
+}

vtm-android-example/src/org/oscim/android/test/Samples.java

@@ -45,6 +45,7 @@ public class Samples extends Activity {
         linearLayout.addView(createButton(MapsforgeMapActivity.class));
         linearLayout.addView(createButton(MapzenMvtMapActivity.class));
         linearLayout.addView(createButton(MapzenGeojsonMapActivity.class));
+        linearLayout.addView(createButton(OpenMapTilesGeojsonMapActivity.class));
 
         linearLayout.addView(createLabel("Vector Features"));
         linearLayout.addView(createButton(MapsforgeStyleActivity.class));

vtm-json/src/org/oscim/tiling/source/geojson/OpenMapTilesGeojsonTileSource.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2017 devemux86
+ *
+ * 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.tiling.source.geojson;
+
+import org.oscim.core.MapElement;
+import org.oscim.core.Tag;
+import org.oscim.tiling.source.UrlTileSource;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public class OpenMapTilesGeojsonTileSource extends GeojsonTileSource {
+
+    private final static String DEFAULT_URL = "https://free-0.tilehosting.com/data/v3";
+    private final static String DEFAULT_PATH = "/{Z}/{X}/{Y}.geojson";
+
+    public static class Builder<T extends Builder<T>> extends UrlTileSource.Builder<T> {
+        private String locale = "";
+
+        public Builder() {
+            super(DEFAULT_URL, DEFAULT_PATH, 1, 17);
+        }
+
+        public T locale(String locale) {
+            this.locale = locale;
+            return self();
+        }
+
+        public OpenMapTilesGeojsonTileSource build() {
+            return new OpenMapTilesGeojsonTileSource(this);
+        }
+    }
+
+    @SuppressWarnings("rawtypes")
+    public static Builder<?> builder() {
+        return new Builder();
+    }
+
+    private static Map<String, Tag> mappings = new LinkedHashMap<>();
+
+    private static Tag addMapping(String key, String val) {
+        Tag tag = new Tag(key, val);
+        mappings.put(key + "=" + val, tag);
+        return tag;
+    }
+
+    private final String locale;
+
+    public OpenMapTilesGeojsonTileSource(Builder<?> builder) {
+        super(builder);
+        this.locale = builder.locale;
+    }
+
+    public OpenMapTilesGeojsonTileSource() {
+        this(builder());
+    }
+
+    public OpenMapTilesGeojsonTileSource(String urlString) {
+        this(builder().url(urlString));
+    }
+
+    @Override
+    public void decodeTags(MapElement mapElement, Map<String, Object> properties) {
+        boolean hasName = false;
+        String fallbackName = null;
+
+        for (Map.Entry<String, Object> entry : properties.entrySet()) {
+            String key = entry.getKey();
+            Object value = entry.getValue();
+            String val = (value instanceof String) ? (String) value : String.valueOf(value);
+
+            if (key.startsWith(Tag.KEY_NAME)) {
+                int len = key.length();
+                if (len == 4) {
+                    fallbackName = val;
+                    continue;
+                }
+                if (len < 7)
+                    continue;
+                if (locale.equals(key.substring(5))) {
+                    hasName = true;
+                    mapElement.tags.add(new Tag(Tag.KEY_NAME, val, false));
+                }
+                continue;
+            }
+
+            Tag tag = mappings.get(key + "=" + val);
+            if (tag == null)
+                tag = addMapping(key, val);
+            mapElement.tags.add(tag);
+        }
+
+        if (!hasName && fallbackName != null)
+            mapElement.tags.add(new Tag(Tag.KEY_NAME, fallbackName, false));
+    }
+}

vtm-playground/src/org/oscim/test/OpenMapTilesGeojsonTest.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2017 devemux86
+ *
+ * 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.test;
+
+import org.oscim.gdx.GdxMapApp;
+import org.oscim.layers.tile.buildings.BuildingLayer;
+import org.oscim.layers.tile.vector.VectorTileLayer;
+import org.oscim.layers.tile.vector.labeling.LabelLayer;
+import org.oscim.theme.VtmThemes;
+import org.oscim.tiling.source.OkHttpEngine;
+import org.oscim.tiling.source.UrlTileSource;
+import org.oscim.tiling.source.geojson.OpenMapTilesGeojsonTileSource;
+
+import java.io.File;
+import java.util.UUID;
+
+import okhttp3.Cache;
+import okhttp3.OkHttpClient;
+
+public class OpenMapTilesGeojsonTest extends GdxMapApp {
+
+    private static final boolean USE_CACHE = false;
+
+    @Override
+    public void createLayers() {
+        OkHttpClient.Builder builder = new OkHttpClient.Builder();
+        if (USE_CACHE) {
+            // Cache the tiles into file system
+            File cacheDirectory = new File(System.getProperty("java.io.tmpdir"), UUID.randomUUID().toString());
+            int cacheSize = 10 * 1024 * 1024; // 10 MB
+            Cache cache = new Cache(cacheDirectory, cacheSize);
+            builder.cache(cache);
+        }
+        OkHttpEngine.OkHttpFactory factory = new OkHttpEngine.OkHttpFactory(builder);
+
+        UrlTileSource tileSource = OpenMapTilesGeojsonTileSource.builder()
+                .apiKey("xxxxxxx") // Put a proper API key
+                .httpFactory(factory)
+                //.locale("en")
+                .build();
+
+        VectorTileLayer l = mMap.setBaseMap(tileSource);
+        mMap.setTheme(VtmThemes.OPENMAPTILES);
+
+        mMap.layers().add(new BuildingLayer(mMap, l));
+        mMap.layers().add(new LabelLayer(mMap, l));
+    }
+
+    public static void main(String[] args) {
+        GdxMapApp.init();
+        GdxMapApp.run(new OpenMapTilesGeojsonTest());
+    }
+}

vtm-themes/src/org/oscim/theme/VtmThemes.java

@@ -32,6 +32,7 @@ public enum VtmThemes implements ThemeFile {
     DEFAULT("vtm/default.xml"),
     MAPZEN("vtm/mapzen.xml"),
     NEWTRON("vtm/newtron.xml"),
+    OPENMAPTILES("vtm/openmaptiles.xml"),
     OSMAGRAY("vtm/osmagray.xml"),
     OSMARENDER("vtm/osmarender.xml"),
     TRONRENDER("vtm/tronrender.xml");