Display a tiled web layer.
Use case
Tiled map services are a set of pre-generated images (e.g. "tiles") arranged in folders for each row, column, and zoom level. As you navigate the map, map tiles are requested for the current extent. ArcGISTiledLayer
and WmtsLayer
are types of tiled map services used for specific data types. WebTiledLayer
is useful for displaying other data sources that contain tiles arranged in a row/column/level directory structure, such as OpenStreetMap.
How to use the sample
Run the sample and a map will appear. As you navigate the map, map tiles will be fetched automatically and displayed on the map.
How it works
- Create a
WebTiledLayer
from a URL and a list of subdomains. - Create a new
Basemap
from the layer. - Update the attribution on the layer with
webTiledLayer.setAttribution(attributionString)
. Note: this is a necessary step because web tiled services don't have associated service metadata.
Relevant API
- BasemapStyle
- WebTiledLayer
About the data
The basemap in this sample is provided by Stamen Design. Stamen publishes tiled services based on OpenStreetMap data with several unique styles applied.
Additional information
Web tiled services use a uniform addressing scheme with pre-rendered tiles. Image tiles are accessed via a URL template string, with parameters for subdomain, level, column, and row.
- Subdomain is optional and allows Runtime to balance requests among multiple servers for enhanced performance.
- Level, row, and column select the tiles to load based on the visible extent of the map.
For more information about web tiled layers, see the following resources:
Tags
layer, OGC, Open Street Map, OpenStreetMap, stamen.com, tiled, tiles
Sample Code
/* Copyright 2017 Esri
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.esri.arcgisruntime.sample.webtiledlayer;
import java.util.Arrays;
import java.util.List;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.layers.WebTiledLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.MapView;
public class MainActivity extends AppCompatActivity {
private MapView mMapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get reference to map view
mMapView = findViewById(R.id.mapView);
// list of sub-domains
List<String> subDomains = Arrays.asList("a", "b", "c", "d");
// build the web tiled layer from stamen
WebTiledLayer webTiledLayer = new WebTiledLayer(getString(R.string.template_uri_stamen), subDomains);
// use web tiled layer as Basemap
ArcGISMap map = new ArcGISMap(new Basemap(webTiledLayer));
mMapView.setMap(map);
// custom attributes
webTiledLayer.setAttribution(getString(R.string.stamen_attribution));
}
@Override
protected void onPause() {
mMapView.pause();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
mMapView.resume();
}
@Override
protected void onDestroy() {
mMapView.dispose();
super.onDestroy();
}
}