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 using WebTiledLayer.create(urlTemplate, subDomains).
Set the attribution property on the web tiled layer. Note: this is a necessary step because web tiled services don't have associated service metadata.
Create a new Basemap from the layer and apply it to the mapView for display.
Relevant API
Basemap
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 ArcGIS Maps SDK 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:
layer, OGC, Open Street Map, OpenStreetMap, stamen.com, tiled, tiles
Sample Code
MainActivity.kt
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/* Copyright 2023 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.arcgismaps.sample.addwebtiledlayer
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.Basemap
import com.arcgismaps.mapping.layers.WebTiledLayer
import com.esri.arcgismaps.sample.addwebtiledlayer.databinding.ActivityMainBinding
classMainActivity : AppCompatActivity() {
// set up data binding for the activityprivateval activityMainBinding: ActivityMainBinding by lazy {
DataBindingUtil.setContentView(this, R.layout.activity_main)
}
privateval mapView by lazy {
activityMainBinding.mapView
}
overridefunonCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
lifecycle.addObserver(mapView)
// list of sub-domainsval subDomains = listOf("a", "b", "c", "d")
// build the web tiled layer from stamen url and subDomainsval webTiledLayer =
WebTiledLayer.create(
getString(R.string.template_uri_stamen),
subDomains
).apply {
// set the attribution on the layer attribution = getString(R.string.stamen_attribution)
}
// use web tiled layer as Basemapval map = ArcGISMap(Basemap(webTiledLayer))
mapView.map = map
}
}
