Add WMS layer

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Display a WMS layer using a WMS service URL.

Image of WMS layer URL

Use case

WMS is an OGC standard for displaying maps from images that are dynamically-generated on a web server. WMS is particularly useful for data that changes frequently, contains cartographically complex detail, or requires an open source data standard.

How to use the sample

The map will load automatically when the sample starts.

How it works

  1. Create a WmsLayer specifying the URL of the service and the names of layers you want to display.
    • Note: The name comes from the Name property, not the Title property. On many services, the title is human-readable while the name is a numeric identifier.
  2. Add the layer to the map as an operational layer with map.operationalLayers.add(wmsLayer).

Relevant API

  • ArcGISMap
  • MapView
  • WmsLayer

About the data

This sample uses the WMS service behind the U.S. National Weather Service radar map. Because WMS services generate map images on-the-fly, this layer is always up-to-date with the latest NOAA nowCOAST real-time coastal observations, forecasts, and warnings.

Tags

OGC, web map service, WMS

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.addwmslayer

import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.lifecycleScope
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.Viewpoint
import com.arcgismaps.mapping.layers.WmsLayer
import com.esri.arcgismaps.sample.addwmslayer.databinding.ActivityMainBinding
import com.google.android.material.snackbar.Snackbar
import kotlinx.coroutines.launch

class MainActivity : AppCompatActivity() {

    // set up data binding for the activity
    private val activityMainBinding: ActivityMainBinding by lazy {
        DataBindingUtil.setContentView(this, R.layout.activity_main)
    }

    private val mapView by lazy {
        activityMainBinding.mapView
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // authentication with an API key or named user is
        // required to access basemaps and other location services
        ArcGISEnvironment.apiKey = ApiKey.create(BuildConfig.API_KEY)
        lifecycle.addObserver(mapView)

        // create and add a map with a light gray basemap style
        val map = ArcGISMap(BasemapStyle.ArcGISLightGray)

        // apply mapView assignments
        mapView.apply {
            this.map = map
            // set an initial viewpoint to a zoomed out view of North America
            setViewpoint(Viewpoint(39.8, -98.6, 10e7))
        }

        lifecycleScope.launch {
            // if the map load fails, show an error and return
            map.load().onFailure {
                return@launch showError("Error loading map")
            }
            // create a list representing names of layers to load from the WMS service
            val wmsLayerNames = listOf("conus_base_reflectivity_mosaic")
            // create a new WmsLayer with the WMS service url and the layers name list
            val wmsLayer = WmsLayer(getString(R.string.wms_layer_url), wmsLayerNames)
            // add the wmsLayer to the map as an operational layer
            map.operationalLayers.add(wmsLayer)
            // if loading the layer fails show an error
            wmsLayer.load().onFailure {
                showError("Error loading WmsLayer")
            }
        }
    }

    private fun showError(message: String) {
        Log.e(localClassName, message)
        Snackbar.make(mapView, message, Snackbar.LENGTH_SHORT).show()
    }
}

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