Set initial map location

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Sample viewer app

Display a basemap centered at an initial location and scale.

Image of set initial map location

Use case

You can set a map's initial location when you want to highlight a particular feature or area to establish the context.

How to use the sample

When the map loads, note the specific location and scale of the initial map view.

How it works

  1. Create an ArcGISMap, specifying a basemap type, latitude and longitude in WGS84, and a level of detail.
  2. Display the map in a map view with MapView.setMap(map).

Relevant API

  • BasemapStyle
  • Map
  • MapView

About the data

The map opens with a topographic map of Esri's headquarters in Redlands, California.

Tags

basemap, center, envelope, extent, initial, lat, latitude, level of detail, location, LOD, long, longitude, scale, zoom level

Sample Code

MainActivity.java
                                                                   
/* Copyright 2016 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.setinitialmaplocation;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
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);

    // authentication with an API key or named user is required to access basemaps and other
    // location services
    ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY);

    // create MapView from layout
    mMapView = findViewById(R.id.mapView);
    // create a map with the BasemapType topographic
    ArcGISMap mMap = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
    // set the map to be displayed in this view
    mMapView.setMap(mMap);
    mMapView.setViewpoint(new Viewpoint(34.056295, -117.195800, 10000));
  }

  @Override
  protected void onPause() {
    super.onPause();
    mMapView.pause();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mMapView.resume();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    mMapView.dispose();
  }
}