Map Initial Extent

Demonstrates how to display an ArcGISMap at a specific view point.

How it works

To set an initial Viewpoint:

  1. Create an ArcGISMap.
  2. Create a view point using an Envelope, Viewpoint(Envelope).
  3. Set the starting location of the ArcGIS map, ArcGISMap.setInitialViewpoint(Viewpoint).
  4. Set the ArcGIS map to the MapView.

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.samples.map.map_initial_extent;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;

public class MapInitialExtentSample extends Application {

  private MapView mapView;

  @Override
  public void start(Stage stage) throws Exception {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene scene = new Scene(stackPane);

      // set title, size, and add scene to stage
      stage.setTitle("Map Initial Extent Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // create a ArcGISMap with the basemap
      final ArcGISMap map = new ArcGISMap(Basemap.createTopographic());

      // create an initial extent envelope
      Point leftPoint = new Point(-12211308.778729, 4645116.003309, SpatialReferences.getWebMercator());
      Point rightPoint = new Point(-12208257.879667, 4650542.535773, SpatialReferences.getWebMercator());
      Envelope initialExtent = new Envelope(leftPoint, rightPoint);

      // create a viewpoint from envelope
      Viewpoint viewPoint = new Viewpoint(initialExtent);

      // set initial ArcGISMap extent
      map.setInitialViewpoint(viewPoint);

      // create a view and set ArcGISMap to it
      mapView = new MapView();
      mapView.setMap(map);

      // add the map view to stack pane
      stackPane.getChildren().add(mapView);
    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() throws Exception {

    if (mapView != null) {
      mapView.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }

}


In this topic
  1. How it works
  2. Code