Service Area Task

Demonstrates how to find services areas around a point using the ServiceAreaTask. A service area shows locations that can be reached from a facility based off a certain impedance [such as travel time]. Barriers can also be added which can effect the impedance by not letting traffic through or adding the time is takes to pass that barrier.

How it works

To display service areas around a certain location:

  1. Create a ServiceAreaTask from an online service.
  2. Get ServiceAreaParameters from task, task.createDefaultParametersAsync().
  3. Setting return polygons to true will return all services areas, serviceAreaParameters.setReturnPolygons(true).
  4. Add a ServiceAreaFacilty to parameters, serviceAreaParameters.setFacilities(serviceAreaFacility).
  5. Get ServiceAreaResult by solving the service area task using parameters, task.solveServiceAreaAsync(serviceAreaParameters).get().
  6. Get any ServiceAreaPolygons that were returned, serviceAreaResult.getResultPolygons(facilityIndex).
    • facilityIndex is the faciltiy from the map view that you want to get the services areas of
  7. Display services areas to map view, graphicsOverlay.getGraphics().add(new Graphic(serviceAreaPolygon.getGeometry(), fillSymbol)).

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.na.service_area_task;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class ServiceAreaTaskSample extends Application {

  private static ServiceAreaTaskController controller;

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

    // set up the scene
    FXMLLoader loader = new FXMLLoader(getClass().getResource("/fxml/service_area_task.fxml"));
    Parent root = loader.load();
    controller = loader.getController();
    Scene scene = new Scene(root);

    // set title, size, and add scene to stage
    stage.setTitle("Service Area Task Sample");
    stage.setWidth(800);
    stage.setHeight(700);
    stage.setScene(scene);
    stage.show();
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {
    controller.terminate();
  }

  /**
   * 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