Raster layer (file)

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Sample viewer app

Create and use a raster layer made from a local raster file.

Image of apply raster layer file

Use case

Rasters can be digital aerial photographs, imagery from satellites, digital pictures, or even scanned maps. An end-user will frequently need to import raster files acquired through various data-collection methods into their map to view and analyze the data.

How to use the sample

When the sample starts, a raster will be loaded from a file and displayed in the map view.

How it works

  1. Create a Raster from a raster file.
  2. Create a RasterLayer from the raster.
  3. Add it as an operational layer with map.getOperationalLayers().add(rasterLayer).

Relevant API

  • Raster
  • RasterLayer

Additional information

See the topic What is raster data? in the ArcMap documentation for more information about raster images.

Tags

data, image, import, layer, raster, visualization

Sample Code

RasterLayerFileSample.java
                                                                                                                 
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/*
 * 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.raster_layer_file;

import java.io.File;

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

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.layers.RasterLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.raster.Raster;

public class RasterLayerFileSample extends Application {

  private MapView mapView;

  @Override
  public void start(Stage stage) {

    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("Raster Layer File");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // authentication with an API key or named user is required to access basemaps and other location services
      String yourAPIKey = System.getProperty("apiKey");
      ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);

      // create a raster from a local raster file
      Raster raster = new Raster(new File(System.getProperty("data.dir"), "./samples-data/raster/Shasta.tif").getAbsolutePath());

      // create a raster layer
      RasterLayer rasterLayer = new RasterLayer(raster);

      // create a map with the standard imagery basemap style
      ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_IMAGERY_STANDARD);

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

      // add the raster layer to the map's operational layers
      map.getOperationalLayers().add(rasterLayer);

      // set viewpoint on the raster
      rasterLayer.addDoneLoadingListener(() -> {
        if (rasterLayer.getLoadStatus() == LoadStatus.LOADED) {
          mapView.setViewpointGeometryAsync(rasterLayer.getFullExtent(), 150);
        } else {
          Alert alert = new Alert(Alert.AlertType.ERROR, "Raster Layer Failed to Load!");
          alert.show();
        }
      });

      // add the map view to stack pane
      stackPane.getChildren().addAll(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() {

    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);
  }

}

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