Raster Layer GeoPackage

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<h1>Raster Layer GeoPackage</h1>

<p>Display raster data from a geopackage.</p>

<p><img src="RasterLayerGeoPackage.png"/></p>

<h2>How it works</h2>

<p>To add a<code>RasterLayer</code> as an operational layer from a <code>GeoPackage</code>:</p>
<ol>
  <li>Create and load a <code>GeoPackage</code>, specifying the path to the local .gpkg file.</li>
  <li>When it is done loading, get the <code>GeoPackageRaster</code>s inside with <code>geoPackage
  .getGeoPackageRasters()</code>.</li>
  <li>Construct a <code>RasterLayer</code> with the <code>GeoPackageRaster</code> in the list you want to use.</li>
  <li>Add the raster layer to the map as an operational layer <code>map.getOperationalLayers().add(rasterLayer)</code>.</li>
</ol>

<h2>Relevant API</h2>

<ul>
  <li>ArcGISMap</li>
  <li>Basemap</li>
  <li>GeoPackage</li>
  <li>GeoPackageRaster</li>
  <li>MapView</li>
  <li>RasterLayer</li>
</ul>

Code

RasterLayerGeoPackageSample.java

/*
 * Copyright 2018 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.raster_layer_geopackage;

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.data.GeoPackage;
import com.esri.arcgisruntime.layers.RasterLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.raster.GeoPackageRaster;

public class RasterLayerGeoPackageSample 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 GeoPackage");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // create a map with light gray canvas vector basemap
      ArcGISMap map = new ArcGISMap(Basemap.createLightGrayCanvasVector());
      mapView = new MapView();
      mapView.setMap(map);

      // create a geopackage from a local gpkg file
      GeoPackage geoPackage = new GeoPackage(new File("./samples-data/auroraCO/AuroraCO.gpkg").getAbsolutePath());

      // load the geopackage
      geoPackage.loadAsync();
      geoPackage.addDoneLoadingListener(() -> {
        if (geoPackage.getLoadStatus() == LoadStatus.LOADED && geoPackage.getGeoPackageRasters().size() > 0) {
          // get the geopackage raster
          GeoPackageRaster raster = geoPackage.getGeoPackageRasters().get(0);

          // create a raster layer and add it to the map
          RasterLayer rasterLayer = new RasterLayer(raster);
          rasterLayer.setOpacity(0.7f);
          map.getOperationalLayers().add(rasterLayer);

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

        } else {
          Alert alert = new Alert(Alert.AlertType.ERROR, "Failed to load geopackage");
          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);
  }

}