Read GeoPackage

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Add rasters and feature tables from a GeoPackage to a map.

Image of read GeoPackage

Use case

The OGC GeoPackage specification defines an open standard for sharing raster and vector data. You may want to use GeoPackage files to support file-based sharing of geographic data.

How to use the sample

When the sample loads, the feature tables and rasters from the GeoPackage are shown on the map.

How it works

  1. Open the GeoPackage with a path and load it using geoPackage.loadAsync().
  2. Iterate through available rasters, exposed by geopackage.getGeoPackageRasters().

    • For each raster, create a new Rasterlayer(geopackageRaster), then add it to the map.
  3. Iterate through available feature tables, exposed by geopackage.getGeoPackageFeatureTables().

    • For each feature table, create a new FeatureLayer(geopackageFeatureTable), then add it to the map.

Relevant API

  • GeoPackage
  • GeoPackageFeatureTable
  • GeoPackageRasters

Offline Data

  1. Download the data from ArcGIS Online.
  2. Extract the contents of the downloaded zip file to disk.
  3. Open your command prompt and navigate to the folder where you extracted the contents of the data from step 1.
  4. Push the data into the scoped storage of the sample app: adb push AuroraCO.gpkg /Android/data/com.esri.arcgisruntime.sample.readgeopackage/files/AuroraCO.gpkg

About the data

This sample features a GeoPackage with datasets that cover Aurora, Colorado: Public art (points), Bike trails (lines), Subdivisions (polygons), Airport noise (raster), and liquour license density (raster).

Additional information

GeoPackage uses a single SQLite file (.gpkg) that conforms to the OGC GeoPackage Standard. You can create a GeoPackage file (.gpkg) from your own data using the create a SQLite Database tool in ArcGIS Pro.

Tags

container, layer, map, OGC, package, raster, table

Sample Code

MainActivity.java
                                                                                                                 
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/*
 * 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.arcgisruntime.sample.readgeopackage;

import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.data.GeoPackage;
import com.esri.arcgisruntime.data.GeoPackageFeatureTable;
import com.esri.arcgisruntime.layers.FeatureLayer;
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.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.raster.GeoPackageRaster;

public class MainActivity extends AppCompatActivity {

  private final static String TAG = MainActivity.class.getSimpleName();

  private MapView mMapView;
  // objects that implement Loadable must be class fields to prevent being garbage collected before loading
  private GeoPackage mGeoPackage;

  @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);

    // inflate MapView from layout
    mMapView = findViewById(R.id.mapView);

    // create a new map centered on Aurora Colorado and add it to the map view
    ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS);
    mMapView.setMap(map);
    mMapView.setViewpoint(new Viewpoint( 39.7294, -104.8319, 1000000));

    // open and load the GeoPackage
    mGeoPackage = new GeoPackage(getExternalFilesDir(null) + getString(R.string.geopackage_path));
    mGeoPackage.loadAsync();
    mGeoPackage.addDoneLoadingListener(() -> {
      if (mGeoPackage.getLoadStatus() == LoadStatus.FAILED_TO_LOAD) {
        String error = "Geopackage failed to load: " + mGeoPackage.getLoadError();
        Log.e(TAG, error);
        Toast.makeText(this, error, Toast.LENGTH_LONG).show();
        return;
      }

      // loop through each GeoPackageRaster
      for (GeoPackageRaster geoPackageRaster : mGeoPackage.getGeoPackageRasters()) {
        // create a RasterLayer from the GeoPackageRaster
        RasterLayer rasterLayer = new RasterLayer(geoPackageRaster);

        // set the opacity on the RasterLayer to partially visible
        rasterLayer.setOpacity(0.55f);

        // add the layer to the map
        mMapView.getMap().getOperationalLayers().add(rasterLayer);
      }

      // loop through each GeoPackageFeatureTable
      for (GeoPackageFeatureTable geoPackageFeatureTable : mGeoPackage.getGeoPackageFeatureTables()) {
        // create a FeatureLayer from the GeoPackageFeatureLayer
        FeatureLayer featureLayer = new FeatureLayer(geoPackageFeatureTable);

        // add the layer to the map
        mMapView.getMap().getOperationalLayers().add(featureLayer);
      }
    });
  }

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

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

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

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