View point cloud data offline

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Sample viewer app

Display local 3D point cloud data.

Image of view point cloud data offline

Use case

Point clouds are often used to visualize massive sets of sensor data such as lidar. The point locations indicate where the sensor data was measured spatially, and the color or size of the points indicate the measured/derived value of the sensor reading. In the case of lidar, the color of the visualized point could be the color of the reflected light, so that the point cloud forms a true color 3D image of the area.

Point clouds can be loaded offline from scene layer packages (.slpk).

How to use the sample

The sample starts with a point cloud layer loaded and draped on top of a scene. Pan and zoom to explore the scene and see the detail of the point cloud layer.

How it works

  1. Create a PointCloudLayer with the path to a local .slpk file containing a point cloud layer.
  2. Add the layer to a scene's operational layers collection with getOperationalLayers().add(pointCloudLayer).

Relevant API

  • PointCloudLayer

About the data

This point cloud data comes from Balboa Park in San Diego, California. Created and provided by USGS.

Offline Data

  1. Download the data from ArcGIS Online.
  2. Open your command prompt and navigate to the folder where you extracted the contents of the data from step 1.
  3. Push the data into the scoped storage of the sample app: adb push sandiego-north-balboa-pointcloud.slpk /Android/data/com.esri.arcgisruntime.sample.viewpointclouddataoffline/files/sandiego-north-balboa-pointcloud.slpk

Tags

3D, lidar, point cloud

Sample Code

MainActivity.java
                                                                                             
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/*
 * Copyright 2019 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.viewpointclouddataoffline;

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

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.layers.PointCloudLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.Camera;
import com.esri.arcgisruntime.mapping.view.SceneView;

public class MainActivity extends AppCompatActivity {

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

  private SceneView mSceneView;

  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mSceneView = findViewById(R.id.sceneView);

    // create a scene and add it to the scene view
    ArcGISScene scene = new ArcGISScene(Basemap.createImagery());
    mSceneView.setScene(scene);

    // create a camera and initial camera position
    Camera camera = new Camera(32.7321157, -117.150072, 452.282774, 25.481533, 78.0945859, 0.0);

    // set viewpoint for SceneView using camera
    mSceneView.setViewpointCamera(camera);

    // set the base surface with world elevation
    Surface surface = new Surface();
    surface.getElevationSources().add(new ArcGISTiledElevationSource(getString(R.string.elevation_source_url)));
    scene.setBaseSurface(surface);

    // add a PointCloudLayer to the scene by passing the URI of the scene layer package to the constructor
    PointCloudLayer pointCloudLayer = new PointCloudLayer(
        getExternalFilesDir(null) + getString(R.string.scene_layer_package_location));

    // add the PointCloudLayer to the operational layers of the scene
    mSceneView.getScene().getOperationalLayers().add(pointCloudLayer);

    // add a listener to perform operations when the load status of the PointCloudLayer changes
    pointCloudLayer.addDoneLoadingListener(() -> {
      if (pointCloudLayer.getLoadStatus() != LoadStatus.LOADED) {
        // notify user that the PointCloudLayer has failed to load
        String error = "Point cloud layer failed to load: " + pointCloudLayer.getLoadError().getMessage();
        Toast.makeText(this, error, Toast.LENGTH_LONG).show();
        Log.e(TAG, error);
      }
    });
  }

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

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

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

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