Create terrain from local tile package

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Set the terrain surface with elevation described by a local tile package.

Image of create terrain from local tile package

Use case

In a scene view, the terrain surface is what the basemap, operational layers, and graphics are draped onto. For example, when viewing a scene in a mountainous region, applying a terrain surface to the scene will help in recognizing the slopes, valleys, and elevated areas.

How to use the sample

When loaded, the sample will show a scene with a terrain surface applied. Pan and zoom to explore the scene and observe how the terrain surface allows visualizing elevation differences.

How it works

  1. Create a Scene and add it to a SceneView.
  2. Create an ArcGISTiledElevationSource with the path to the local tile package.
  3. Add this source to the scene's base surface: Scene.BaseSurface.ElevationSources.Add(tiledElevationSource).

Relevant API

  • ArcGISTiledElevationSource
  • Surface

Additional information

The tile package must be a LERC (limited error raster compression) encoded TPK. Details on can be found in the topic Share a tile package in the ArcGIS Pro documentation.

Tags

3D, elevation, LERC, surface, terrain, tile cache

Sample Code

CreateTerrainSurfaceTilePackage.cs
                                                                                          
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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.

using ArcGISRuntime;
using ArcGISRuntime.Samples.Managers;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;

namespace ArcGISRuntimeXamarin.Samples.CreateTerrainSurfaceTilePackage
{
    [Register("CreateTerrainSurfaceTilePackage")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Create terrain from local tile package",
        category: "Scene",
        description: "Set the terrain surface with elevation described by a local tile package.",
        instructions: "When loaded, the sample will show a scene with a terrain surface applied. Pan and zoom to explore the scene and observe how the terrain surface allows visualizing elevation differences.",
        tags: new[] { "3D", "LERC", "elevation", "surface", "terrain", "tile cache" })]
    [ArcGISRuntime.Samples.Shared.Attributes.OfflineData("cce37043eb0440c7a5c109cf8aad5500")]
    public class CreateTerrainSurfaceTilePackage : UIViewController
    {
        // Hold references to UI controls.
        private SceneView _mySceneView;

        public CreateTerrainSurfaceTilePackage()
        {
            Title = "Create terrain surface from a tile package";
        }

        private void Initialize()
        {
            // Create the scene.
            _mySceneView.Scene = new Scene(BasemapStyle.ArcGISImageryStandard);

            // Get the path to the elevation tile package.
            string packagePath = DataManager.GetDataFolder("cce37043eb0440c7a5c109cf8aad5500", "MontereyElevation.tpk");

            // Create the elevation source from the tile cache.
            TileCache elevationCache = new TileCache(packagePath);
            ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(elevationCache);

            // Create a surface to display the elevation source.
            Surface elevationSurface = new Surface();

            // Add the elevation source to the surface.
            elevationSurface.ElevationSources.Add(elevationSource);

            // Add the surface to the scene.
            _mySceneView.Scene.BaseSurface = elevationSurface;

            // Set an initial camera viewpoint.
            Camera camera = new Camera(36.525, -121.80, 300.0, 180, 80.0, 0.0);
            _mySceneView.SetViewpointCamera(camera);
        }

        public override void LoadView()
        {
            // Create the views.
            View = new UIView() { BackgroundColor = ApplicationTheme.BackgroundColor };

            _mySceneView = new SceneView();
            _mySceneView.TranslatesAutoresizingMaskIntoConstraints = false;

            // Add the views.
            View.AddSubviews(_mySceneView);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                _mySceneView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _mySceneView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
                _mySceneView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _mySceneView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor)
            });
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            Initialize();
        }
    }
}

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