Create terrain surface from a local tile package

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Sample viewer app

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

Create terrain from a 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

Create an AGScene and add it to a AGSSceneView.
Create an AGSArcGISTiledElevationSource with the path to the local tile package.
Add this source to the scene's base surface.

Relevant API

AGSArcGISTiledElevationSource
AGSSurface

Offline data

This sample uses the Monterey Elevation tile package, using CompactV2 storage format (.tpkx). It is downloaded from ArcGIS Online automatically.

About the data

This terrain data comes from Monterey, California.

Additional information

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

Sample Code

CreateTerrainSurfaceFromLocalTilePackageViewController.swift
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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.

import UIKit
import ArcGIS

class CreateTerrainSurfaceFromLocalTilePackageViewController: UIViewController {
    @IBOutlet weak var sceneView: AGSSceneView! {
        didSet {
            // Initialize the scene with imagery basemap.
            sceneView.scene = makeScene()

            // Set initial scene viewpoint.
            let camera = AGSCamera(latitude: 36.525, longitude: -121.80, altitude: 300.0, heading: 180, pitch: 80, roll: 0)
            sceneView.setViewpointCamera(camera)
        }
    }

    func makeScene() -> AGSScene {
        let scene = AGSScene(basemapStyle: .arcGISImagery)

        // Create an elevation source using the path to the tile package.
        let surface = AGSSurface()
        let tpkURL = Bundle.main.url(forResource: "MontereyElevation", withExtension: "tpkx")!
        let elevationSource = AGSArcGISTiledElevationSource(url: tpkURL)
        surface.elevationSources.append(elevationSource)
        scene.baseSurface = surface

        return scene
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // Add the source code button item to the right of navigation bar.
        (self.navigationItem.rightBarButtonItem as! SourceCodeBarButtonItem).filenames = ["CreateTerrainSurfaceFromLocalTilePackageViewController"]
    }
}