Add elevation source from tile package | ArcGIS Maps SDK for Swift

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

Screenshot of Add elevation source from tile package sample

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 a Scene and add it to a SceneView.
Create an ArcGISTiledElevationSource with the path to the local tile package.
Add the source to the scene’s base surface.

Relevant API

ArcGISTiledElevationSource
Surface

Offline data

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

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

AddElevationSourceFromTilePackageView.swift

// Copyright 2024 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
//
//   https://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 ArcGIS
import SwiftUI

struct AddElevationSourceFromTilePackageView: View {
    /// A scene with elevation for Monterey, California.
    @State private var scene: ArcGIS.Scene = {
        let scene = Scene(basemapStyle: .arcGISImagery)

        // Creates the tiled elevation source using a URL.
        let rasterElevationSource = ArcGISTiledElevationSource(url: .montereyElevationTilePackage)

        // Creates a surface to add the elevation source to the scene.
        let surface = Surface()
        surface.addElevationSource(rasterElevationSource)
        scene.baseSurface = surface

        // Sets the scene's initial camera to showcase the elevation.
        let camera = Camera(
            latitude: 36.525,
            longitude: -121.8,
            altitude: 300,
            heading: 180,
            pitch: 80,
            roll: 0
        )
        let viewpoint = Viewpoint(latitude: .nan, longitude: .nan, scale: .nan, camera: camera)
        scene.initialViewpoint = viewpoint

        return scene
    }()

    var body: some View {
        // Displays the scene in a scene view.
        SceneView(scene: scene)
    }
}

private extension URL {
    /// The URL to the local tile package file with elevation data for Monterey, California.
    static var montereyElevationTilePackage: URL {
        Bundle.main.url(forResource: "MontereyElevation", withExtension: "tpkx")!
    }
}