How to display 3D map in RealityKit?

Question

Is there existing library or 3rd party tools that can render something like this in RealityKit, given an arbitrary coordinate?

I tried adding MapKit with .realistic elevations in RealityView, but it's rendered as a flat surface.

Map(
    initialPosition: .camera(
      MapCamera(centerCoordinate: someCoordinate, distance: 2000, heading: 0, pitch: 45))
)
.mapStyle(.standard(elevation: .realistic))

Answer 1

In visionOS 1.1, Apple MapKit's (like any other map-generating framework) maps can't be rendered as real 3D objects (even when Realistic Elevation is turned on). The maps can show pseudo 3D elevation only on a flat 2D layer, the same way as SceneKit's 3D scene is rendered as 2D view in visionOS.

import SwiftUI
import RealityKit
import MapKit

@main struct YourApp : App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        .windowStyle(.volumetric)
        .defaultSize(width: 0.5, height: 0.5, depth: 0.5, in: .meters)
    }
}

---

struct ContentView : View {
    let map = Map(initialPosition:
            .camera(MapCamera(centerCoordinate: .init(latitude: 38.897957, 
                                                     longitude: -77.036560), 
                                      distance: 2000, heading: 0, pitch: 45))
    )
    var body: some View {
        map
            .mapStyle(.standard(elevation: .realistic))
            .mask(Circle())
            .rotation3DEffect(.degrees(90), axis: .x)
            .frame(depth: 900, alignment: .center)
        
        RealityView { content in
            let cylinder = ModelEntity(mesh: .generateCylinder(height: 0.05, 
                                                               radius: 0.14))
            cylinder.position += [0.0, 0.22, 0.08]
            content.add(cylinder)
        }
    }
}

Here is only one solution: create 3D elevation objects yourself.