deck.gl Terrain + SolidPolygonLayer Demo

Basic React + Vite app showing a TerrainLayer (Mapbox elevation + satellite texture) and a SolidPolygonLayer draped over the terrain using TerrainExtension.

Steps to reproduce

1. Create .env.local (copy from .env.example) and set your Mapbox token:

   VITE_MAPBOX_TOKEN=pk.your_token_here
   

2. Install deps & run:

   npm install
   npm run dev
   

3. Open the printed local URL (usually http://localhost:5173).

Click the orange polygon to see console logs (info.index, info.object). You'll see that the console shows an erroneous pick, with a high index value.

Notes

• If no token is provided you'll still see a warning and terrain tiles will also fail (they require the same token) – add a valid token for full functionality.
• Adjust initialViewState or polygonData in src/App.jsx as needed.