Google Maps 3D Tiles Root JSON

Use this endpoint when you need to initialize a 3D tile rendering pipeline using Google Maps photorealistic 3D tiles. This is the entry point for any 3D tile streaming workflow — call it after obtaining a session via CreateSession. Prefer this over static map or 2D tile endpoints when you need full 3D scene geometry for visualization, AR, or simulation purposes.

• Missing or invalid session token returns 401 Unauthorized
• Expired tile session returns 403 Forbidden requiring a new CreateSession call
• Rate limiting returns 429 Too Many Requests
• Network timeout if tile servers are unreachable
• Malformed session parameters return 400 Bad Request