• 🏙️ 1 — Urban / Built-up
• 🌾 2 — Agricultural
• 🌿 3 — Rangeland
• 🌲 4 — Forest
• 💧 5 — Water
• 🪷 6 — Wetland
• 🪨 7 — Barren Land
• ❄️ 8 — Tundra
• 🧊 9 — Perennial Snow / Ice

📚 Level II adds 37 subclasses total — used as the standard hierarchical scheme for RS data.