1) Click "Draw AOI Polygon" to define your area.
2) Double-click (or click first vertex) to finish.
3) For smaller AOIs (<2.5×2.5 km) we request ~1 m resolution.
4) Larger AOIs are clamped at 2500 px in the bigger dimension.
5) If area > 200 km² we tile automatically (~200 km² each).