43R221 - LIEGE

Series: Unverified Air, no. 28

Day: 30 October 2026

Place: Herstal, Belgium

NO₂ (red): 55.5 µg/m³, the day’s highest hour, 11:00 UTC

O₃ (blue): 48.5 µg/m³, the day’s highest hour, 13:00 UTC

Wind: from 61°, 8 km/h, at 11:00 UTC

Station code: BETR221

Station type: urban background

Network: Wallonia

Inlet height: 3 m

Coordinates: 50.65844 N, 5.62784 E

Buildings: 74, 1.7–16.3 m high

Heights: 100 % measured, from the official building register (Belgium, Wallonie), Microsoft building footprints via EUBUCCO

Lines: 1,613 black, 1,614 red, 410 blue

Line length: 54 m in total

Made: 31 October 2026, 09:08:42 UTC, in 466 s, on the gallery’s server in Helsinki, Finland

Size: A3, 297 × 420 mm (plotted); 2376 × 3360 px (this image)