What every print stands on

The map

© OpenStreetMap contributors, Open Database License 1.0.

Every lap is drawn from OpenStreetMap, read through the Overpass API (overpass-api.de, run by FOSSGIS e.V., and VK's public instance at maps.mail.ru) and searched through Nominatim. openstreetmap.org/copyright

The measurement

T. Vincenty, Survey Review 23(176), 1975.

Tested against C. F. F. Karney, Test set for geodesics, Zenodo, doi:10.5281/zenodo.32156, released under CC0.

The heights

AWS Terrain Tiles.

From 3DEP, SRTM, GMTED and ETOPO1, among others, served by Amazon Web Services' open data programme.

The faces

Unbounded and IBM Plex, under the SIL Open Font License.

Unbounded by NORD ID; IBM Plex Sans and IBM Plex Mono by IBM and Bold Monday. IBM Plex Mono sets the figures in the Timing style and nowhere else.

The published lengths

Each circuit's own figure, where we found it, and the day we read it.

• Monza: 5793 m, quoted from “5793 meters”, read 2026-10-12
• Brands Hatch: 2.433 mi, quoted from “2.433M / 3.916KM”, read 2026-10-12
• Spielberg: 4.326 km, quoted from “4,326 km”, read 2026-10-12
• Imola: 4909 m, quoted from “sui 4.909 metri del tracciato dell'Enzo e Dino Ferrari”, read 2026-10-12
• Mugello: 5245 m, quoted from “5.245 m. Track”, read 2026-10-12
• Hungaroring: 4.381 km, quoted from “Circuit length 4.381 km”, read 2026-10-12
• Catalunya: 4.657 km, quoted from “4.657 km track”, read 2026-10-12
• Portimão: 4684 m, quoted from “Length > 4,684 m”, read 2026-10-12
• Donington Park: 2.49 mi, quoted from “2.49M / 4.02KM”, read 2026-10-12
• Lime Rock: 1.5 mi, quoted from “1.5-mile natural terrain road course”, read 2026-10-12
• Interlagos: 4309 m, quoted from “possui atualmente 4.309 metros de extensão”, read 2026-10-12
• Suzuka: 5.807 km, quoted from “Total Length: 4 wheels: 5.807 km　2 wheels: 5.821 km”, read 2026-10-12
• Fuji: 4563 m, quoted from “4,563m”, read 2026-10-12
• Sepang: 5543 m, quoted from “The 5,543-meter-long track features 15 corners and 8 straights including two high-speed stretches.”, read 2026-10-12
• Phillip Island: 4.445 km, quoted from “Victoria's thrilling 4.445 km Phillip Island Circuit”, read 2026-10-12
• Circuit Gilles Villeneuve: 4361 m, quoted from “Circuit Gilles-Villeneuve is a 4,361-metre long car-racing track”, read 2026-10-12
• Assen: 4.542 km, quoted from “4.542 km”, read 2026-10-12
• Motegi: 4.8 km, quoted from “An international standard circuit with a total length of 4.8km, 14 corners (8 right, 6 left)”, read 2026-10-12
• Oulton Park: 2.69 mi, quoted from “2.69M / 4.30KM”, read 2026-10-12
• Snetterton: 3 mi, quoted from “3 Miles”, read 2026-10-12

The same list, with every circuit we've checked, is published as data.