Blog
How the dataset is built, measured and validated — racing data engineering in the open. No tips, no predictions; just the work.
Why building an honest racing rating is harder than it looks
9 August 2026
Our data supplier withdrew the ratings we displayed, so we built our own — and audited, measured and corrected everything on the way. Fabricated dead-heats, a data source that measured itself, a regression broken by the handicapper doing their job, and a rating that inflated until we anchored it. The full story behind VPR.
How we measure racecourses from open geodata
31 July 2026
Track centrelines from OpenStreetMap, terrain from Copernicus EU-DEM, turns from curvature — the complete method behind the open course-topology dataset, including every course we can't yet measure and why.