Real aerodynamics · real fences · the verdict in all 30 parks
Aerodynamic model: Alan Nathan drag + Magnus, RK4. Air density from temp / elevation / humidity. Spin is estimated (Statcast doesn't publish batted-ball spin). Fence heights + elevation are public approximations; fence distances are the real park polygons. The 30-park grid is a model and can be off by a park or two vs the Statcast count shown on a real ball — Statcast uses each park's full fence outline.