The same cylinder over each field, 40 NM radius (80 NM across) with an 11,000 ft ceiling, so terrain is the only variable. Over New York the cylinder is nearly full air; over Mexico City the mountains fill the bottom. Each cylinder is a shared cluster: New York works Kennedy, Newark and LaGuardia; Mexico City works Benito Juárez, Toluca and Santa Lucía. Drag either scope to rotate it on its own.
MethodEqual 40 NM radius cylinder, 11,000 ft ceiling above each field; terrain subtracted from the bottom. Volumes are true scale; the vertical exaggeration only stretches the view for legibility, while the chart above is the un-exaggerated read of the same cylinder. Public inputs only: terrain, field coordinates, published arrival routes.