A1.

Elliptical peak contours predicted from 2D SOT for 100 randomly distributed peaks and total peak capacity of 500. In a) and b), α = 0.103, t_s/¹σ = 2, and < β > = 1.36; in c) and d), α = 0.376, t_s/¹σ = 14, and < β > = 6.55. Ellipse areas are the same in panels a) and b), and in panels c) and d). a) ¹n_c = 50, %¹n_c = 10, ²n_c = 10, δ = 0.272, cluster number = 84; b) ¹n_c = 10, %¹n_c = 2, ²n_c = 50, δ = 6.81, cluster number = 88; c) ¹n_c = 50, %1 = 10,²n_c = 10, δ = 1.31, cluster number = 49; d) ¹n_c = 10, %¹n_c = 2, 2 = 50, δ = 32.7, cluster number = 57.