Relation between fractal dimension and the corrected distance of the Pang catalog clusters (left panels) and the Hunt catalog clusters (right panels) in the solar neighborhood for the all-member region (a and d), r ≤ r_t (b and e), and r > r_t (c and f). The quantity s is Spearman’s rank correlation coefficient, and p is the probability of the null hypothesis in the correlation test. A p-value below 0.05 indicates a rejection of the null hypothesis.