Schematic illustration showing the buffer area (the gray region) circumscribing the studied linear feature (outlined in black) with a width of W_b = 1 R for a crater with a radius of R, and the counted post-formation craters (the red circles) by the BCC approach (a). Examples of the identified BCC craters (the red circles) in a segment of Rima Mairan (blue curves) and their corresponding buffer areas ( in this study; delineated by the green curves) (b).