Schematic describing how the customised footprint for TPCF computation is generated using the positions of young SFCs in NGC 5457. The background image over which the contours are drawn is a 180 × 180 pixel number density map of the SFC distribution. The white dots represent individual SFCs and the green contours mark the customised footprint of the SFC distribution within which random data points need to be populated for the TPCF calculation. See Section 4.6 for more details.