Data coverage chart. The color scale represents the percentage of observed and unsaturated pixels in each pair of region and map. Spitzer/IRAC data, which has no saturated pixels in the regions studied, is not shown here. The numbers account for the amount of pixels replaced through astrofix (example: in G012.80, the Hi-GAL 160 µm map has 6 saturated pixels that were interpolated). Maps that are either missing or discarded from the analysis are hatched.