Fitting cluster length measurements to 2-D maps. In both left panels, each of the red lines represent a slice, or a 1-D sample, of the 2-D map, with the associated 1-D slices plotted on the right. (A) GJ length measurements are obtained by averaging the length of all continuous GJ segments over all slices (yellow, value of 1). (B) Plicate length measurements are obtained by averaging the length of all continuous plicate segments over all slices, from both levels (blue or yellow, h = 0 or 1).