The SDSS main sample supercluster map. Different symbol types and sizes show the density threshold levels used to delineate the superclusters; blue points: D ≤ 3.0, green squares: 4.0 < D ≤ 4.5, and red rings: D > 4.5. The map is the 2D projection of the whole supercluster sample. Substantial differences in the levels can be seen e.g., in the regions around (−60, 300) and at the Sloan Great Wall region at (0, 220).