K band surface brightness sky map (orthographic projection) of the eastern part of the Perseus-Pisces supercluster from 2MASS XSC objects with 8 ≤ K ≤ 14. The present survey field is indicated by the dark blue box, the hexagons indicate galaxy groups from Crook et al. (2007) with 0.016 ≲ z ≲ 0.030, each labelled with the number in the Low Density Contrast (LDC = L, green) or High Density Contrast (HDC = H; cyan) catalogue.