Example of a density map of a cluster 10 × 10 Mpc² field, constructed using a Gaussian kernel of width σ = 0.1875 Mpc. The colourbar reflects the signal-to-noise ration (S/N). Only galaxies with m < m^* + 3 (or L >0.06 L^*) are selected and the photometric redshift width depends on the galaxy magnitudes and is taken to ensure 68% completeness. The red contours indicate the structures detected by wazp, and the white ones show the masked regions. The green inner circle shows 1 Mpc around the cluster X-ray centre and the dashed green lines delimitate the local background field from 3 to 5 Mpc. NB: we can see that this cluster is part of a superstructure.