Maps of filaments on a Cartesian x − y plane. The x-axis is aligned with increasing redshift, and the y-axis with increasing right ascension. The galaxy distribution is colour-coded according to local density as measured by the DTFE, and filaments are over-plotted in green. Three ranges of declination are considered for clarity, as marked at the top of each panel. Only the LOWZ+CMASS is considered. As an example, filaments detected with a 3σ persistence threshold and no smoothing of the density field have been reported. No cleaning of the skeleton is performed to show the full distribution of filaments as recovered by DisPerSE.