Table 1.
Sampling the catalogue of filamentary spines and the two galaxy datasets.
| Subsample | Distance (Mpc) |
 (deg) |
N | Sample notation |
|---|---|---|---|---|
| Non-perpendicular filaments | 200 − 800 |
 |
30 639 | filnotperp |
| Perpendicular filaments | 200 − 800 |
 |
8063 | filperp |
| Filaments | 200 − 800 | All  |
38 702 | Filall |
| Filaments | 200 − 400 | All  |
20 367 | Fil200 − 400 |
| Filaments | 400 − 600 | All  |
14 598 | Fil400 − 600 |
| Filaments | 600 − 800 | All  |
3 737 | Fil600 − 800 |
| Spectroscopic galaxies | 200 − 800 | – | 497 611 | SpecAll |
| Spectroscopic galaxies inside filaments | 200 − 800 | All  |
139 051 | Specfilall |
| Spectroscopic galaxies inside perpendicular filaments | 200 − 800 |
 |
28 486 | Specfilperp |
| Spectroscopic galaxies inside non-perpendicular filaments | 200 − 800 |
 |
110 565 | Specfilnotperp |
| Photometric galaxies | 200 − 800 | – | 2 198 702 | Photoall |
| Masked photometric galaxies (a) | 200 − 800 | – | 570 083 | photomask |
| Photometric galaxies | 200 − 400 | – | 236 850 | Photo200 − 400 |
| Photometric galaxies | 400 − 600 | – | 802 970 | Photo400 − 600 |
| Photometric galaxies | 600 − 800 | – | 1 158 882 | Photo600 − 800 |
Notes. Sampling is conditioned on datasets in the distance range of 200 − 800 Mpc. The notation N represents the counting measure, the distance is the object distance from the observer, and 
is the average angle of the filamentary spine corresponding to the lines of sight (Eq. (2)). Perpendicular filaments and non-perpendicular filaments are the spines that are or are not perpendicular towards the line of sight, respectively.
Masked-out photometric galaxies in the observed region of the sphere dependent on the locations of spectroscopic galaxies. A detailed description is given in Sect. 4.1.
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