This surface atlas was prepared by this software:
https://github.com/jcupitt/SurfaceAtlasConstruction/tree/revise-scripts
Which in turn was derived from this software:
https://github.com/jelenabozek/SurfaceAtlasConstruction
Which is described in this paper:
Construction of a neonatal cortical surface atlas using Multimodal Surface Matching in the Developing Human Connectome Project, Bozek et al., Neuroimage, 179, p. 11-29, 2018
All 980 neonatal dHCP scans that passed structural pipeline QC were used, with no attempt to remove duplicate subjects:
https://biomedia.github.io/dHCP-release-notes/
The construction was run for eight iterations. Sigma was set to 1.0, but allowed to rise up to 2.5 at the age extremes.