Copy from the Human Connectome Project (HCP) pipeline
surface: 32k_fs_LR surface, 32492 vertices per hemisphere
L.atlasroi.32k_fs_LR.shape.gii: 29696 non-zero vertices
R.atlasroi.32k_fs_LR.shape.gii: 29716 non-zero vertices
Atlas_ROIs.2.nii.gz: 31870 voxels
surface: 10k_fs_LR surface, 10242 vertices (the same number of vertices to fs5) per hemisphere
L.atlasroi.10k_fs_LR.shape.gii: 9368 non-zero vertices
R.atlasroi.10k_fs_LR.shape.gii: 9371 non-zero vertices
Atlas_ROIs.3.nii.gz: 9485 voxels
surface: 2k_fs_LR surface, 2562 vertices (the same number of vertices to fs4) per hemisphere
L.atlasroi.2k_fs_LR.shape.gii: 2343 non-zero vertices
R.atlasroi.2k_fs_LR.shape.gii: 2344 non-zero vertices
Atlas_ROIs.4.nii.gz: 3930 voxels