neighbours_ring
neighbours_ring calls ring2nest, neighbours_nest and nest2ring
neighbours_ring , 4, 1, list, nneigh | |
print,nneigh,list |
will return:8 16 6 5 0 3 2 8 7 listing the RING-indexed 8 neighbors of pixel #1 for Nside=4
Version 3.50, 2018-12-10