where can I found the relationship between the paf[:,:,number] and the joint part, for example paf[:,:, 16] with the right elbow

[Ai-is-light]

@michalfaber Thanks for your work . In the author's code
—— ax3x = axarr3.flat[m].imshow(paf[:,:,16], alpha=.5) # right elbow ,
where can I found the relationship between the paf[:,:,number] and the joint part, for example paf[:,:, 16] with the right elbow.

[Ai-is-light]

and, in the following code:

find connection in the specified sequence, center 29 is in the position 15

limbSeq = [[2,3], [2,6], [3,4], [4,5], [6,7], [7,8], [2,9], [9,10],
[10,11], [2,12], [12,13], [13,14], [2,1], [1,15], [15,17],
[1,16], [16,18], [3,17], [6,18]]

the middle joints heatmap correpondence

mapIdx = [[31,32], [39,40], [33,34], [35,36], [41,42], [43,44], [19,20], [21,22],
[23,24], [25,26], [27,28], [29,30], [47,48], [49,50], [53,54], [51,52],
[55,56], [37,38], [45,46]]
so, how should I understand the libSeq and the mapldx? the limbSeq list and mapldx list are set by author or other reasons? or according to the coco dataset?
thanks for any answers @michalfaber