He doesn't have a doubt. He has a question.
It would be helpful if some actual data was attached.
I'm going to assume that the indices of the 2-D array are what is to be translated into the X and Y values. Now you said you have a 64 x 64 array. But X and Y from -31 to 31 is only 63 elements in each.
What I would do is create a nested For Loop. Autoindex on the 2-D array at each boundary. Use the i value of the For Loops and subtract 32. In the inner For Loop you can bundle the inner loop's i value, the outer loop's i value, and the value of the array into a cluster of XYZ. Take that cluster and auto-index on the output tunnels and you'll have an array of XYZ clusters. (On the outer loop, you can make it a concatenating tunnel so it becomes a 1-D array of all the 1-D arrays coming from the inner loop.)
