How do I create a wall of maps with item frames?

Solution 1:

Turns out the problem was that I am really disorganised. I had my maps all over the place and couldn't wrap my head around it.

I started a new creative world to try from scratch, but this time I organised every map in my inventory in the same formation that it would be on the item frames:

enter image description here

I then created each map one by one, starting with the center, making sure I put it back in the correct position afterwards:

enter image description here

I did this until I had filled out every map:

enter image description here

After I had filled out all of the maps I put them in item frames row by row until I got this final result:

enter image description here