I am trying to create a map-art in Minecraft. The standard map is 128x128 blocks in size, so I have built a 128x128 pixel art. However, I am struggling to position myself when I create it such that only my creation shows on the map. I have rebuilt it so it lines up with the chunk borders. For reference, the map-art is 8x8 chunks. Am I misunderstanding something? Any help is greatly appreciated.

[![enter image description here](https://i.stack.imgur.com/hLZYD.jpg)](https://i.stack.imgur.com/hLZYD.jpg)