Minecraft wiki entry for Map, associated text: Maps are always aligned to a grid at all zoom levels. That means zooming out any different map in a specific area covered by that map always has the same center. As such, maps are aligned by map width (1024 blocks for a level 3 maps) minus 64. A level 3 map generated at spawn covers X and Z coordinates from -64 to 959. All maps generated in this area zoom out to the same coordinates, guaranteeing that they are always 'aligned' on a map wall. For a zoomed out map to cover a new area, it must start with a base (level 0) map that is in that area.