: He toggled the "Settlements" button, which revealed which towns weren't technically finished, even if they looked completed on the in-game PDA.

The tool has also helped uncover mysteries and bugs within the game. For instance, players have used the Map Viewer to identify bugged settlements in areas like the Senjakala Islands, where destroying certain objects in the wrong order can prevent a location from reaching 100%. It also revealed that some save files might actually contain more than the "standard" number of destructible objects, such as a 501st gas pump. If you're ready to hunt down those last few items,

Without this tool, you are driving blind. With it, you become the true dictator of chaos.

The primary function of the Jc2 Map Viewer is its ability to read world files. When you have a scanned paper map, the image itself doesn't know where it is on Earth. The world file (e.g., topo_map.jgw ) tells the software the pixel-to-coordinate scale, rotation, and location. The viewer instantly warps the image correctly in memory, allowing users to overlay crosshairs on precise latitude/longitude or grid coordinates.