There are multiple polluted areas in the map, which are highly sought after because they are places where people can build Acid Farms and where Startrace Ores spawn. There is still a merit in adding it to the map even though the live map can detect startrace ores. Attached here are examples of polluted areas (along with their in game coordinates) Here is also an example from a chinese interactive map that displays the polluted fields in The Way of Winter scenario. <qrsj-map.lzhailalu.com/> Though I am not sure if these are user mapped regions or if they have gotten it from the game files.