I've spent 5 straight hours in the map, and I have yet to find a chart or GPS, and turning the map on using the advanced settings give me a poorly zoomed version of the map, what I means
is the bottom right of the chart view is actually a train station but it's not visible on the map, only the "no build zone" is partially shown, this is even worse for the top right, where Fort knell is supposed to be(assuming), since on the chart, the location is not visible, only the bottom left of the "no build zone" can be seen, the satellite view shows a wierd looking area instead (the no build zones not avaliable on GPS) which im assuming is the deadzone of Fort knell. This leads me to believe that the gps/chart is either super rare or doesn't exist, is it located in the deadzones or something?