A device receives distances between an access point, located on a floor of a building, and other access points located on the same floor, and determines, based on the distances, relative location information associated with the access point, where the relative location information provides a location of the access point relative to the other access points. The waterborne base coat composition comprises binder solids comprising about 20 to about 100 wt. The gate insulating layer is disposed between the gate electrode and the semiconductor layer.