Maidenhead locators are also commonly referred to as QTH locators, grid locators or grid squares, although the 'squares' are distorted on any non- equirectangular cartographic projection. The Maidenhead Locator System can describe locations anywhere in the world.
Its purpose is to be concise, accurate, and robust in the face of interference and other adverse transmission conditions. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts.
