What is used as the center of the US for mapping and survey results?

Lebanon Kansas is the center but for mapping I am not sure how they do that.|||Lebanon, Kansas is considered the geographical center of the continental United States.|||I don%26#039;t believe that any point is used for the center of the States for doing mapping and surveying. I think those things are always based off of worldwide latitude and longitude lines. Thats why when you see a map or survey results it always in degrees, minutes.