Abstract: A method for transforming spatial data includes displaying a first graphical representation that represents spatial data formatted in a first coordinate system and displaying a second graphical representation that represents spatial data formatted in a second coordinate system. The data represented by the first graphical representation is transformed into the second coordinate system in response to the first graphical representation being dragged and dropped onto the second graphical representation. In another aspect, a computer-readable medium contains instructions for controlling a computer system to perform a method of transforming spatial data.