A model that represents the elements. Or the property of any one thing, like using his line edges (contours line) represents the height above sea level of the area.
As the model elements or properties of something, such as using his border pattern (line contours), instead of the height from the sea level of the area.
instead of using the model as a component, or property of any one of the things such as the Use lining the edge of the he (contours line) instead of high from the sea.