Scaling can be defined as the determination of the interdependency of variables in a physical system. It involves a combination of dimensional analysis and physical reasoning, and typically requires a good deal of physical intuition. It can, however, be used to great advantage in solving otherwise intractable problems.
In computer graphics, scaling refers to altering the size of a sprite to make the sprite appear nearer or farther from the player's point of view.
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For example, for a scale model of an object, the ratio of corresponding lengths is a dimensionless scale, e.g.
Correspondingly, torques could be represented on the same map by areas in a scale of 1 m² : 12 500 Nm, which is equal to 1 m : 12 500 N. Torques in the plane of the map could be represented by arrows with an independent scale of e.g.
a map of scale 1:50,000 shows a distance of 50,000 cm (=500 m) as 1 cm on a map, and a model on a scale 1:25 of a building with a height of 30 m has a model height of 1.20 m.
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