The terms de jure and de facto are used like "in principle" and "in practice" when describing political situations.
See also: List of Latin phrases
... town has a total area of 41.7 km² (16.1 mi²). 37.6 km² (14.5 mi²) of it is land and 4.1 km² (1.6 mi²) of it is water. The total area is 9.81% ...