ORTHOGRAPHY (from Gr. Opeoc, correct, right or straight, and yp&cbecv, to write)  , spelling which is correct according to accepted use . The word is also applied, in architecture, to the geometrical elevation of a building or of any part of one in which all the details are shown in correct relative proportion and drawn to scale . When the representation is taken through a building it is known as a section, and when portions of the structure only are drawn to a large scale they are called details .