In three-dimensional geometry, a parallel projection is a projection of an object in three-dimensional space onto a fixed plane, known as the projection plane or image plane, where the rays, known as
Optical-grinding engine model (1822), drawn in 30° isometric perspective
Detail of the original version of Along the River During the Qingming Festival attributed to Zhang Zeduan (1085–1145). Note that the picture switches back and forth between axonometric and perspective projection in different parts of the image, and is thus inconsistent.
Paul Kuniholm Mural 1924-1st-Ave-Created-2019-July-6
Oblique projection is a simple type of technical drawing of graphical projection used for producing two-dimensional images of three-dimensional objects.
Parallel projection
…It is a basic tool in descriptive geometry. The projection is called orthographic if the rays are perpendicular (orthogonal) to the image plane, and oblique or skew if they are not. A parallel projection is a particular case of projection in mathematics and graphical projection in technical drawing. Parallel…
Pieces of fortification in cavalier perspective (Cyclopaedia vol. 1, 1728).
A representative Korean painting depicting the two royal palaces, Changdeokgung and Changgyeonggung located in the east of the main palace, Gyeongbokgung.
Entrance and yard of a yamen. Detail of scroll about Suzhou by Xu Yang, ordered by the Qianlong Emperor. 18th century