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Oblique projection is a type of parallel projection: it projects an image by intersecting parallel rays (projectors) from the three-dimensional source object with the drawing surface (projection plane). In both oblique projection and orthographic projection, parallel lines of the source object produce parallel lines in the projected image. The ...
Whereas calculating the fitted value of an ordinary least squares regression requires an orthogonal projection, calculating the fitted value of an instrumental variables regression requires an oblique projection. A projection is defined by its kernel and the basis vectors used to characterize its range (which is a complement of the kernel).
Classification of Axonometric projection and some 3D projections "Axonometry" means "to measure along the axes". In German literature, axonometry is based on Pohlke's theorem, such that the scope of axonometric projection could encompass every type of parallel projection, including not only orthographic projection (and multiview projection), but also oblique projection.
In oblique projections the parallel projection rays are not perpendicular to the viewing plane as with orthographic projection, but strike the projection plane at an angle other than ninety degrees. In both orthographic and oblique projection, parallel lines in space appear parallel on the projected image.
Orthographic projection (also orthogonal projection and analemma) [a] is a means of representing three-dimensional objects in two dimensions.Orthographic projection is a form of parallel projection in which all the projection lines are orthogonal to the projection plane, [2] resulting in every plane of the scene appearing in affine transformation on the viewing surface.
An oblique combination of the sinusoidal and Mollweide projections. 1906 Eckert II: Pseudocylindrical Equal-area Max Eckert-Greifendorff: 1906 Eckert IV: Pseudocylindrical Equal-area Max Eckert-Greifendorff: Parallels are unequal in spacing and scale; outer meridians are semicircles; other meridians are semiellipses. 1906 Eckert VI ...
An oblique cylindrical projection aligns with a great circle, but not the equator and not a meridian. Pseudocylindrical A sinusoidal projection shows relative sizes ...
Among parallel projections, orthographic projections are seen as the most realistic, and are commonly used by engineers. On the other hand, certain types of oblique projections (for instance cavalier projection, military projection) are very simple to implement, and are used to create quick and informal pictorials of objects.