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Isometric projection is a method for visually representing three-dimensional objects in two dimensions in technical and engineering drawings. It is an axonometric projection in which the three coordinate axes appear equally foreshortened and the angle between any two of them is 120 degrees.
Abbreviations and acronyms for use on drawings and related documents Y14.4M–1989: Pictorial drawing Y14.41–2003: Digital product definition data practices Y14.42–2002: Digital approval systems Y14.5–2018: Dimensioning and tolerancing Y14.5.1M–1994: Mathematical definition of dimensioning and tolerancing principles Y14.6–2001
An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing.
In isometric projection, the most commonly used form of axonometric projection in engineering drawing, [4] the direction of viewing is such that the three axes of space appear equally foreshortened, and there is a common angle of 120° between them. As the distortion caused by foreshortening is uniform, the proportionality between lengths is ...
Comparison of several types of graphical projection, including elevation and plan views. To render each such picture, a ray of sight (also called a projection line, projection ray or line of sight) towards the object is chosen, which determines on the object various points of interest (for instance, the points that are visible when looking at the object along the ray of sight); those points of ...
Some 3D shapes in isometric projection: Image title: A cube, cylinder, sphere, pyramid and cone in isometric projection, by CMG Lee. Black labels denote dimensions of the 3D object, while red labels denote dimensions of the 2D projection (drawing). Width: 100%: Height: 100%
Because pictorial projections innately contain this distortion, in instrument drawings of pictorials great liberties may then be taken for economy of effort and best effect. [ clarification needed ] Axonometric projection is further subdivided into three categories: isometric projection , dimetric projection , and trimetric projection ...
Surveyors use a range of equipment including tapes, plane tables, total stations, 3D scanners, GPS and GIS to produce illustrations including plans, sections and elevations as well as isometric and axonometric illustrations which are regularly used in building recording.