annotation explanatory notes added to a drawing
TRANSCRIPT
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ANNOTATIONExplanatory notes added to a drawing.
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CENTERLINE
A line type that is used to indicate the axis of symmetry for a part or feature.
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CONSTRUCTION LINE
Thin lines that serve as guides while sketching or drawing.
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DEPTH
The distance from front to back.
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DIAMETER
A straight line passing from side to side through the center of a circle or sphere.
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DIMENSION
A measurable extent, such as the three principal dimensions of an object of width, height, and depth.
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DIMENSION LINE
Thin lines capped with arrowheads, which may be broken along their length to provide space for the dimension numerals.
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EXTENSION LINE
A thin solid line perpendicular to a dimension line, indicating which feature is associated with the dimension.
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HEIGHT
The measurement of someone or something from head to foot or from base to top.
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HIDDEN LINE
A line type that represents an edge that is not directly visible because it is behind or beneath another surface.
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ISOMETRIC
A form of pictorial drawing in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
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LEADER LINE
Lines that are thin and used to connect a specific note to a feature.
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LINE CONVENTIONS
Standardization of lines used on technical drawings by line weight and style.
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LINE WEIGHT
Also called line width. The thickness of a line, characterized as thick or thin.
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LOCATION DIMENSION
Dimensions that show the exact location of parts of an object.The measurement or extent of something from side to side.
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OBJECT LINE
A heavy solid line used on a drawing to represent the outline of an object.
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ONE-POINT PERSPECTIVE
A method of realistic drawing in which the part of an object closest to the viewer is a planar face, and all the lines describing sides perpendicular to that face can be extended back to converge at one point, the vanishing point
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ORTHOGRAPHIC PROJECTION
A method of representing three-dimensional objects on a plane having only length and breadth.
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PERSPECTIVE DRAWING
A form of pictorial drawing in which vanishing points are used to provide the depth and distortion that is seen with the human eye.
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PLANE
A flat surface on which a straight line joining any two points would wholly lie.
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RADIUS
A straight line from the center to the circumference of a circle or sphere.
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SCALE
A proportion between two sets of dimensions used in developing accurate, larger or smaller prototypes, or models of design ideas.
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SIZE DIMENSION
Placed directly on a feature to identify a specific size or may be connected to a feature in the form of a note.
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SKETCH
A rough drawing representing the main features of an object or scene and often made as a preliminary study.
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THREE DIMENSIONAL (3D)
the dimensions of height, width, and depth.
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THUMBNAIL SKETCH
A preliminary visual of a possible idea for a design. Most thumbnail sketches are not full-size and have little detail. They are intended to quickly explore possible alternative designs.
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TWO DIMENSIONAL (2D)
Having the dimensions of height and width, height and depth, or width and depth only.
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TWO-POINT PERSPECTIVE
A realistic way of drawing objects in three dimensions using a horizon line, a key edge, and two vanishing points.
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VANISHING POINT
A point in space, usually located on the horizon, where parallel edges of an object appear to converge.
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VIEWS
Views is shorthand for multiview projection, which is a system used to view an object. The six mutually perpendicular directions any object may be viewed are top, front, right-side, rear, left-side, and bottom. Top, front, and right-side views are also referred to as the three regular views because they are the three views most frequently used.
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VISUALIZE
To imagine the visual form of an object or situation that one cannot see.
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WIDTH
The measurement or extent of something from side to side