1. plan view: a view obtained by orthogonal projection from above an object. Also known as the top view.

2. Sectional view: the legend of the internal structure displayed according to a certain cutting direction of the related figure. A cross-sectional view is a projection in which the remaining part is orthographically projected to the projection plane by cutting the object with the cutting plane and removing the part between the observer and the cutting plane.

3. The view seen from the front to the back of the object is called the main view. The view from the front to the back of an object is called the main view-it can reflect the shape of the front of the object.

Extended data

Architectural construction drawing is a drawing used to express the planning position, external modeling, internal layout, internal and external decoration, detailed structure, fixed facilities and structural requirements of a house. Including construction drawing home page, general plan, plan, elevation, section and detail.

The drawing of construction drawing is a comprehensive application of projection theory, graphic method and related professional knowledge. Master the principle of projection drawing and various representations of shapes. Familiar with the meanings of legends, symbols, lines, dimensions and proportions commonly used in construction drawings.

Because of the variety of buildings' structures, fittings and materials, for the sake of simplicity, the national standard stipulates a series of graphic symbols to represent building components, sanitary equipment and building materials. This graphic symbol is called legend. In order to facilitate the reading of drawings, the national standard also stipulates many marking symbols.

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