# Views projections

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Obtaining the Views of an Object - main view is called an object, the orthogonal projections of the same on 6 planes, arranged in a cube. "We can also define views as the orthogonal projections of an object, according to the different directions from where you look. Title of the Views - If we place an observer according to the six directions indicated by the arrows, we get six possible views of an object .

View A: front view or elevation
View B: Top view or plant
Vista C: right or right lateral view
Vista D: left or left lateral view
Vista E: Bottom view
Vista F: Rear view

Relative positions of the view - for the provision of different views on paper, you can use two orthogonal projection variants of the same importance:
The method of projecting the first dihedral, also called the European (ISO E)
The third method of projecting the dihedral, also called American (ISO A)
European System (ISO E)
It is used in almost every country of the world, this system is based on the projections of the body is made in the first dihedral planes which is opaque.
The elements constituting the projection are formed by the source, body and projection plane (the unit of measurement is mm).
European System (ISO E)
It is used in almost every country of the world, this system is based on the projections of the body is made in the first dihedral planes which is opaque.
The elements constituting the projection are formed by the source, body and projection plane (the unit of measurement is mm).
American System (ISO A)
This projection is based on considering the body in the third dihedral which is the transparent and flat elements of this projection are formed as a focus, projection plane and body (the measurement unit is the inch).

Projections can be defined as a projection figure that results from projecting, on a flat surface, all points on the boundary of a solid or another figure. It has three key elements:
- Center of projection. -Plane projection. - Lines of projection.
Different types of projections:
Conics: The center of projection has a fixed position and determined.
Cylindrical: The center of projection is at infinity. The cylindrical projection may be:
Orthogonal: projecting rays form an angle of 90 degrees with the plane projecting
Oblique rays projecting at an angle other than 90 degrees to the plane of projection
Diédrico System
It is the precursor of all systems and the wider field of applications, especially in industry and civil works. It is also the most widespread of all known dual-projection system, or Monge, this being the first French geometer who compiled it. It is a system of orthogonal cylindrical projections, ie that it is used only the orthogonal projection. This type of projection is the most commonly used in Technical Drawing.
It maintained relations of parallelism and in those dimensions that are parallel to the axes, also remain proportionality true shape and true scale.
In the System Diédrico projections are made on planes perpendicular projection (horizontal and vertical plane) dividing the space into four quadrants as shown in the figure below.