TYPES OF PLANS OF THE ORTHOGONAL PROJECTION.
-. ANY PLAN: given by its traces. 
-. MAP SONG: perpendicular to the vertical plane of projection, and the horizontal plane at an angle either.
-. Horizontal plane parallel to the horizontal plane of projection and perpendicular to the vertical plane of projection. -. 
MAP PIE. Perpendicular to the plane horizontal projection and vertical projection plane at an angle either. -. 
Frontal plane: parallel to the vertical plane of projection and perpendicular to the horizontal plane of projection. -. 
MAP PROFILE: parallel to the plane side of projection and perpendicular to the vertical and horizontal projection. -. 
FLAT LINE PARALLEL TO THE GROUND: is oblique to the vertical and horizontal projection and their traces are parallel to the ground line and is perpendicular to the plane side of projection. 
axonometric projection.
These projections have the advantage of the orthogonal projections as well as accurate and artistic perspective, clearly and quickly give a full picture of the object they represent and also the possibility to directly determine its size, thanks to a simple rule of interpretation of object which shows the object in three dimensions: height width and depth.
This procedure is based on a combination of three axes of direction, intersecting angles to each other, forming a rectangle trihedral angle, these three axes are the directions of width, length and height, from a certain point. The dimensions of the object that we represent are placed on guidelines. TYPES
axonometric projection.
1 -. According to the reduction coefficient: -.
ISOMETRIC: If the scales for the three axes are equal, have the same inclination, which is 120 degrees, and three dimensions are the same too. the axis ratio is: OX = 1; OY = 1; OZ = 1.
-. Dimetra: If only two of the axes are the same distance and the third is different. the axis ratio is: OX = 1; OY = ½; OZ = 1.
-. Trimetric: In the event that the axes form three angles unequal, treated with three different scales. the relationship of axis is: OX = 5 / 7; OY = 3 / 7; OZ = 1.
2 -. According to the angles formed by the axes with respect to the ground line: -. 60 - 30: axes (X, Y) form an angle of 60 º and 30 º respectively. -.
30 - 30: axes (X, Y) form an angle of 30 º and 30 º respectively. -.
45 - 30: axes (X, Y) form an angle of 60 º and 30 º respectively.
NOTE: For the three cases, the actions of the object is placed on the axles without any reducción.Los cases 60 º - 30 º and 45 º - 30 º, are most desirable. PROJECTION OF SOLIDS USING THE GLASS BOX.
Suppose we want to draw a body inside a transparent cube, where its outline is projected on the walls without distortion of the cube.
Suppose we want to draw a body inside a transparent cube, where its outline is projected on the walls without distortion of the cube.
Each of these projections of the object on different sides of the cube will be a view of the object, which are: FRONT: view obtained when observing the object from the front (A).
TOP VIEW: A view obtained when the object is observed above (B).
LEFT SIDE VIEW: A view obtained when observing the object by the side facing to the left of the starting position of the observer (C).
RIGHT SIDE VIEW: A view obtained when observing the subject's face to the right of the starting position of the observer (D).
BOTTOM: view obtained when observing the object below (E).
REAR VIEW: A view obtained when observing the object back (F).
VIEW: is the orthogonal projection of a body on a plane behind it with respect to the observer. 
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