Technical Graphics - Projection Systems - Orthographic
3rd Angle Projection
3rd Angle Orthographic Projection is used
mostly in the United States but it is also very useful to
know in this part of the world, especially with the
improvements in communication.
Now if we remove the external panes of "glass"
we are left with the vertical and horizontal planes between
us and the object.
So now you have the 3rd Angle Orthographic
Projection of the object.
Section 1 : This Lesson shows you the imaginary Glass Box and then goes onto First Angle Projection.
Section 2 : This Lesson shows Third Angle Projection.
Section 3 : This Lesson shows you how to determine wheather you are working in First or Third Angle Projection.
Section 4 : In this Lesson you get to put all of your newly acquired knowledge to the test with a wide variety of problems and question relating to Orthographic Projection.