First-angle projection is the ISO standard and is primarily used in Europe. In third-angle projection, the parallel projectors originate as if radiated from the far side of the object and pass through the 3D object to project a 2D image onto the orthogonal plane in front of it.

This standard specifies general principles for presenting views, applicable to all kinds of technical drawings (mechanical, electrical, architectural, civil engineering, etc), following the orthographic projection methods specified in ISO 5456-2.

This drawing standards manual establishes the conventions to be adhered to by engineering and drafting personnel in the preparation, revision, and completion of engineering drawings.

Drawing more than one face of an object by rotating the object relative to your line of sight helps in understanding the 3D form. Having several views on one drawing you use the concept of multi-view projection, which is based on the orthographic (parallel) projection technique where.

ISO 128 is an international standard (ISO), about the general principles of presentation in technical drawings, specifically the graphical representation of objects on technical drawings. [1] Since 2003 the ISO 128 standard contains fifteen parts, …

This part of ISO 128 specifies the general principles for presenting views, applicable to all kinds of technical drawings (mechanical, electrical, architectural, civil engineering, etc.), following the orthographic projection methods specified in ISO 5456-2.

This Indian Standard (Part 2) which is identical with ISO 5456-2 : 1996 ‘Technical drawings — Projection methods — Part 2: Orthographic representations’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of Drawings Sectional Committee and approval of the Basic a...

hdian Standard TECHNICAL DRAWINGS — PROJECTION METHODS PART 1 SYNOPSIS 1 Scope This part of ISO 5456 gives a survey of the various types of projection methods as well as their geo-metric relationships. Parts 2 to 4 specify details for the selection and application of the various projection methods. 2 Normative references

Central projection provides excellent visual appearance of the object (monocular vision) and is often used in architectural drawings. 1 Scope This part of ISO 5456 specifies basic rules for the development and application of central projection in technical drawings.

3. DRAWING PROJECTION 3.1 Current drafting practices pertaining to multiview and sectional view draw-ings are defined and illustrated in ANSI Y 14.5M - 1994. 3.2 All drawings should be drafted using third angle projection on orthographic views. 3.3 When sections or views are projected on the same or on other sheets, they