ISO INTERNATIONAL STANDARD 5456-4 First edition 1996-06-15 Correctedandreprinted 1998-08-01 Technical drawings Projection methods - Part 4: Central projection Dessinstechniques-Methodesdeprojection- Partie4:Projectioncentrale This material is reproduced from Iso documents under International Organization for Standardization (ISo) Copyright License number IHS/ICC/1996. Not for resale. No part of these Iso documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior wrtten consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), HS or the Iso Licensor's members. [SO Reference number ISO 5456-4:1996(E) ISO5456-4:1996(E) Foreword IsO (the International Organization for Standardization) is a woridwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through isO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be rep- non-governmental, in liaison with ISO, also take part in the work. ISso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. ISO/TC 1o, Technical drawings, product definition and related documen- tation, Subcommittee Sc 1, Basic conventions. IsO 5456 consists of the following parts, under the general title Technical drawingsProjectionmethods Part 1:Synopsis Part 2: Orthographic representations Part3:Axonometricrepresentations Part 4: Central projection Annexes A and B of this part of ISO 5456 are for information only @ISO1996 microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56.CH-1211 Geneve 20. Switzerland Internet [email protected] Printed in Switzerland ii ISO ISO5456-4:1996(E) Introduction distance (projection centre) on a single projection plane (normally the drawing surface). Central projection provides excellent visual appearance of the object (monocular vision) and is often used in architectural draw- ings. ii