ANSI ISO 6709-1983 Standard representation of latitude longitude and altitude for geographic point locations Adopted by INCITS《INCITS采纳的使用坐标定位地理位置的标准表示法》.pdf
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1、International Standard 6709 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEYHAPOAHAR OPAHH3AUWR flOCTAl4 s Price based on 3 pages Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard.Date of ANSI Approval: 1/13/99Published by American Na
2、tional Standards Institute,25 West 43rd Street, New York, New York 10036Copyright 2002 by Information Technology Industry Council (ITI).All rights reserved.These materials are subject to copyright claims of International Standardization Organization (ISO), InternationalElectrotechnical Commission (I
3、EC), American National Standards Institute (ANSI), and Information Technology Industry Council(ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, withoutthe prior written permission of ITI. All requests pertaining to this standa
4、rd should be submitted to ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaCopyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Foreword IS0 (the In
5、ternational Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been
6、 authorized has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before th
7、eir acceptance as International Standards by the IS0 Council. International Standard IS0 6769 was developed by Technical Committee ISO/TC 97, Information processing systems, and was circulated to the member bodies in November 1961. It has been approved by the member bodies of the following countries
8、 : Belgium France Canada Germany, F. R. China Italy Czechoslovakia Japan Egypt, Arab Rep. of Netherlands Finland Poland Romania South Africa, Rep. of Spain Sweden United Kingdom USA No member body expressed disapproval of the document. 0 International Organization for Standardization, 1983 0 Printed
9、 in Switzerland Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD IS0 6709-1983 (E) Standard representation of latitude, longitude and altitude for geographi
10、c point locations 0 Introduction Efficient interchange of geographic point location data requires formats which are universally interpretable and which allow unique identification of points on, above or below the earths surface. Users in various disciplines may have different re- quirements. This is
11、 exemplified by the use of degrees and decimal degrees in addition to the traditional degrees, minutes and seconds for recording latitude and longitude. Users may also require different degrees of precision and may use latitude and longitude without altitude. This International Standard provides a v
12、ariable-length format which has the flexibility to cover these various requirements. Use of this International Standard will : a) reduce the cost of interchange of data; b) reduce the delay in converting non-standard coding structures in preparation for interchange by providing ad- vance knowledge o
13、f the standard interchange format. 1 Scope and field of application This International Standard specifies a variable-length format for the representation of latitude, longitude and altitude for use in data interchange. The representation of altitude is optional and its presence or absence is implici
14、t in the format. This International Standard allows the use of normal sex- agesimal notations involving degrees, minutes and seconds as well as various combinations of sexagesimal and decimal nota- tions - degrees and decimal degrees; degrees, minutes and decimal minutes; degrees, minutes, seconds a
15、nd decimal seconds. It makes use of the numeric characters 0 to 9, the graphic characters plus ( + 1, minus ( - 1, full stop (.I and com- ma (,I. This International Standard does not specify the use of fixed- length field formats which, although they may be consistent with the format in this Interna
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