SIST ISO 19162:2017
Geographic information -- Well-known text representation of coordinate reference systems
Geographic information -- Well-known text representation of coordinate reference systems
This International Standard defines the structure and content of a text string implementation of the abstract
model for coordinate reference systems described in ISO 19111:2007 and ISO 19111-2:2009. The string
defines frequently needed types of coordinate reference systems and coordinate operations in a selfcontained
form that is easily readable by machines and by humans. The essence is its simplicity; as a
consequence there are some constraints upon the more open content allowed in ISO 19111:2007. To retain
simplicity in the well-known text (WKT) description of coordinate reference systems and coordinate operations,
the scope of this International Standard excludes parameter grouping and pass-through coordinate operations.
The text string provides a means for humans and machines to correctly and unambiguously interpret and
utilise a coordinate reference system definition with look-ups or cross references only to define coordinate
operation mathematics. Because it omits metadata about the source of the data and may omit metadata about
the applicability of the information, the WKT string is not suitable for the storage of definitions of coordinate
reference systems or coordinate operations.
Information géographique -- Représentation textuelle bien lisible de systèmes de référence par coordonnées
Geografske informacije - Koordinatni referenčni sistemi, podani kot tekst
Ta mednarodni standard določa strukturo in vsebino implementacije besedilnih nizov abstraktnega modela za koordinatne referenčne sisteme, opisane v standardih ISO 19111:2007 in ISO 19111-2:2009. Niz določa pogosto potrebne vrste koordinatnih referenčnih sistemov in koordinatnih operacij v samostojni obliki, ki jo stroji in ljudje zlahka preberejo. Bistvo je njegova preprostost; posledično za bolj odprto vsebino, ki jo omogoča standard ISO 19111:2007, veljajo nekatere omejitve. Za ohranjanje preprostosti opisa koordinatnih referenčnih sistemov in koordinatnih operacij, podanih kot besedilo (WKT), področje uporabe tega standarda ne vključuje razvrščanja parametrov in prehodnih koordinatnih operacij.
Besedilni niz omogoča ljudem in strojem pravilno in nedvoumno interpretacijo in uporabo definicije koordinatnega referenčnega sistema s poizvedbami ali sklici samo za opredelitev matematike koordinatnih operacij. Ker izpušča metapodatke o viru podatkov in morda izpušča metapodatke o uporabnosti informacij, niz WKT ni primeren za shranjevanje definicij koordinatnih referenčnih sistemov ali koordinatnih operacij.
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 19162
First edition
2015-08-15
Geographic information — Well-
known text representation of
coordinate reference systems
Information géographique — Représentation textuelle bien lisible de
systèmes de référence par coordonnées
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
Contents Page
Foreword . vii
Introduction . viii
1 Scope . 1
2 Conformance requirements . 1
3 Normative references . 2
4 Definitions and abbreviations . 2
4.1 Definitions . 2
4.2 Abbreviations . 8
5 Backus-Naur Form notation and syntax . 8
6 WKT string form . 9
6.1 Overview . 9
6.2 Encoding . 9
6.3 Characters used in WKT . 9
6.3.1 Basic characters . 9
6.3.2 Numbers . 11
6.3.3 Date and time . 11
6.3.4 CRS WKT characters . 12
6.3.5 Double quote . 13
6.4 Delimiter . 13
6.5 Case sensitivity . 13
6.6 Reserved keywords . 13
6.7 Backward compatibility . 15
7 WKT representation of common attributes . 15
7.1 Introduction . 15
7.2 Name . 15
7.3 Scope, extent, identifier and remark . 15
7.3.1 Introduction . 15
7.3.2 Scope . 16
7.3.3 Extent . 16
7.3.4 Identifier . 18
7.3.5 Remark. 19
7.4 Unit and unit conversion factor . 20
7.5 Coordinate system . 21
7.5.1 Syntax . 21
7.5.2 Coordinate system type and dimension . 22
7.5.3 Axis name and abbreviation . 23
7.5.4 Axis direction . 24
7.5.5 Axis order . 25
7.5.6 Axis unit and coordinate system unit . 25
7.5.7 Examples of WKT describing coordinate systems . 26
8 WKT representation of geodetic coordinate reference systems . 28
8.1 Overview . 28
8.2 Geodetic datum . 28
8.2.1 Ellipsoid . 28
8.2.2 Prime meridian . 29
8.2.3 Datum . 30
8.3 Coordinate systems for geodetic CRSs . 31
8.4 Examples of WKT describing a geodetic CRS . 31
9 WKT representation of projected CRSs .32
9.1 Overview .32
9.2 Base CRS .32
9.2.1 General .32
9.2.2 Ellipsoidal CS unit .33
9.3 Map projection .33
9.3.1 Introduction .33
9.3.2 Map projection name and identifier .34
9.3.3 Map projection method .34
9.3.4 Map projection parameter .35
9.4 Coordinate systems for projected CRSs .35
9.5 Examples of WKT describing a projected CRS .35
10 WKT representation of vertical CRSs .36
10.1 Overview .36
10.2 Vertical datum .37
10.3 Vertical coordinate system .37
10.4 Example of WKT describing a vertical CRS .37
11 WKT representation of engineering CRSs .37
11.1 Overview .37
11.2 Engineering datum .38
11.3 Coordinate systems for engineering CRSs .38
11.4 Examples of WKT describing an engineering CRS .38
12 WKT representation of image CRSs .39
12.1 Overview .39
12.2 Image datum .39
12.3 Coordinate systems for image CRSs.40
13 WKT representation of parametric CRSs .40
13.1 Overview .40
13.2 Parametric datum.40
13.3 Parametric coordinate system .40
13.4 Example of WKT describing a parametric CRS .41
14 WKT representation of temporal CRSs .41
14.1 Overview .41
14.2 Temporal datum .41
14.3 Temporal coordinate system .41
14.4 Example of WKT describing a temporal CRS .41
15 WKT representation of derived CRSs .42
15.1 Overview .42
15.2 Derived CRS conversion .42
15.2.1 Introduction .42
15.2.2 Derived CRS conversion method .43
15.2.3 Derived CRS conversion parameter .43
15.2.4 Derived CRS conversion parameter file .4
...
SLOVENSKI STANDARD
01-junij-2017
*HRJUDIVNHLQIRUPDFLMH.RRUGLQDWQLUHIHUHQþQLVLVWHPLSRGDQLNRWWHNVW
Geographic information -- Well-known text representation of coordinate reference
systems
Information géographique -- Représentation textuelle bien lisible de systèmes de
référence par coordonnées
Ta slovenski standard je istoveten z: ISO 19162:2015
ICS:
07.040 Astronomija. Geodezija. Astronomy. Geodesy.
Geografija Geography
35.240.70 Uporabniške rešitve IT v IT applications in science
znanosti
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 19162
First edition
2015-08-15
Geographic information — Well-
known text representation of
coordinate reference systems
Information géographique — Représentation textuelle bien lisible de
systèmes de référence par coordonnées
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
Contents Page
Foreword . vii
Introduction . viii
1 Scope . 1
2 Conformance requirements . 1
3 Normative references . 2
4 Definitions and abbreviations . 2
4.1 Definitions . 2
4.2 Abbreviations . 8
5 Backus-Naur Form notation and syntax . 8
6 WKT string form . 9
6.1 Overview . 9
6.2 Encoding . 9
6.3 Characters used in WKT . 9
6.3.1 Basic characters . 9
6.3.2 Numbers . 11
6.3.3 Date and time . 11
6.3.4 CRS WKT characters . 12
6.3.5 Double quote . 13
6.4 Delimiter . 13
6.5 Case sensitivity . 13
6.6 Reserved keywords . 13
6.7 Backward compatibility . 15
7 WKT representation of common attributes . 15
7.1 Introduction . 15
7.2 Name . 15
7.3 Scope, extent, identifier and remark . 15
7.3.1 Introduction . 15
7.3.2 Scope . 16
7.3.3 Extent . 16
7.3.4 Identifier . 18
7.3.5 Remark. 19
7.4 Unit and unit conversion factor . 20
7.5 Coordinate system . 21
7.5.1 Syntax . 21
7.5.2 Coordinate system type and dimension . 22
7.5.3 Axis name and abbreviation . 23
7.5.4 Axis direction . 24
7.5.5 Axis order . 25
7.5.6 Axis unit and coordinate system unit . 25
7.5.7 Examples of WKT describing coordinate systems . 26
8 WKT representation of geodetic coordinate reference systems . 28
8.1 Overview . 28
8.2 Geodetic datum . 28
8.2.1 Ellipsoid . 28
8.2.2 Prime meridian . 29
8.2.3 Datum . 30
8.3 Coordinate systems for geodetic CRSs . 31
8.4 Examples of WKT describing a geodetic CRS . 31
9 WKT representation of projected CRSs .32
9.1 Overview .32
9.2 Base CRS .32
9.2.1 General .32
9.2.2 Ellipsoidal CS unit .33
9.3 Map projection .33
9.3.1 Introduction .33
9.3.2 Map projection name and identifier .34
9.3.3 Map projection method .34
9.3.4 Map projection parameter .35
9.4 Coordinate systems for projected CRSs .35
9.5 Examples of WKT describing a projected CRS .35
10 WKT representation of vertical CRSs .36
10.1 Overview .36
10.2 Vertical datum .37
10.3 Vertical coordinate system .37
10.4 Example of WKT describing a vertical CRS .37
11 WKT representation of engineering CRSs .37
11.1 Overview .37
11.2 Engineering datum .38
11.3 Coordinate systems for engineering CRSs .38
11.4 Examples of WKT describing an engineering CRS .38
12 WKT representation of image CRSs .39
12.1 Overview .39
12.2 Image datum .39
12.3 Coordinate systems for image CRSs.40
13 WKT representation of parametric CRSs .40
13.1 Overview .40
13.2 Parametric datum.40
13.3 Parametric coordinate system .40
13.4 Example of WKT describing a parametric CRS .41
14 WKT representation of temporal CRSs .41
14.1 Overview .41
14.2 Temporal datum .41
14.3 Temporal coordinate system .41
14.4 Example of WKT describing a temporal CRS .41
15 WKT representation of derived CRSs .42
15.1 O
...
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