ISO 19162:2019/Amd 1:2023

Geographic information — Well-known text representation of coordinate reference systems — Amendment 1

Information géographique — Représentation textuelle bien lisible de systèmes de référence par coordonnées — Amendement 1

Geografske informacije - Koordinatni referenčni sistemi, podani kot tekst - Dopolnilo 1

General Information

• Status: Published
• Publication Date: 07-Aug-2023
• ICS: 35.240.70 - IT applications in science
• Technical Committee: ISO/TC 211 - Geographic information/Geomatics
• Drafting Committee: ISO/TC 211 - Geographic information/Geomatics
• Current Stage: 6060 - International Standard published
• Start Date: 08-Aug-2023
• Due Date: 07-Jun-2024
• Completion Date: 08-Aug-2023
• Ref Project: SIST ISO 19162:2024/Amd 1:2024 - Geographic information - Well-known text representation of coordinate reference systems - Amendment 1

Relations

• Amends: ISO 19162:2019 - Geographic information — Well-known text representation of coordinate reference systems
• Effective Date: 03-Dec-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19162
Second edition
2019-07
AMENDMENT 1
2023-08
Geographic information — Well-
known text representation of
coordinate reference systems
AMENDMENT 1
Reference number
ISO 19162:2019/Amd.1:2023(E)
ISO 19162:2019/Amd.1:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ISO copyright office
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii
ISO 19162:2019/Amd.1:2023(E)
Foreword
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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 represented on that committee. International
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
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expressions related to conformity assessment, as well as information about ISO's adherence to
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 211, Geographic information/Geomatics,
in collaboration with the Open Geospatial Consortium (OGC).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iii
ISO 19162:2019/Amd.1:2023(E)
Geographic information — Well-known text representation
of coordinate reference systems
AMENDMENT 1
3.1.13
Replace definition with:
3.1.13
datum ensemble
group of multiple realizations of the same terrestrial or vertical reference system that, for approximate
spatial referencing purposes, are not significantly different
EXAMPLE “WGS 84” as an undifferentiated group of realizations including WGS 84 (TRANSIT), WGS 84
(G730), WGS 84 (G873), WGS 84 (G1150), WGS 84 (G1674) and WGS 84 (G1762). At the surface of the Earth these
have changed on average by 0.7 m between the TRANSIT and G730 realizations, a further 0.2 m between G730
and G873, 0.06 m between G873 and G1150, 0.2 m between G1150 and G1674 and 0.02 m between G1674 and
G1762.
Note 1 to entry: Datasets referenced to the different realizations within a datum ensemble may be merged
without coordinate transformation.
Note 2 to entry: ‘Approximate’ is for users to define but typically is in the order of under 1 decimetre but may be
up to 2 metres.
[SOURCE: ISO 19111/Amd2: 2023, 3.1.16]

3.1.14
Replace "[SOURCE: ISO 19111:2019, 3.1.8]" by "[SOURCE: ISO 19111:2019, 3.1.18]"

3.1.15
Replace "[SOURCE: ISO 19111:2019, 3.1.9]" by "[SOURCE: ISO 19111:2019, 3.1.19]"

3.1.25
Replace definition with:
3.1.25
geodetic coordinate reference system
two- or three-dimensional coordinate reference system based on a geodetic datum reference frame and
having either a three-dimensional Cartesian or an ellipsoidal or a spherical coordinate system
Note 1 to entry: In this document a coordinate reference system based on a geodetic reference frame and having
an ellipsoidal coordinate system is geographic.
[SOURCE: ISO 19111/Amd2: 2023, 3.1.31]

ISO 19162:2019/Amd.1:2023(E)
3.1.45
Replace definition with:
3.1.45
spherical coordinate system
two- or three-dimensional coordinate system in Euclidean space in which position is specified by two
angular coordinates and (in the three-dimensional case) one distance coordinate
Note 1 to entry: Not to be confused with an ellipsoidal coordinate system based on an ellipsoid ‘degenerated’ into
a sphere.
[SOURCE: ISO 19111/Amd2: 2023, 3.1.60]

3.2
In the entry for EPSG, replace www .epsg -registry .org with https:// epsg .org.

6.3.1
Insert the following in the row above :
::= @ !! ISO/IEC 10646:2012 character identifier U+0040

6.3.4
Replace with the following:
::= |
| |
| | | |
| |
| |
|
| | | |
| | | |
| | | | |
| | | |
| | |

6.6
Insert the following in the row above angleUnit:
anchorEpoch 8 and 10
Insert the following in the two rows above baseEngCRS:
ISO 19162:2019/Amd.1:2023(E)
axisMaxValue 7
axisMinValue 7
Insert the following in the row above derivedProjCRS:
definingTransformation 8
Insert the following in the row above remark:
rangeMeaning 7

7.5.1
Replace rows for spatial axis, temporalCountMeasure axis and ordinal-dateTime axis with the following:
::=

[ ]
[ ]
[ ]
[ { } ]…
!! Axis unit and conversion factor mandatory. See 7.5.6.2.
::=

[ ]
[ ]
[ ]
[ { } ]…
!! Axis unit mandatory, conversion factor conditional. See
7.5.6.4
::=

[ ]
[ ]
[ { } ]…
!! The attribute 'axis unit' is not required for an ordinal coor-
dinate system or for a temporal dateTime coordinate system.
See 7.5.6.3.
Insert seven new rows between and :
ISO 19162:2019/Amd.1:2023(E)
::= |
| { axis minimum value> }
| { axis minimum value>
}
::=

::= AXISMINVALUE
::= < axis maximum value keyword> ber>

::= AXISMAXVALUE
::=
{ exact | wraparound } ]
::= RANGEMEANING

7.5.2, Table 3
Replace Table 3 with the following:
Table 3 — Permitted coordinate system type, dimension and coordinate data type by CRS
Dimension Coordinate
CRS type Permitted CS type(s)
(number of axes) data type
Cartesian 3
geodetic
spherical 2 or 3
derived geodetic
(ellipsoidal - read only: see 8.3) (2 or 3)
geographic
ellipsoidal 2 or 3
derived geographic
projected Cartesian 2 or 3
affine 2 or 3 (no constraint)
Cartesian 2 or 3 (no constraint)
cylindrical 3 (no constraint)
derived projected
ordinal 1 or 2 or 3 integer
polar 2 (no constraint)
spherical 2 or 3 (no constraint)
vertical
vertical 1
derived vertical
affine 2 or 3 (no constraint)
Cartesian 2 or 3 (no constraint)
cylindrical 3 (no constraint)
engineering
linear 1 (no constraint)
derived engineering
ordinal 1 or 2 or 3 integer
polar 2 (no constraint)
spherical 2 or 3 (no constraint)
parametric
parametric 1
derived parametric
ISO 19162:2019/Amd.1:2023(E)
TTabablele 3 3 ((ccoonnttiinnueuedd))
Dimension Coordinate
CRS type Permitted CS type(s)
(number of axes) data type
temporalDateTime 1 dateTime
temporal
temporalCount 1 integer
derived temporal
temporalMeasure 1 real
7.5.6.1
Remove last paragraph (" or may also specify the unit for implied map projection
parameter values, as described in 9.3.").

7.5
Insert the following text as a new subclause 7.5.7. Renumber the original subclause 7.5.7 as 7.5.8 and
renumber the subsequent subclauses as 7.5.8.1, 7.5.8.2, 7.5.8.3, 7.5.8.4 and 7.5.8.5, respectively.

7.5.7  Axis range
An axis may have optional attributes minimumValue, maximumValue and rangeMeaning. minimumValue
and maxiumValue describe the minimum and maximum values normally allowed for this axis, in the unit
for the axis. rangeMeaning indicates whether the axis value range specified through minimumValue and
maximumValue allows 'wrap-around', for example longitudes modulus 360°. It may only be included
when both minimumValue and maximumValue are included in the axis description, and then it is an
optional attribute.
7.5.7.1 (7.5.8.1 following insertion of new subclause 7.5.7)
Insert a fourth example as follows:
EXAMPLE 4 2D Geocentric CS. Axis order is implied, is used, axes have name and abbreviation.
CS[spherical,2],
AXIS["geocentric latitude (U)",north],
AXIS["geocentric longitude (V)",east],
ANGLEUNIT["degree",0.0174532925199433]

7.5.7.5 (7.5.8.5 following insertion of new subclause 7.5.7)
Insert the following text as a new subclause 7.5.8.6:
7.5.8.6  Coordinate systems with axis range constraint
EXAMPLE 1 3D spherical CS with longitude range constrained to be 0 through 360°. Axis order is explicit,
is used, first two axes have name but no abbreviation.
ISO 19162:2019/Amd.1:2023(E)
CS[spherical,3],
AXIS["latitude",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],
AXIS["longitude",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433],
AXISMINVALUE[0],AXISMAXVALUE[360]],
AXIS["ellipsoidal height (h)",up,ORDER[3],LENGTHUNIT["metre",1.0]]

8.1
Replace definitions of , , and
with the following:
::=

{ | }

[ ].

::=



[ ].

::=

{ | }

[ ].

::=



[ ].

Insert three rows after as follows:
ISO 19162:2019/Amd.1:2023(E)
::=

[ ]
!! This information identifies the transformation that may define
a geodetic CRS. A full description may be given separately; see
Clause 17. A full description of the defining transformation shall not
be embedded within the geodetic CRS WKT.
keyword>
                 !! See 7.2
name>
8.2.3
Add the following text at the end of the second paragraph:
A dynamic reference frame may have a reference frame derived from it at a specified epoch. This epoch
may be included in the description of the derived reference frame using datum anchor epoch. This is
not to be confused with the epoch at which a static reference frame is aligned w
...