ISO 19111:2019/Amd 2:2023

INTERNATIONAL ISO
STANDARD 19111
Third edition
2019-01
AMENDMENT 2
2023-08
Geographic information —
Referencing by coordinates
AMENDMENT 2
Information géographique — Système de références par coordonnées
AMENDEMENT 2
Reference number
ISO 19111:2019/Amd.2:2023(E)
ISO 19111:2019/Amd.2:2023(E)
© ISO 2023
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ISO 19111:2019/Amd.2:2023(E)
Foreword
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in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
287, Geographic Information, in accordance with the Agreement on technical cooperation between ISO
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ISO 19111:2019/Amd.2:2023(E)
Geographic information — Referencing by coordinates
AMENDMENT 2
3.1.16
Move the EXAMPLE to be before Note 1 to entry. At the end of the EXAMPLE, remove right parentheis
after ".and G1762." The complete revised definition becomes:
3.1.16
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.
3.1.31
Replace definition with:
3.1.31
geodetic coordinate reference system
two- or three-dimensional coordinate reference system based on a geodetic 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.

3.1.60
Replace definition with:
3.1.60
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.
ISO 19111:2019/Amd.2:2023(E)
9.3.2
After 9.3.2 list item f), add:
g) Derived projected 2D + Vertical CRS.
h) Derived projected 2D + Engineering 1D (near vertical).

9.3.4
Replace whole subclause with the following:
A spatio-parametric coordinate reference system is a compound CRS in which one component is a
geographic 2D, projected 2D, engineering 2D CRS or derived projected 2D CRS, supplemented by
a parametric CRS to create a three-dimensional CRS: an example is included in E.3.3. More than one
parametric coordinate reference system may be included if these represent independent parametric
quantities.
9.4, fourth paragraph
Insert an additional new last sentence as follows:
Associations between coordinate reference systems and coordinate operations are summarized in the
UML class diagram in Clause 12, Figure 17.

ISO 19111:2019/Amd.2:2023(E)
Figure 9
Replace Figure 9 with the following:
Figure 9 — UML diagram — Coordinate Reference Systems package

ISO 19111:2019/Amd.2:2023(E)
9.4, Table 10
Replace Table 10 with the following:
Table 10 — Defining elements of Coordinate Reference Systems::GeodeticCRS class
Definition: coordinate reference system associated with a geodetic reference frame and a three-dimensional Cartesian or
spherical coordinate system
NOTE If the geodetic reference frame is dynamic then the geodetic CRS is dynamic, else it is static.
Stereotype: Interface
Class attribute: Concrete
Inheritance from: SingleCRS
Generalization of: GeographicCRS, DerivedGeodeticCRS
Association roles: associations inherited from SingleCRS, plus:
Association Maximum
name UML identifier Association with Obligation Occurrence Association definition
Coordinate (aggregation) CoordinateSystems:: M 1 coordinate system that is a component
System coordinateSystem GeodeticCS of this geodetic coordinate reference
system
Defining (aggregation) Datums:: Geodetic O 1 geodetic reference frame that is a
Datum datum ReferenceFrame component of this geodetic coordinate
reference system
Defining Trans- definingTransformation CoordinateOperations:: O N transformation that defines this geo-
formation Transformation detic coordinate reference system
Deformation velocityModel CoordinateOperations:: O N velocity model(s) or deformation
PointMotionOperation grid(s) that may be applied to this geo-
detic coordinate reference system
Constraints: constraints inherited from SingleCRS, plus:
{coordinateSystem.ocl As Type(EllipsoidalCS) implies count(datum.ellipsoid)=1}
Remarks: The constraint enforces the requirement on geographicCRS to be associated with an ellipsoid. It is made through
the GeodeticCRS class because GeographicCRS is related to Datum and hence Ellipsoid only through its subtyp-
ing from the GeodeticCRS class. GeodeticCRSs should be associated with a Cartesian coordinate system or with
a spherical coordinate system.
Public attributes: 6 attributes (CRS name, CRS alias, CRS identifier, CRS scope, CRS validity and CRS remarks) inherited from Com-
mon Classes::IdentifiedObject and Common Classes::ObjectUsage.

ISO 19111:2019/Amd.2:2023(E)
9.4, Table 12
Replace Table 12 with the following:
Table 12 — Defining elements of Coordinate Reference Systems::VerticalCRS class
Definition: coordinate reference system having a vertical reference frame and a one-dimensional vertical coordinate sys-
tem used for recording gravity-related heights or depths; vertical CRSs make use of the direction of gravity to
define the concept of height or depth, but the relationship with gravity may not be straightforward.
NOTE 1 If the vertical reference frame is dynamic then the vertical CRS is dynamic, else it is static.
NOTE 2 Ellipsoidal heights cannot be captured in a vertical coordinate reference system. They exist only as an
inseparable part of a 3D coordinate tuple defined in a geographic 3D coordinate reference system.
Stereotype: Interface
Class attribute: Concrete
Inheritance from: SingleCRS
Generalization of: DerivedVerticalCRS
Association roles: associations inherited from SingleCRS, plus:
Association Maximum
name UML identifier Association with Obligation Occurrence Association definition
Coordinate (aggregation) CoordinateSystems:: M 1 vertical coordinate system that is a component
System coordinateSystem VerticalCS of this vertical coordinate reference system
Defining Datum (aggregation) Datums:: O 1 vertical reference frame that is a component of
datum VerticalReferenceFrame this vertical coordinate referen
...