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BS ISO 19162:2019

BS ISO 19162:2019

$215.11

Geographic information. Well-known text representation of coordinate reference systems

Published By Publication Date Number of Pages
BSI 2019 124
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This document defines the structure and content of a text string implementation of the abstract model for coordinate reference systems described in ISO 19111. The string defines frequently needed types of coordinate reference systems and coordinate operations in a self-contained 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. To retain simplicity in the well-known text (WKT) description of coordinate reference systems and coordinate operations, the scope of this document 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. A WKT string is not suitable for the storage of definitions of coordinate reference systems or coordinate operations because it omits metadata about the source of the data and may omit metadata about the applicability of the information.

PDF Catalog

PDF Pages PDF Title
2 National foreword
8 Foreword
9 Introduction
10 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
19 3.2 Abbreviated terms
4 Conformance requirements
20 5 Backus-Naur Form notation and syntax
21 6 WKT string form
6.1 Overview
6.2 Encoding
6.3 Characters used in WKT
6.3.1 Basic characters
22 6.3.2 Numbers
23 6.3.3 Date and time
24 6.3.4 CRS WKT characters
6.3.5 Double quote
6.4 Delimiter
25 6.5 Case sensitivity
6.6 Reserved keywords
27 6.7 Backward compatibility
7 WKT representation of common attributes
7.1 General
7.2 Name
28 7.3 Scope, extent, identifier and remark
7.3.1 General
7.3.2 Usage (scope and extent)
31 7.3.3 Identifier
32 7.3.4 Remark
33 7.4 Unit and unit conversion factor
7.4.1 Unit description
34 7.4.2 Conversion factor — Spatial and parametric units
7.4.3 Conversion factor — Temporal quantities
35 7.4.4 Default unit
7.5 Coordinate system
7.5.1 Syntax
38 7.5.2 Coordinate system type, dimension and coordinate data type
7.5.3 Axis name and abbreviation
39 7.5.4 Axis direction
40 7.5.5 Axis order
41 7.5.6 Axis unit and coordinate system unit
42 7.5.7 Examples of WKT describing coordinate systems
43 7.6 Datum ensemble
45 7.7 Dynamic coordinate reference systems
46 8 WKT representation of geodetic and geographic coordinate reference systems
8.1 Overview
47 8.2 Geodetic reference frame (geodetic datum)
8.2.1 Ellipsoid
48 8.2.2 Prime meridian
49 8.2.3 Geodetic reference frame (datum)
50 8.3 Coordinate systems for geodetic and geographic CRSs
51 8.4 Examples of WKT describing a geodetic or geographic CRS
52 9 WKT representation of projected CRSs
9.1 Overview
9.2 Base CRS
9.2.1 General
53 9.2.2 Ellipsoidal CS unit
54 9.3 Map projection
9.3.1 Introduction
55 9.3.2 Map projection name and identifier
9.3.3 Map projection method
56 9.3.4 Map projection parameter
9.4 Coordinate systems for projected CRSs
9.5 Examples of WKT describing a projected CRS
58 10 WKT representation of vertical CRSs
10.1 Overview
59 10.2 Vertical reference frame (vertical datum)
10.3 Vertical coordinate system
60 10.4 Example of WKT describing a vertical CRS
11 WKT representation of engineering CRSs
11.1 Overview
11.2 Engineering datum
61 11.3 Coordinate systems for engineering CRSs
11.4 Examples of WKT describing an engineering CRS
62 12 WKT representation of parametric CRSs
12.1 Overview
12.2 Parametric datum
12.3 Parametric coordinate system
12.4 Example of WKT describing a parametric CRS
63 13 WKT representation of temporal CRSs
13.1 Temporal CRS
13.2 Temporal datum
64 13.3 Temporal coordinate system
13.3.1 General
13.3.2 Axis unit for temporalDateTime coordinate systems
13.3.3 Axis unit for temporalCount and temporalMeasure coordinate systems
13.4 Examples of WKT describing a temporal CRS
65 14 WKT representation of derived CRSs
14.1 Overview
66 14.2 Deriving conversion
14.2.1 General
14.2.2 Derived CRS conversion method
67 14.2.3 Derived CRS conversion parameter
14.2.4 Derived CRS conversion parameter file
68 14.2.5 Derived CRS conversion example
14.3 Derived geodetic CRS and derived geographic CRS
14.3.1 Representation
70 14.3.2 Example of WKT describing a derived geographic CRS
14.4 Derived projected CRS
14.4.1 Representation
71 14.4.2 Example of WKT describing a derived projected CRS
72 14.5 Derived vertical CRS
14.6 Derived engineering CRS
73 14.7 Derived parametric CRS
14.8 Derived temporal CRS
74 15 WKT representation of compound coordinate reference systems
15.1 Overview
15.2 Examples of WKT describing a compound CRS
75 16 WKT representation of coordinate epoch and coordinate metadata
16.1 Coordinate epoch
76 16.2 Coordinate metadata
77 17 WKT representation of coordinate transformations and coordinate conversions excluding map projections
17.1 Coordinate operations
17.2 Transformation and conversion components
17.2.1 Operation name and version
17.2.2 Source and target CRS
78 17.2.3 Transformation and conversion name and identifier
17.2.4 Coordinate operation method
17.2.5 Coordinate operation parameter
79 17.2.6 Coordinate operation parameter file
17.2.7 Interpolation CRS
17.2.8 Coordinate operation accuracy
80 17.2.9 Other coordinate operation attributes
17.3 Examples of WKT describing a coordinate transformation
81 18 WKT representation of point motion operations
82 19 WKT representation of concatenated coordinate operations
19.1 General
84 19.2 Examples of WKT describing a concatenated coordinate operation
85 20 WKT representation of CRS and coordinate operation couplets
20.1 Bound CRS
86 20.2 Bound CRS components
20.2.1 Abridged coordinate transformation
20.2.2 Coordinate operation method in abridged coordinate transformations
20.2.3 Abridged coordinate transformation parameter
87 20.2.4 Coordinate operation parameter file
20.3 Examples of WKT describing a bound CRS
89 Annex A (normative) Abstract test suite
98 Annex B (informative) Recommended practice for implementation
101 Annex C (informative) Mapping of concepts from previous versions of CRS WKT
112 Annex D (informative) Backward compatibility with ISO 19162:2015
116 Annex E (normative) Triaxial ellipsoid
117 Annex F (informative) Identifiers for coordinate operation methods and parameters
122 Bibliography

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BS ISO 19162:2019
$215.11