ISO 19148:2021
Geographic information — Linear referencing
This document specifies a conceptual schema for locations relative to a one-dimensional object as measurement along (and optionally offset from) that object. It defines a description of the data and operations required to use and support linear referencing.
This document is applicable to transportation, utilities, environmental protection, location-based services and other applications which define locations relative to linear objects. For ease of reading, most examples discussed in this document come from the transportation domain.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms and UML notation
4.1 Abbreviated terms
4.2 UML notation
5 Conformance
5.1 Conformance overview
5.2 Conformance classes
5.2.1 General
5.2.2 Data type conformance
5.2.3 Operation conformance
6 Linear referencing
6.1 Background
6.1.1 Linear referencing concepts
6.1.2 Linear referencing packages
6.2 Package: Linear Referencing System
6.2.1 Semantics
6.2.2 PositionExpression
6.2.3 LinearElement
6.2.4 LinearElementType
6.2.5 ILinearElement
6.2.6 IFeature
6.2.7 ISpatial
6.2.8 LinearReferencingMethod
6.2.9 DistanceAlongDirection
6.2.10 LRMType
6.2.11 DistanceExpression
6.2.12 Referent
6.2.13 ReferentType
6.2.14 ValueExpression
6.3 Package: Linear Referencing Towards Referent
6.3.1 Semantics
6.3.2 LRMWithTowardsReferent
6.3.3 DistanceExpression
6.4 Package: Linear Referencing Offset
6.4.1 Semantics
6.4.2 LRMWithOffset
6.4.3 LateralOffsetDirection
6.4.4 VerticalOffsetDirection
6.4.5 LateralOffsetDistanceExpression
6.4.6 LateralOffsetExpression
6.4.7 LateralOffsetReferent
6.4.8 VerticalOffsetExpression
6.4.9 VerticalOffsetReferent
6.4.10 ICrossSectionalConvention
6.4.11 ICrossSectionalConventionPart
6.5 Package: Linear Referencing Offset Vector
6.5.1 Semantics
6.5.2 VectorOffsetDistanceExpression
6.5.3 VectorOffsetExpression
6.6 Package: Linearly Located Event
6.6.1 Semantics
6.6.2 Linearly located event
6.6.3 Event
6.6.4 AttributeEvent
6.6.5 FeatureEvent
6.6.6 EventLocation
6.6.7 AtLocation
6.6.8 FromToLocation
6.6.9 EventTime
6.6.10 EventInstant
6.6.11 EventPeriod
6.7 Package: Linear Segmentation
6.7.1 Semantics
6.7.2 SegmentableFeature
6.7.3 LinearSegmentSet
6.7.4 LinearSegment
Annex A (normative) Abstract test suite
Annex B (informative) Generalized Model for Linear Referencing
Annex C (informative) Commonly used linear referencing methods and models
Annex D (informative) Application Schema example
Annex E (informative) Event and segmentation examples
Annex F (informative) Backwards compatibility with ISO 19148:2012
Bibliography
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Geographic information – Conceptual schema language
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms and UML notation
4.1 Abbreviated terms
4.2 UML notation
5 Conformance
5.1 Conformance overview
5.2 Conformance classes
5.2.1 General
5.2.2 Data type conformance
5.2.3 Operation conformance
6 Linear referencing
6.1 Background
6.1.1 Linear referencing concepts
6.1.2 Linear referencing packages
6.2 Package: Linear Referencing System
6.2.1 Semantics
6.2.2 PositionExpression
6.2.3 LinearElement
6.2.4 LinearElementType
6.2.5 ILinearElement
6.2.6 IFeature
6.2.7 ISpatial
6.2.8 LinearReferencingMethod
6.2.9 DistanceAlongDirection
6.2.10 LRMType
6.2.11 DistanceExpression
6.2.12 Referent
6.2.13 ReferentType
6.2.14 ValueExpression
6.3 Package: Linear Referencing Towards Referent
6.3.1 Semantics
6.3.2 LRMWithTowardsReferent
6.3.3 DistanceExpression
6.4 Package: Linear Referencing Offset
6.4.1 Semantics
6.4.2 LRMWithOffset
6.4.3 LateralOffsetDirection
6.4.4 VerticalOffsetDirection
6.4.5 LateralOffsetDistanceExpression
6.4.6 LateralOffsetExpression
6.4.7 LateralOffsetReferent
6.4.8 VerticalOffsetExpression
6.4.9 VerticalOffsetReferent
6.4.10 ICrossSectionalConvention
6.4.11 ICrossSectionalConventionPart
6.5 Package: Linear Referencing Offset Vector
6.5.1 Semantics
6.5.2 VectorOffsetDistanceExpression
6.5.3 VectorOffsetExpression
6.6 Package: Linearly Located Event
6.6.1 Semantics
6.6.2 Linearly located event
6.6.3 Event
6.6.4 AttributeEvent
6.6.5 FeatureEvent
6.6.6 EventLocation
6.6.7 AtLocation
6.6.8 FromToLocation
6.6.9 EventTime
6.6.10 EventInstant
6.6.11 EventPeriod
6.7 Package: Linear Segmentation
6.7.1 Semantics
6.7.2 SegmentableFeature
6.7.3 LinearSegmentSet
6.7.4 LinearSegment
Annex A (normative) Abstract test suite
Annex B (informative) Generalized Model for Linear Referencing
Annex C (informative) Commonly used linear referencing methods and models
Annex D (informative) Application Schema example
Annex E (informative) Event and segmentation examples
Annex F (informative) Backwards compatibility with ISO 19148:2012
Bibliography