ISO/TR 21718:2017

TECHNICAL ISO/TR
REPORT 21718
First edition
2017-11
Intelligent transport systems —
Spatio-temporal data dictionary
for cooperative ITS and automated
driving systems
Systèmes de transport intelligents — Dictionnaire de données spatio-
temporelles pour les systèmes de conduite automatisée et les STI
coopératifs
Reference number
ISO/TR 21718:2017(E)
©
ISO 2017

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ISO/TR 21718:2017(E)

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ISO/TR 21718:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Contents and descriptive names of data dictionary . 3
6 Data dictionary description . 3
Annex A (informative) Dedicated data type for data dictionary .184
Bibliography .191
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ISO/TR 21718:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
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ISO/TR 21718:2017(E)

Introduction
Cooperative ITS and automated driving systems as energy-saving technology have attracted much
attention. These systems are expected to reduce traffic congestion and achieve smoother transportation.
Recently, car manufacturers, car parts manufacturers and IT companies have started driving tests for
automated driving systems on the public road. Several car manufacturers have released the schedule
of commercial viability and automated driving systems and are expected to put it into practical use
within two or three years.
In the existing ITS applications, geographical information are optimally designed for individual
systems. Thus, a large amount of resources are required in order to create, provide and maintain this
information.
In the future, spatio-temporal data for ITS which includes static and dynamic temporal-spatial data
will be required for Cooperative ITS and automated driving systems. In order to create, provide and
maintain these data, much more resources will be required.
Spatio-temporal data can be used for different types of application systems. A common understanding
and sharing of spatio-temporal data is formulated by this data dictionary. For instance, spatio-temporal
data for ITS includes location information or has relationships with location.
Standardization of spatio-temporal data dictionary is expected to contribute to research and
development and dissemination of cooperative ITS and automated systems by stakeholders.
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TECHNICAL REPORT ISO/TR 21718:2017(E)
Intelligent transport systems — Spatio-temporal data
dictionary for cooperative ITS and automated driving
systems
1 Scope
This document describes a spatio-temporal data dictionary for cooperative ITS and automated driving
systems.
This data dictionary includes static data and dynamic data.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
aggregate domain
data concept that defines a grouping of data elements and/or data frames
3.2
data concept
item that may be stored in a data dictionary that refers to an abstraction or thing in the natural world
that can be identified with explicit boundaries and meaning and whose properties and behaviour all
follow the same rules
Note 1 to entry: Data concepts can be classified into the following types: object class, value domain, data element,
aggregate domain, data frame, message, interface dialogue, dictionary document, or module.
3.3
data concept type
categorization of the kind of data concept
3.4
data dictionary
listing of data concepts and their meta-attributes in a consistent format
3.5
data element
data concept represented by a specific value domain that describes a single atomic property about an
object class
Note 1 to entry: A data element is composed of an object class, a property of the represented object class and a
value domain.
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3.6
data frame
data concept represented by a specific aggregate domain that describes information of interest through
a useful grouping of more atomic properties about one or more object classes
Note 1 to entry: The grouping may be a set, sequence, or a choice.
3.7
dynamic data
data which has short life-span data such as a position of vehicle
3.8
message
data concept that is a grouping of data elements, data frames, or data elements and data frames that is
used to convey a complete set of information
Note 1 to entry: For the purposes of this document, a message is an abstract description; it is not a specific
instance.
3.9
module
data concept that contains the formal syntactic definition, and optionally the semantic definition, of a
defined set of other data concepts that are all version-controlled as a single unit
Note 1 to entry: A module can be represented in multiple languages (e.g., ASN.1 or XML Schema) and compiled by
computer systems.
3.10
source
document or other reference that was used to develop the pertinent data concept
3.11
spatio-temporal (adjective)
relating to both space and time
3.12
static data
data which do not change automatically
3.13
value domain
data concept that defines a set of permissible values
4 Abbreviated terms
ACC Adaptive Cruise Control systems
APS Assisted Parking System
CACC Cooperative adaptive cruise control
CIWS Cooperative Intersection signal information and violation Warning Systems
CSWS Curve Speed Warning Systems
FVCMS Forward Vehicle Collision Mitigation Systems
GNSS Global Navigation Satellite System
ITS Intelligent Transport Systems
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JARI Japan Automobile Research Institute
LCDAS Lane Change Decision Aid Systems
LKAS Lane Keeping Assistance Systems
TISA Traveller Information Services Association
5 Contents and descriptive names of data dictionary
The data dictionary consists of the following items.
Data concept name descriptive name of data concepts
data concept type module/message/data frame/data element/aggregate
domain/value domain
data status category dynamic/static
Definition and description Definition and description of data contents
Data definition of data content by XML schema
structure
Issued by authors who published the source documents
source documents original documents
remark other information
6 Data dictionary description
This data dictionary is described alphabetically.
[a]
absolute geo coordinate
Data concept AbsoluteGeoCoordinate Data status category static
name
Data concept type data element
Definition and AbsoluteGeoCoordinate specifies a geo position with longitude and latitude values
description with a deca micro degree accuracy stored in 24 bit integer value.
Longitude: 24-bit representation of a longitude value in deca micro degree precision.
Latitude: 24-bit representation of a latitude value in deca micro degree precision.
Altitude: Elevation of location in metres above/below Mean Sea Level.
Data
structure 
  
  
  
 

Issued by source document ISO/TS 21219-22:2017
Remarks
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acceleration
Data concept Acceleration Data status category dynamic
name
Data concept type data element
Definition and Acceleration provides a value and unit of vehicle acceleration.
description
Value of unit of acceleration is given by unit code which is assigned as 0,01 m/sec*sec,
0,02 m/sec*sec, 0,1 m/sec*sec, 0,25 m/sec*sec, 1 m/sec*sec, 0,01 G and 0,02 G.
Data
structure
 
 
 

Issued by JARI source document proposed CITS data dictionary
Remarks
acceleration set
Data concept Acceleration Set Data status category dynamic
name
Data concept type data element
Definition and Acceleration Set provides accelerations of three axial directions of vehicle.
description
Data
structure 
 
 

Issued by JARI source document proposed CITS data dictionary
Remarks
acceleration confidence
Data concept Acceleration confidence Data status category dynamic
name
Data concept type data element
Definition and AccelerationConfidence provides the confidence of acceleration of the vehicle.
description
It is a confidence level of 95 % of reliability.
Data
structure 

Issued by JARI source document proposed CITS data dictionary
Remarks
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accuracy millimetre
Data concept AccuracyMillimetre Data status category static
name
Data concept type value domain
Definition and It is one of the accuracy expressions for a length or distance.
description
Unit is a millimetre.
Data
structure 
  
 

Issued by source document ISO 22837:2009
Remarks
advisory point
Data concept AdvisoryPoint Data status category static
name
Data concept type data element
Definition and Advisor Point provides a location and contents of the advisory on the road.
description
Data
structure 
  
  
  
  
   cures="0"/>
   cures="0"/>
   cures="0"/>
  
  
  
 

Issued by source document ISO 14296:2016
Remarks
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altitude
Data concept Altitude Data status category static
name
Data concept type value domain
Definition and It provides a value of the Altitude of ITRF94 coordinate.
description
Unit of standard resolution is 10 mm and unit of high resolution is 1 cm.
Data
structure 
  
   
   
   
   
   
   
   
   
   
 

Issued by source document ISO 14296:2016
Remarks
ambient air pressure
Data concept AmbientAirPressure Data status category dynamic
name
Data concept type data element
Definition and It provides an ambient air pressure sensed by OBU/RSU
description
conformity SAE J2735
The value of data expresses 1,090 hPa from 580 hPa. Value "0" means "unknown", unit
is 2 hPa.
Data
structure 

Issued by JARI source document proposed CITS data dictionary
Remarks
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angle of curved road
Data name AngleOfCurvedRoad Data status category static
Data concept type value domain
Definition and Central angle between the curve start point and the curve end point [radian]
description
Data
structure
Issued by source document ISO 11067:2015 CSWS
Remarks
availability of moving adjoining lane
Data concept AvailabilityOfMovingAdjoin-
Data status category static
name ing Lane
Data concept type value domain
Definition It is one of the attributes of the lane. It provides availability of moving to adjoining lanes.
and
description
Data
structure   
      
    
      
      
      
      
    
   
   
    
   
 

Issued by source document ISO 14296:2016
Remarks
available service
Data concept AvailableService Data status category static
name
Data concept type data element
Definition and This is services in Parking Facility
description
(i.e. fuel station, car wash, toilet, restaurant, shop, shower room, break room)
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Data
structure
Issued by source document ISO 16787:2016 APS
Remarks
axle location
Data concept AxleLocation Data status category static
name
Data concept type aggregate domain
Definition and This is location of the axle of the vehicle. Location is shown by the length from a bumper.
description
conformity SAE J1939
Unit value of location is given by 4 bit code which is assigned as 0,01 m, 0,05 m,
0,1 m, 0,2 m.
Data
structure 
    
    
    
    
 

Issued by JARI source document proposed CITS data dictionary
Remarks Real value of location is the product of a valueOfAlexPosition and unitOfAlex.
axle weight
Data concept AxleWeight Data status category static
name
Data concept type value domain
Definition and It provides the weight of the axle of vehicle.
description
conformity SAE J1939
Unit value of weight is given by 4 bit code which is assigned as 0,1 Kg, 0,2 Kg, 0,5 Kg,
1 kg, 10 Kg, 20 Kg.
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Data
structure 
  
  
         
    
     
      
       
       
       
       
       
       
      
     
     
      
     
    
        
  
 

Issued by JARI source document proposed CITS data dictionary
Remarks Real weight is the product of a valueOfWeight and a unitOfWeight.
azimuth
Data concept Azimuth Data status category dynamic
name
Data concept type value domain
Definition and It provides an angle between a direction of target and direction of reference of the hori-
description zontal plane. Generally, direction of reference is north and clockwise.
Data
structure 
 

Issued by JARI source document proposed CITS data dictionary
Remarks Real value of Azimuth is the product of an azimuthValue and azimuthUnit.
azimuth and length
Data concept AzimuthAndLength Data status category dynamic
name
Data concept type aggregate domain
Definition and It provides a relative position from reference point to target object.
description
A relative position is expressed by an azimuth and a length.
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Data
structure   
   

Issued by source document ISO 16787:2016 APS
Remarks
azimuth attribute
Data concept AzimuthAttribute Data status category dynamic
name
Data concept type data frame
Definition and AzimuthAttribute provides objects and unit of azimuth.
description
Data
structure 
  
  
 

Issued by JARI source document proposed CITS data dictionary
Remarks
azimuth confidence
Data concept AzimuthConfidence Data status category dynamic
name
Data concept type data frame
Definition and AzimuthConfidence is composed of heading confidence and direction of road confidence.
description
Data
structure  
    
    
  

Issued by JARI source document proposed CITS data dictionary
Remarks
azimuth expression
Data concept AzimuthExpression Data status category dynamic
name
Data concept type data frame
Definition and AzimuthExpression is composed of Azimuth and AzimuthAttribute.
description
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Data
structure  
    
    
  

Issued by JARI source document proposed CITS data dictionary
Remarks
azimuth object
Data concept AzimuthObject Data status category dynamic
name
Data concept type data frame
Definition and AzimuthObject indicates the expression object (i.e. device, road, event and region) of
description Azimuth.
Data
structure 
  
  
  
  
 

Issued by JARI source document proposed CITS data dictionary
Remarks
azimuth object device
Data concept AzimuthObjectDevice Data status category dynamic
name
Data concept type data frame
Definition and It indicates an OBU or RSU device for azimuth object.
description
Data
structure
Issued by JARI source document proposed CITS data dictionary
Remarks Data Type "EXTERNAL" represents to be defined by other organization, or undefined.
azimuth object event
Data concept AzimuthObjectEvent Data status category dynamic
name
Data concept type data frame
Definition and It indicates the event for azimuth object.
description
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Data
structure
Issued by JARI source document proposed CITS data dictionary
Remarks Data Type "EXTERNAL" represents to be defined by other organization, or undefined.
azimuth object region
Data concept AzimuthObjectRegion Data status category dynamic
name
Data concept type data frame
Definition and AzimuthObjectRegion indicates the region for azimuth object.
description
Data
structure
Issued by JARI source document proposed CITS data dictionary
Remarks Data Type "EXTERNAL" represents to be defined by other organization, or undefined.
azimuth object road
Data concept AzimuthObjectRoad Data status category dynamic
name
Data concept type data frame
Definition and AzimuthObjectRoad indicates the road for azimuth object.
description
Data
structure
Issued by JARI source document proposed CITS data dictionary
Remarks Data Type "EXTERNAL" represents to be defined by other organization, or undefined.
azimuth type
Data concept AzimuthType Data status category dynamic
name
Data concept type data element
Definition and AzimuthType indicates "azimuth" or "direction".
description
Data
structure
Issued by JARI source document proposed CITS data dictionary
Remarks True indicates "azimuth", False indicates "direction"
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azimuth unit
Data concept AzimuthUnit Data status category dynamic
name
Data concept type value domain
Definition and AzimuthUnit indicates minimum unit of azimuth.
description
Value of Unit of Azimuth is provided by 4 bit code.
Data
structure 
   
    
     
     
     
     
     
     
     
     
     
     
     
    
   
   
     
   
 

Issued by JARI source document proposed CITS data dictionary
Remarks
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[b]
bad weather condition
Data concept BadWeatherCondition Data status category dynamic
name
Data concept type data frame
Definition and BadWeatherCondition indicates weather condition such as rain, sunshine and ambient
description air pressure.
Data
structure 
  
  
  
 

Issued by JARI source document proposed CITS data dictionary
Remarks
bearing
Data concept Bearing Data status category dynamic
name
Data concept type value domain
Definition and Bearing stores the value of a bearing angle in a compressed way. The full circle is divid-
description ed into 256 sectors which yields a precision of 360/256 °.
Data
structure 
 
 

Issued by source document ISO/TS 21219-22:2017
Remarks
boundary object
Data concept BoundaryObject Data status category static
name
Data concept type data element
Definition and It provides a feature object for indicating the boundary of an individual parking space
description
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