ISO 21219-19:2023

Intelligent transport systems — Traffic and travel information (TTI) via transport protocol experts group, generation 2 (TPEG2) — Part 19: Weather information (TPEG2-WEA)

This document defines the TPEG Weather (WEA) application for reporting weather information for travellers. It provides general weather-related information to all travellers and is not limited to a specific mode of transportation. This application does not provide specific weather-related safety warnings to drivers; these are provided as safety related messages as part of the TPEG2-TEC application (ISO 21219-15). The WEA application provides weather-related forecasts and status information over multiple time periods and for multiple, possibly linked, geographical areas. NOTE The presentation of the information is dependent on the specific human-machine interface (HMI) of the receiving device. Therefore, this document does not define any prerequisites for the HMI of the device. This document contains examples to help explain how some typical weather reports can be signalled (see Annex C) and suggested translations between WEA table codes and WMO SYNOP weather observation codes (see Annex D).

Systèmes intelligents de transport — Informations sur le trafic et le tourisme via le groupe expert du protocole de transport, génération 2 (TPEG2) — Partie 19: Renseignements météorologiques (TPEG2-WEA)

General Information

• Status: Published
• Publication Date: 08-Jun-2023
• ICS: 03.220.01 - Transport in general
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 10 - Traveller information systems
• Current Stage: 6060 - International Standard published
• Start Date: 09-Jun-2023
• Due Date: 04-Sep-2022
• Completion Date: 09-Jun-2023

Relations

• Revises: ISO/TS 21219-19:2016 - Intelligent transport systems — Traffic and travel information (TTI) via transport protocol experts group, generation 2 (TPEG2) — Part 19: Weather information (TPEG2-WEA)
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21219-19
First edition
2023-06
Intelligent transport systems —
Traffic and travel information (TTI)
via transport protocol experts group,
generation 2 (TPEG2) —
Part 19:
Weather information (TPEG2-WEA)
Systèmes intelligents de transport — Informations sur le trafic et le
tourisme via le groupe expert du protocole de transport, génération 2
(TPEG2) —
Partie 19: Renseignements météorologiques (TPEG2-WEA)
Reference number
ISO 21219-19:2023(E)
© ISO 2023

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ISO 21219-19:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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ISO copyright office
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Published in Switzerland
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ISO 21219-19:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Application specific constraints . .2
5.1 Application identification . 2
5.2 Version number signalling . 2
5.3 Ordered components . . 2
5.4 Extendibility . 3
5.5 TPEG service component frame . 3
6 WEA structure . 3
7 WEA message components . 4
7.1 General . 4
7.2 WeatherMessage . 5
7.3 WeatherInformation . 6
7.4 WeatherReport . 7
7.5 WeatherItem . 7
7.6 WeatherStatistics . 8
7.7 WeatherWarning . 10
7.8 AltitudeElements . 10
7.9 OutlookTrend . 10
7.10 ReportLinkInfo . . 11
7.11 WebContentLinks . 11
7.12 MMCSwitch . 11
7.13 MMCMessagePartLink . 11
7.14 MMCMasterMessageLink .12
7.15 MessageManagementContainerLink .12
7.16 LocationReferencingContainerLink .12
8 WEA datatypes .12
8.1 LinkedMessage .12
8.2 Element . 13
9 WEA tables .13
9.1 wea000:ReportType . 13
9.2 wea001:Period . 13
9.3 wea002:TrendItem . 15
9.4 wea003:Direction . 16
9.5 wea004:PressureTendency . 16
9.6 wea005:Visibility . 17
9.7 wea006:SeaState . 17
9.8 wea007:PollenCount . 17
9.9 wea008:AirQuality . 18
9.10 wea009:WarningLevel . 18
9.11 wea010:UVIndex . 19
9.12 wea011:GeoSignificance . 19
9.13 wea012:WindDirectionTrend . 20
9.14 wea013:WindSpeedTrend . .20
9.15 wea014:ContentType . 20
9.16 wea099:ElementSubTable.20
9.17 wea100:ElementType . 21
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ISO 21219-19:2023(E)
9.18 wea101:RainElements . . 21
9.19 wea102:SnowElements . 22
9.20 wea103:SleetHailElements . 22
9.21 wea104:WindElements .22
9.22 wea105:StormElements . 23
9.23 wea106:FogElements . 24
9.24 wea107:FrostElements .25
9.25 wea108:SunshineCloudElements . 25
9.26 wea109:TemperatureElements . 25
9.27 wea110:HazardElements . .26
9.28 wea200:ElementQualifier .26
9.29 wea201:ElementQualifierProbability .28
Annex A (normative) TPEG application, TPEG-binary representation .29
Annex B (normative) TPEG application, TPEG-ML representation .38
Annex C (informative) Worked examples .49
Annex D (informative) Suggested translation between WEA table codes and WMO SYNOP
weather observation codes .54
Bibliography .61
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ISO 21219-19:2023(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This first edition cancels and replaces the first edition (ISO/TS 21219-19:2016), which has been
technically revised.
The main changes are as follows:
— the document has been changed from a Technical Specification to an International Standard;
— a NOTE and one new WeatherStatistics value have been added in Table 6.
A list of all parts in the ISO 21219 series can be found on the ISO website.
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.
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ISO 21219-19:2023(E)
Introduction
0.1  History
TPEG technology was originally proposed by the European Broadcasting Union (EBU) Broadcast
Management Committee, who established the B/TPEG project group in the autumn of 1997 with a brief
to develop, as soon as possible, a new protocol for broadcasting traffic and travel-related information in
the multimedia environment. TPEG technology, its applications and service features were designed to
enable travel-related messages to be coded, decoded, filtered and understood by humans (visually and/
or audibly in the user’s language) and by agent systems. Originally, a byte-oriented data stream format,
which can be carried on almost any digital bearer with an appropriate adaptation layer, was developed.
Hierarchically structured TPEG messages from service providers to end-users were designed to
transfer information from the service provider database to an end-user’s equipment.
One year later, in December 1998, the B/TPEG group produced its first EBU specifications. Two
documents were released. Part 2 (TPEG-SSF, which became ISO/TS 18234-2) described the syntax,
semantics and framing structure which was used for all TPEG applications. Meanwhile, Part 4 (TPEG-
RTM, which became ISO/TS 18234-4) described the first application for road traffic messages.
Subsequently, in March 1999, CEN/TC 278, in conjunction with ISO/TC 204, established a group
comprising members of the former EBU B/TPEG and this working group continued development
work. Further parts were developed to make the initial set of four parts, enabling the implementation
of a consistent service. Part 3 (TPEG-SNI, later ISO/TS 18234-3) described the service and network
information application used by all service implementations to ensure appropriate referencing from
one service source to another.
Part 1 (TPEG-INV, later ISO/TS 18234-1) completed the series by describing the other parts and their
relationship; it also contained the application IDs used within the other parts. Additionally, Part 5, the
public transport information application (TPEG-PTI, later ISO/TS 18234-5), was developed. The so-
called TPEG-LOC location referencing method, which enabled both map-based TPEG-decoders and non-
map-based ones to deliver either map-based location referencing or human-readable text information,
was issued as ISO/TS 18234-6 to be used in association with the other applications of parts of the
ISO 18234 series to provide location referencing.
The ISO 18234 series has become known as TPEG Generation 1.
0.2  TPEG generation 2
When the Traveller Information Services Association (TISA), derived from former forums, was
inaugurated in December 2007, TPEG development was taken over by TISA and continued in the TPEG
applications working group.
It was about this time that the (then) new Unified Modelling Language (UML) was seen as having major
advantages for the development of new TPEG applications in communities who would not necessarily
have the binary physical format skills required to extend the original TPEG TS work. It was also realized
that the XML format for TPEG described within the ISO 24530 series (now superseded) had a greater
significance than previously foreseen, especially in the content-generation segment, and that keeping
two physical formats in synchronism, in different standards series, would be rather difficult.
As a result, TISA set about the development of a new TPEG structure that would be UML-based. This has
subsequently become known as TPEG Generation 2 (TPEG2).
TPEG2 is embodied in the ISO 21219 series and it comprises many parts that cover an introduction,
rules, toolkit and application components. TPEG2 is built around UML modelling and has a core of
rules that contain the modelling strategy covered in ISO 21219-2, ISO 21219-3 and ISO 21219-4 and the
conversion to two current physical formats: binary (see Annex A) and XML (see Annex B); others can
be added in the future. TISA uses an automated tool to convert from the agreed UML model XMI file
directly into an MS Word document file, to minimize drafting errors; this file forms the annex for each
physical format.
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ISO 21219-19:2023(E)
TPEG2 has a three-container conceptual structure: message management (ISO 21219-6), application
(several parts) and location referencing (ISO/TS 21219-7). This structure has flexible capability and
can accommodate many differing use cases that have been proposed within the TTI sector and wider
for hierarchical message content.
TPEG2 also has many location referencing options as required by the service provider community, any
of which may be delivered by vectoring data included in the location referencing container.
The following classification provides a helpful grouping of the different TPEG2 parts according to their
intended purpose. Note that the list below is potentially incomplete, as there is the possibility that new
TPEG2 parts will be introduced after the publication of this document.
— Toolkit parts: TPEG2-INV (ISO 21219-1), TPEG2-UML (ISO 21219-2), TPEG2-UBCR (ISO 21219-3),
TPEG2-UXCR (ISO 21219-4), TPEG2-SFW (ISO 21219-5), TPEG2-MMC (ISO 21219-6), TPEG2-LRC
(ISO/TS 21219-7).
— Special applications: TPEG2-SNI (ISO 21219-9), TPEG2-CAI (ISO 21219-10), TPEG2-LTE
(ISO/TS 21219-24).
— Location referencing: TPEG2-OLR (ISO/TS 21219-22), TPEG2-GLR (ISO/TS 21219-21), TPEG2-TLR
(ISO 17572-2), TPEG2-DLR (ISO 17572-3).
— Applications: TPEG2-PKI (ISO 21219-14), TPEG2-TEC (ISO 21219-15), TPEG2-FPI (ISO 21219-16),
TPEG2-SPI (ISO 21219-17), TPEG2-TFP (ISO 21219-18), TPEG2-WEA (ISO 21219-19 - this document),
TPEG2-RMR (ISO/TS 21219-23), TPEG2-EMI (ISO/TS 21219-25), TPEG2-VLI (ISO/TS 21219-26).
TPEG2 has been developed to be broadly (but not totally) backward compatible with TPEG1 to assist in
transitions from earlier implementations, while not hindering the TPEG2 innovative approach and being
able to support many new features, such as dealing with applications with both long-term, unchanging
content and highly dynamic content, such as parking information.
This document is based on the TISA specification technical/editorial version reference:
SP20014/1.2/001.
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INTERNATIONAL STANDARD ISO 21219-19:2023(E)
Intelligent transport systems — Traffic and travel
information (TTI) via transport protocol experts group,
generation 2 (TPEG2) —
Part 19:
Weather information (TPEG2-WEA)
1 Scope
This document defines the TPEG Weather (WEA) application for reporting weather information for
travellers. It provides general weather-related information to all travellers and is not limited to a
specific mode of transportation.
This application does not provide specific weather-related safety warnings to drivers; these are
provided as safety related messages as part of the TPEG2-TEC application (ISO 21219-15).
The WEA application provides weather-related forecasts and status information over multiple time
periods and for multiple, possibly linked, geographical areas.
NOTE The presentation of the information is dependent on the specific human-machine interface (HMI) of
the receiving device. Therefore, this document does not define any prerequisites for the HMI of the device.
This document contains examples to help explain how some typical weather reports can be signalled
(see Annex C) and suggested translations between WEA table codes and WMO SYNOP weather
observation codes (see Annex D).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 21219-1, Intelligent transport systems — Traffic and travel information (TTI) via transport protocol
experts group, generation 2 (TPEG2) — Part 1: Introduction, numbering and versions (TPEG2-INV)
ISO 21219-9, Intelligent transport systems — Traffic and travel information (TTI) via transport protocol
experts group, generation 2 (TPEG2) — Part 9: Service and network information (TPEG2-SNI)
ISO 21219-14, Intelligent transport systems — Traffic and travel information (TTI) via transport protocol
experts group, generation 2 (TPEG2) — Part 14: Parking information (TPEG2-PKI)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21219-9 and ISO 21219-14
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
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ISO 21219-19:2023(E)
4 Abbreviated terms
For the purposes of this document, the abbreviated terms given in ISO 21219-1, ISO 21219-9,
ISO 21219-14 and the following apply.
AQI air quality index
HMI human-machine interface
RF radio frequency
SYNOP surface synoptic observations
UV ultraviolet
UVI UV Index
WHO World Health Organization
WMO World Meteorological Organization
5 Application specific constraints
5.1 Application identification
The word “application” is used in the TPEG specifications to describe specific subsets of the TPEG
structure. An application defines a limited vocabulary for a certain type of messages, for example,
parking information or road traffic information. Each TPEG application is assigned a unique number,
called the application identity (AID). An AID number is defined in ISO 21219-1 whenever a new
application is developed.
The AID number is used within the TPEG2-SNI application (ISO 21219-9) to indicate how to process
TPEG content. It facilitates the routing of information to the appropriate application decoder.
5.2 Version number signalling
Version numbering is used to track the separate versions of an application through its development and
deployment. The differences between these versions can have an impact on client devices.
The version numbering principle is defined in ISO 21219-1.
Table 1 shows the current version numbers for signalling WEA within the SNI application.
Table 1 — Current version numbers for signalling of WEA
Major version number 1
Minor version number 2
5.3 Ordered components
TPEG2-WEA requires a fixed order of TPEG components. The order for the WEA message component
is shown in Figure 1. The first component shall be the MMC. This shall be the only component if the
message is a cancellation message. Otherwise, the MMC component shall be followed by the one or more
ADC component(s) which includes the application-specific information.
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ISO 21219-19:2023(E)
Figure 1 — Composition of TPEG messages
5.4 Extendibility
The requirement of a fixed component order does not affect the extension of WEA. Future application
extensions may insert new components or may replace existing components by new ones without
losing backward compatibility. That means a WEA decoder shall be able to detect and skip unknown
components.
5.5 TPEG service component frame
WEA makes use of the “service component frame with dataCRC and messageCount” according to
TPEG2-SFW specified by ISO 21219-5.
6 WEA structure
WEA message structure is shown in Figure 2. The binary format and XML format of the TPEG2-WEA
application for use in transmission shall be in accordance with Annexes A and B, respectively.
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ISO 21219-19:2023(E)
Figure 2 — WEA message structure
7 WEA message components
7.1 General
The WEA application provides a flexible message interface for distribution of weather information.
To enable multiple levels of detail to be signalled, WEA provides two different hierarchal structures to
allow messages to cover multiple geographical areas and also to cover different time periods. Messages
may be linked to each other to provide a geographical hierarchy of the weather reports which can be
exploit
...