ISO 17572-3:2015

Overview

ISO 17572-3:2015 - "Intelligent transport systems (ITS) - Location referencing for geographic databases - Part 3: Dynamic location references (dynamic profile)" specifies a standardized method to describe and encode dynamic location references (LRMs) for use with geographic databases in ITS applications. The standard focuses on how to represent locations of transport‑related phenomena for both encoder and decoder systems, enabling unambiguous, interoperable exchange of location information across map vendors, traffic services and navigation platforms.

Key topics and requirements

• Dynamic location referencing method (dynamic profile): Defines attributes and encoding rules specific to dynamic LRMs, distinct from the pre‑coded profile covered in Part 2.
• Location referencing building blocks: Formalizes components such as points, attributes, and next‑point relationships used to compose location references.
• Encoding rules: Detailed rules for core and extension encoding, including point selection, intersection and routing point attributes, and how to code point and area locations.
• Logical data modelling: Specifies the logical data formats and models for linear, implicit area and explicit area representations.
• TPEG physical format specification: Provides the TPEG2 representations (logical structure, binary and XML forms) to carry dynamic location references in broadcast and IP‑based services.
• Coding guidelines and compressed format: Practical guidance for creating reliable dynamic LRMs and a compressed data format specification for efficient transmission.
• Normative/Informative annexes: Includes TPEG2 logical structure, binary and XML representations, coding guidelines, and a compressed data format specification.

Note: ISO 17572-3 specifies requirements for physical formats but does not mandate specific software/hardware implementation details of a Location Referencing System (LRS). The document also references Part 1 (general model) and Part 2 (pre‑coded profile).

Applications and users

ISO 17572-3 is intended for:

• ITS solution architects and software engineers implementing encoder/decoder modules for location references.
• Digital map and geographic database vendors who need to expose or consume standardized location references.
• Traffic information service providers (RDS/TMC, TPEG) and broadcasters packaging location‑referenced messages.
• Navigation system vendors and telematics providers requiring interoperable location linking between databases.
• Standards bodies and integrators evaluating interoperable LRM approaches.

Practical benefits include improved interoperability between map databases, efficient encoding for real‑time traffic and event messaging, and standardized exchange of location‑specific ITS data.

Related standards

• ISO 17572-1: General requirements and conceptual model
• ISO 17572-2: Pre‑coded location references (pre‑coded profile)
• ISO 14825 and other ITS data standards referenced by ISO/TC 204

Keywords: ISO 17572-3:2015, dynamic location references, ITS, location referencing method, TPEG2, geographic database, encoding rules, logical data model, compressed data format.