What is ISO 17572-4 about?
ISO 17572-4 describes and lists the characteristics of the Precise Relative Location Referencing Method (PRLRM) which describes precise relative locations in the context of geographic databases and is used to locate transport-related objects in an encoder system as well as in the decoder side.
ISO 17572-4 specifies PRLRM, comprising:
Conceptual data model for Location Referencing Methods
Specification of location referencing for precise relative information