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[TISA-LR-FAQ2]

OpenLR is a map-agnostic, open-source location referencing method optimized for cross-platform data exchange. Its compact format and royalty-free licensing make it especially attractive for use cases involving real-time traffic information and embedded systems. OpenLR provides a robust and cost-effective solution for many ITS and mobility scenarios

Short Summary Answer

OpenLR is a map-agnostic, open-source location referencing method optimized for cross-platform data exchange. Its compact format and royalty-free licensing make it especially attractive for use cases involving real-time traffic information and embedded systems. OpenLR provides a robust and cost-effective solution for many ITS and mobility scenarios.

Why the need for map agnostic location referencing ?

Maps from different suppliers are not exactly the same. 
Differences in geometry, topology, and attributes—such as street names— do occur due to variations in data sources and modeling approaches.

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Accurately matching locations across maps from different providers requires a method that can handle these differences between maps —  such a method is termed a "map-agnostic location referencing method".
Any map-agnostic location referencing must ensure that the intended location can be correctly identified, no matter which map is used to create the location reference and which map is used to match the location reference.

Stakeholder Relevance / Rationale

  • Public Authorities: Ensures interoperability of (open) data on National Access Points towards data consumers and platforms in traffic management and navigation services; cost-effective and aligns with open standards.

  • Content Providers: Facilitates scalable data aggregation across different maps; encoding efficiency supports dynamic updates.

  • Service Providers: Enables consistent service delivery in bandwidth-constrained or multi-map environments; standards with royalty-free licensing avoids vendor lock-in.

  • OEMs: Well-suited for in-vehicle use due to its compact format; supports navigation services and also dynamic updates for ADAS and connected services.

Detailed Explanation

Types / Versions / Formats 

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  • Encoding/Decoding Logic: Requires correct implementation on both sender and receiver sides.

  • Resilience to Map Changes: Uses road topology rather than fixed coordinates, reducing errors when maps differ.

  • Open Tools: Available libraries and encoders/decoders simplify integration.

Decision Guide

NeedOpenLR Fit
Cross-map compatibilityExcellent in all versions
Real-time traffic/event messagingExcellent in all versions
Compact transmission formatExcellent in all versions
Royalty-free, open-source integrationExcellent in all versions
High-resolution polygons or zonesUse ISO TPEG2-OLR, TomTom format has limited support
Off-road or free-form location supportUse ISO TPEG2-OLR, TomTom format has limited support

Implementation Notes

  • OpenLR is based on the WGS-84 coordinate reference system and requires maps to have two attributes: Functional Road Class (FRC, importance of road), Form-of-Way (FoW, type of road).
  • A mapping may be needed from source map attribute conventions to OpenLR conventions. 
  • Use official encoders/decoders to ensure format compliance.

  • Ensure team familiarity with the topology-based referencing model.

  • For more complex POIs or areas, use ISO TPEG2-OLR, or evaluate extensions or hybrid approaches (e.g., OpenLR+).

References & Tools

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