Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
PD CEN TR 15449 — Geographic Information Spatial Data Infrastructures
Geographic Information — Spatial Data Infrastructures (CEN/TR 15449)
🗺️ The PD CEN/TR 15449 series is a set of CEN Technical Reports issued in the UK as “Published Documents”, on the subject of Geographic Information — Spatial Data Infrastructures (SDI). An SDI is the set of policies, standards, technologies, and organisational arrangements needed to share, exchange, and use geospatial data — the foundation for cross-departmental cooperation in digital government, smart cities, environmental management, and emergency response. BSI Technical Committee IST/36 (Geographic information) is responsible for UK participation; the reports are drawn up by CEN/TC 287, classified under ICS 07.040 / 35.240.70. The four parts together supersede the earlier PD CEN/TR 15449:2011. This article presents the series as a whole: its structure and technical requirements.
💡 Geodata “each silo its own” is the classic data island problem: inconsistent coordinate systems, incompatible data models, and incompatible service interfaces make data hard to share. CEN/TR 15449 promotes standardisation of SDI through a reference model and best practices, making “data available, services interoperable, domains connected”.
1. Series Overview 📌
The CEN/TR 15449 series is organised around “reference model — best practices — data — services”. The four parts in this batch are as follows:
| Part | Edition | Subject | Main Content |
|---|---|---|---|
| PD CEN/TR 15449-1 | 2012 | Part 1: Reference model | Defines the overall reference model of an SDI, its components, levels, and relationships — the framework basis of the series. |
| PD CEN/TR 15449-2 | 2012 | Part 2: Best practices | Provides best-practice guidance for building and operating an SDI, covering governance, data, services, and interoperability. |
| PD CEN/TR 15449-3 | 2012 | Part 3: Data-centric view | Describes SDI implementation from the data angle (model-driven approach, data specifications, metadata). |
| PD CEN/TR 15449-4 | 2013 | Part 4: Service-centric view | Describes the SDI service system and interoperability implementation (scan version; written from public domain knowledge). |
⚠️ Part 4 (15449-4:2013) is a scan-only file in the source material; its content is summarised from public domain knowledge. Always refer to the official BSI published version.
2. Reference Model and Best Practices 🧩
Part 1 (Reference model) is the framework foundation of the series. It defines an SDI as an organisational, policy, technical, and service complex for geographic information sharing and provides a reference model explaining the components (data resources, metadata, services, standards, governance and institutions, users and communities) and their relationships. The reference model offers a unified conceptual framework for SDIs at different countries and levels, enabling comparison and coordination.
Part 2 (Best practices) provides best practices for building and operating an SDI from an engineering perspective, covering: SDI governance and organisational arrangements, data-sharing agreements and licensing, data quality standards, catalogues and discovery services, deployment of spatial data services (such as WMS/WFS), and establishment of interoperability frameworks. It turns “how to build, manage, and use” experience into actionable guidance.
| SDI Component | Core Content | Related Standards/Guidance |
|---|---|---|
| Data resources | Base geodata, thematic data, geocoding | ISO 19100 data specifications, metadata |
| Metadata and discovery | Catalogues, search, discovery, and browse services | ISO 19115/19119, OGC catalogue services |
| Spatial data services | Map, feature, and coverage services | OGC WMS/WFS/WCS |
| Governance and institutions | Policy, data sharing, institutional coordination | CEN/TR 15449-2 best practices |
3. Data-centric and Service-centric Views 📊
Part 3 (Data-centric view) describes the data implementation of an SDI: use a model-driven approach, defining data specifications and exchange formats per the ISO 19100 series (e.g., ISO 19103 conceptual schema language, ISO 19107 spatial schema, ISO 19109 application schema rules), together with metadata, so that data keeps semantic consistency across departments and regions. The data view also addresses data quality, data updating, and authorisation mechanisms for data sharing.
Part 4 (Service-centric view) focuses on the service-based implementation of an SDI: how to expose geographic information capabilities through OGC/ISO standard services (WMS, WFS, WCS, catalogue, and discovery), how to establish service registration and discovery mechanisms, and how to achieve service interoperability and security. The service view and the data view together form the “data + service” twin tracks of an SDI.
🚨 The worst pitfalls in building an SDI are “heavy construction, light governance” and “heavy data, light services”: building data without services means the data is never used by society; building services without governance means they cannot be sustained. The reference model, data specifications, and service standards must advance together.
4. Engineering Practice 🛠️
- 🏛️ Digital government and smart cities: use the SDI reference model to unify geographic information grounds and support multi-department data sharing in urban governance, planning, and emergency response.
- 🌐 Regional and national SDI construction: formulate SDI construction plans based on the reference model and best practices, building data, metadata, and service catalogues.
- 🔗 Data interoperability: adopt ISO 19100 data specifications and OGC services for spatial data exchange and service interoperability across systems.
- 📋 Governance and sharing: establish data-sharing agreements, licensing, and quality standards per best practices, clarifying data publication and update mechanisms.
5. Frequently Asked Questions ❓
❓ Q: What is a Spatial Data Infrastructure (SDI)?
A: An SDI is the set of policies, standards, technologies, data, and organisational arrangements that support the sharing, exchange, and use of geospatial data, including data resources, metadata, services, governance mechanisms, and institutional coordination.
A: An SDI is the set of policies, standards, technologies, data, and organisational arrangements that support the sharing, exchange, and use of geospatial data, including data resources, metadata, services, governance mechanisms, and institutional coordination.
❓ Q: How does CEN/TR 15449 relate to the ISO 19100 series?
A: The ISO 19100 series specifies concrete standards for geographic information data models, metadata, and services; CEN/TR 15449 is a European-level SDI technical report providing the reference model and best practices for organising these standards into an operable SDI.
A: The ISO 19100 series specifies concrete standards for geographic information data models, metadata, and services; CEN/TR 15449 is a European-level SDI technical report providing the reference model and best practices for organising these standards into an operable SDI.
❓ Q: Why does the “data view” emphasise a model-driven approach?
A: Geodata comes from diverse sources; without unified data models and exchange formats, cross-department and cross-region exchange produces semantic and structural inconsistency. The model-driven approach defines application schemas per standards, ensuring consistent, interoperable data.
A: Geodata comes from diverse sources; without unified data models and exchange formats, cross-department and cross-region exchange produces semantic and structural inconsistency. The model-driven approach defines application schemas per standards, ensuring consistent, interoperable data.
❓ Q: Is this series a mandatory standard?
A: No. CEN/TR are Technical Reports providing reference and guidance and are not mandatory; however, their reference model and best practices are commonly used to guide national/regional SDI construction and are important for engineering decisions.
A: No. CEN/TR are Technical Reports providing reference and guidance and are not mandatory; however, their reference model and best practices are commonly used to guide national/regional SDI construction and are important for engineering decisions.