INSPIRE Annex Testing


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1. Practical Experience of INSPIRE Annex I Testing: Transforming Data into INSPIRE Data Specifications and Making Data Accessible via Download Services<br />Debbie…
  • 1. Practical Experience of INSPIRE Annex I Testing: Transforming Data into INSPIRE Data Specifications and Making Data Accessible via Download Services<br />Debbie Wilson<br /><br />
  • 2. Overview of INSPIRE Testing Call<br />Objectives of INSPIRE testing were to:<br />Understand the feasibility of transforming and publishing data into proposed INSPIRE Annex I data specification<br />Demonstrate ability to access data via INSPIRE Download Services<br />Evaluate costs and benefits of publishing data into the INSPIRE data specification via Download Services<br />89 testing reports were received from 16 Member States from >70 organisations:<br />
  • 3. Overview of INSPIRE Testing Call<br />Only 60 of 89 tests involved full transformation test rest were paper exercise<br />Of those organisations using COTS software ~40% used Snowflake’s GO Publisher Desktop & WFS<br />
  • 4. Snowflake Software’s Experiences <br />Snowflake Software was directly and indirectly involved with 10 organisations across Europe:<br />
  • 5. Transforming Data into INSPIRE Themes<br />Two key approaches are advocated for transforming and publishing data into INSPIRE themes:<br />Offline Transformation: Data is transformed and stored into the INSPIRE data specification (i.e. flat files or separate database)<br />On-the-fly Transformation: Data is stored once and transformed into the INSPIRE data specification on request by the download service<br />Offline transformation may be the most suitable option for datasets that are not updated regularly <br />On-the-fly transformation is most suitable for datasets that are updated regularly and where organisations need to support data access to a wide range end users in different data specifications defined for different use cases<br />Both approaches were evaluated during the testing phase<br />
  • 6. Making INSPIRE Data Accessible via INSPIRE Download Services<br />GO Publisher Desktop, Agent and WFS were also used to demonstrate how organisations can develop download and direct access services <br />INSPIRE Implementing Rules define two types of Download Service:<br />Basic Download Service: Files can be downloaded for local use via HTTP/FTP <br />Advanced Download Service: User can define the extent (geographic, temporal, attribute) of the data they need to be downloaded through either: Data Ordering Services or Web Feature Services (WFS)<br />
  • 7. Demonstration: Transforming HMLR data into INSPIRE Cadastral Parcels <br />Test the feasibility and benefits of using Commercial Off-The-Shelf (COTS) software for INSPIRE<br />Develop the translation without software customisation or development of bespoke scripts<br />Work quickly and productively to reduce costs<br />Refine the translation over several iterations within a limited time period<br />Implement Simple and Advanced Download Services to explore the practical issues of implementing real business requirements<br />On-the-fly translation to avoid replicating database infrastructure <br />Source data from the existing HMLR data model to avoid disruption to existing business processes<br /> “manage once, publish many times”<br />Implement an “industrial strength” solution<br />
  • 8. Defining the Translation: GO Publisher Desktop<br />Database tables and columns<br />XML schema elements<br />Pull down lists populated from the XML schema<br />Preview panel<br />
  • 9. Visualising output: GML Viewer<br />
  • 10. The Solution Architecture<br />
  • 11. Differences between HMLR and INSPIRE data specifications<br />HMLR<br />INSPIRE Cadastral Parcel<br />Land registry dataset<br />No boundaries or index sets<br />Title is the unit of management<br />Only titles have unique identifiers<br />No reference point values<br />Cadastral index model<br />Boundaries & index sets included<br />Parcel is the unit of management<br />Polygons have unique identifiers<br />Reference point geometry allowed<br /><ul><li>Despite these different viewpoints, it is possible to map each component object within a land title to a cadastral parcel.
  • 12. Issues: Managing identity and feature lifecycles as INSPIRE GML application schema requires 3 different identifiers:</li></ul>INSPIRE Identifier <br />National Identifier<br />gmlID<br />
  • 13. Benefits of GO Publisher<br />High productivity was achieved<br />Configuration alone was sufficient<br />No programming or scripting skills were needed<br />Several iterations of the translation were achieved in a limited time-frame<br />Supported progression from simple to advanced services<br />Initially deployed as simple file creation<br />Translation re-deployed as a WFS to support user querying<br />Mature “Industrial Strength” solution<br />Although INSPIRE Quality of Service Requirements were not evaluated in this test, scalability and performance has already been proven in previous deployments<br />The number of independent evaluations and our existing operational deployment base means that the technology is well tested and reliable<br />
  • 14. Benefits of On-the-Fly Translation using GO Publisher<br />Re-use existing database infrastructure<br />Minor disruption to existing business processes<br />Extra translations added at low cost<br />Low initial investment - costs scale with increasing levels of data traffic<br />Example Architecture of an SDI<br />
  • 15. Summary of Key Outcomes and Experiences<br />All organisations using GO Publisher were able to successfully demonstrate that they could transform their data into INSPIRE Annex data specifications<br />However, several issues relating to data transformation and publication were identified by many organisations:<br />Insufficient time to adequately undertake testing (few application tests)<br />Complexities involved in undertaking conceptual mapping of their data model to INSPIRE GML application schema (xsd) or UML model<br />In-experience of staff to transform data from their source format into GML<br />Lack of harmonisation in the way common concepts were modelled and to be implemented in v2.0 (e.g. Identifiers, lifecycle information, naming conventions)<br />
  • 16. Summary of Key Outcomes and Experiences<br />Many organisations identified areas where further work would be needed to better understand how to operationally publish data into the INSPIRE specifications, particularly where this is achieved on-the-fly:<br />Identifier Management<br />Managing feature lifecycles particularly those features generated on-the-fly<br />Translating between different codelist values<br />Measuring and quantifying quality of transformed output (geometric and attribute) to ensure that it is consistent with source data quality levels and other data quality levels<br />Metadata: how can organisations integrate the creation and publication of metadata into operational data management and publication workflows<br />
  • 17. Conclusions<br />A number of technical and business issues exist that need to be addressed at various levels (organisational, inter-agency and Member State)<br />Organisations need to perform more extensive testing to better understand how to incorporate requirements of INSPIRE data specifications into their business processes, datasets, products and infrastructure<br />Responsibility for creation and maintenance of some themes falls across multiple agencies or has been devolved to multiple organisations responsible for a specific geographic region (e.g. transport: road, rail, aviation, water, devolved administrations, local/regional authorities):<br />Need to better understand impact of cross-border/edge-matching issues<br />How can data be seamlessly integrated when combining data from multiple organisations for a single INSPIRE data specification<br />Organisations need facilities to support each other so they can share experiences and ensure everyone can better understand what they need to do to publish their data<br />
  • 18. Questions?<br /><br />For demo of HMLR testing go to: <br /><br />
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