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Beyond service interfaces - OGC encoding standards in INSPIRE: GML and SLD/SE

Beyond service interfaces - OGC encoding standards in INSPIRE: GML and SLD/SE. INSPIRE Conference 2011, Edinburgh Workshop “INSPIRE and open standards for sustainable growth “ Clemens Portele, interactive instruments GmbH. Spatial data interoperability in INSPIRE.

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Beyond service interfaces - OGC encoding standards in INSPIRE: GML and SLD/SE

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  1. Beyondserviceinterfaces -OGC encodingstandards in INSPIRE: GML and SLD/SE INSPIRE Conference 2011, Edinburgh Workshop “INSPIRE and open standardsforsustainablegrowth“ Clemens Portele, interactive instruments GmbH Clemens Portele

  2. Spatial data interoperability in INSPIRE • All aspects are necessary for a sustainable infrastructure • Spatial data and data sharing probably the most important ones in a Spatial Data Infrastructure • Interoperability of spatial data supported by harmonised data specifications • Based on ISO 19100 standards • Default encoding is OGC GML • Recommended encoding for portrayal rules and symbolisers is OGC SLD/SE INSPIRE Directive 2007/2/EG Spatial Data Metadata Network Services DataSharing Monitoring & Reporting Clemens Portele

  3. Spatial data interoperability in INSPIRE Clemens Portele

  4. Spatial data interoperability in INSPIRE INSPIRE application schemas (UML using ISO/TS 19103, ISO 19109, and the INSPIRE Generic Conceptual Model) ISO 19100 profile (UML using ISO/TS 19103) Conceptual level ISO 19107 profile ... INSPIRE GML application schemas (XML Schema) GML, GMD, etc. schema (XML Schema) Implementation level (exchange) Transformation rules for data in download service Data base schema for spatial data (typically RDBMS/SQL-based) Data base meta model Implementation level (database)

  5. Why GML? • Default encoding in INSPIRE • Main reasons: • GML and ISO/TS 19139 provide out-of-the-box encoding rules for large parts of the INSPIRE application schemas - this is not the case for any other commonly used encoding • Provides a standardised encoding for many commonly used types from core standards of the ISO 19100 series • Well integrated with the (candidate) standards of the network services • Provides built-in linking capabilities across data sets or to external dictionaries unlike most other encodings of spatial data • A default encoding rule allows for a coherent encoding approach inline with the overall interoperability requirements of the Directive, but leaves room for other/additional encodings Clemens Portele

  6. GML requirements • GML version 3.2 • Support for complex GML application schemas • In Annex I mostly Simple Feature geometries only • This will change with Annex II/III • Support for XML Schema nil values (implements voidable) • Additional rules with respect to encoding • identifiers • dereferencable links to other features, code lists, etc. • spatial and temporal reference systems Clemens Portele

  7. ShapeChange – in INSPIRE specification process HTML feature catalogues GML application schemas Tool to process application schemas in UML an generate derived representations Published also under GPL Code list dictionaries Clemens Portele

  8. ShapeChange - supports implementing INSPIRE • Excel files to describe mapping tables (ESDIN and other projects) • soapUI test scripts to assert conformance of GML instances against data specifications (ESDIN test framework) • Database model and WFS / download service configurations (XtraServer) Clemens Portele

  9. Styled-Layer Descriptor (SLD), Symbology Encoding (SE) • Portrayal rules and symbology are not a focus of the work in INSPIRE so far (and not really mature as it is!) • To simplify set up of view services and to increase harmonisation of portrayal of INSPIRE data, pre-defined layer/style are needed • Portrayal rules and symbology is one of the candidates identified for INSPIRE registers • OGC WMS/SLD and OGC SE are the normative references in the view service technical guidance for this Clemens Portele

  10. Thankyouforyourattention! Clemens Portele Managing Director  TriererStrasse 70-72, 53115 Bonn, Germany  +49 228 91410 73 portele@interactive-instruments.de Clemens Portele

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