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SCAR Feature Type Catalogue

SCAR Feature Type Catalogue. Henk Brolsma / Ursula Ryan – Australian Antarctic Division Steffen Vogt – University Freiburg - Germany. Chronology. Tokyo 2000 - XXVI SCAR Siena 2001 – Project Coordinators Hobart 2002 – Australia / Germany Shanghai 2002 – XXVII SCAR. AIMS Project.

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SCAR Feature Type Catalogue

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  1. SCAR Feature Type Catalogue Henk Brolsma / Ursula Ryan – Australian Antarctic Division Steffen Vogt – University Freiburg - Germany

  2. Chronology • Tokyo 2000 - XXVI SCAR • Siena 2001 – Project Coordinators • Hobart 2002 – Australia / Germany • Shanghai 2002 – XXVII SCAR

  3. AIMS Project • Scope of the model • Review ISO standards • Produce and distribute draft • Publish as SCAR standard

  4. Feature Type CatalogueDefinition • A feature catalogue is a catalogue containing definitions and descriptions of the feature types, feature attributes and feature associations occurring in one or more sets of geographic data, together with any feature operations that may be applied - ISO 19110

  5. STANDARDS • ISO Standards • 19110 Feature cataloguing • 19111 Spatial referencing by coordinates • 19112 Spatial referencing by geographic identifiers • 19113 Quality principles • 19114 Quality Evaluation

  6. Definitions • Definitions • Structure • Symbology

  7. Quality • ISO 19113 Quality principles • ISO 19114 Quality evaluation • Purpose describing quality • Quality Attributes

  8. Component Model Organisations And People Data Repository Applications Interface Applications Search Species Taxonomy Interface Data Repository Observables Dictionary Ontologies Search Register (using keywords) Feature Type Catalogue Services Catalogue Symbology Metadata Catalogue Map Catalogue Keywords Catalogs

  9. Data Model: Services

  10. Data Model : Feature Types Example Feature Feature Type Definitions

  11. Strong or Weak Typing • Is a feature best described as: GeneralFeature(attribute:type=“Hut”) Or Building(attribute:type=“Hut”, beds=3) Or Hut (beds=3) Or 3 Bed Hut • “Granularity” depends on usage requirements

  12. Name: - unique • Code: • unique- arbitrarily assigned- simple idenfication • - facilitates documentation of changes • External Definition Sources- GEMET (multilingual, UNEP)- other SCAR projects- IHO • ... • Definition: • - should be applicable to Antarctic applications • should be commonly accepted- preferably already established in therespective community • Feature Attributes can by • - mandatory, - conditional (mandatory if applicable) • optionalgeneral Attributes include- geometry (incl. the spatial reference system) • pointer to metadata (incl. data quality) • pointer to SCAR Gazetteer Feature Type Catalogue

  13. Symbology • Portrayal a function of Feature Type • … + attributes • E.g. Building (function=Hospital) • Feature Type Catalogue used to classify entries in symbol libraries • Symbol sets shared +

  14. Advantages • ISO compliant • Common and consistent semantics • Features have common structure • Easy to link to portrayal schemes (symbology) • Easy to create GML schema • Feature Type Catalogue can be used as a classification vocabulary • Fits into the bigger picture of distributed data networks

  15. SCAR Spatial Data Model • it’s a dynamic document • model@aad.gov.au • http://www-aadc.aad.gov.au/gis/model/

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