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

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Presentation on theme: "SCAR Feature Type Catalogue Henk Brolsma / Ursula Ryan – Australian Antarctic Division Steffen Vogt – University Freiburg - Germany."— Presentation transcript:

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

2 Chronology Tokyo 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 Catalogue Definition 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 Feature cataloguing Spatial referencing by coordinates Spatial referencing by geographic identifiers Quality principles Quality Evaluation

6 Definitions Structure Symbology

7 Quality ISO Quality principles ISO Quality evaluation Purpose describing quality Quality Attributes

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

9 Data Model: Services

10 Data Model : Feature Types Feature Type Definitions Example Feature

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

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 its a dynamic document


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