SCAR Feature Type Catalogue

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SCAR Feature Type Catalogue

• Henk Brolsma / Ursula Ryan Australian Antarctic
  Division
• Steffen Vogt University Freiburg - Germany

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Chronology

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

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AIMS Project

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

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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

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STANDARDS

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

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Definitions

• Definitions
• Structure
• Symbology

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Quality

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

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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
Map Catalogue
Metadata Catalogue
Keywords
Catalogs
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Data Model Services
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Data Model Feature Types
Example Feature
Feature Type Definitions
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Strong or Weak Typing

• Is a feature best described as
• GeneralFeature (attributetypeHut)
• Or
• Building (attributetypeHut, beds3)
• Or
• Hut (beds3)
• Or
• 3 Bed Hut
• Granularity depends on usage requirements

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Feature Type Catalogue
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Symbology

• Portrayal a function of Feature Type
• attributes
• E.g. Building (functionHospital)
• Feature Type Catalogue used to classify entries
  in symbol libraries
• Symbol sets shared

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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

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SCAR Spatial Data Model

• its a dynamic document
• model_at_aad.gov.au
• http//www-aadc.aad.gov.au/gis/model/