CGDI Current Architecture and Standards Interoperability Day

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CGDI Current Architecture and StandardsInteropera
bility Day
Peter Schut, April 20, 2007
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Agenda

• Who does what?
• State of the CGDI Architecture
• Looking ahead

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Architecture Advisory Committee

• Responsible for maintaining the architecture
• Newly formed in GeoConnections II
• First meeting last month
• replaces CAWG (2001-2005)
• Consists of representatives nominated by IACG and
  CCOG

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Architecture Components

• Documentation
• Target Vision
• Architecture Description
• Developers Guide
• Access Control
• Redundancy and Reliability
• Framework Data
• Endorsed Standards
• Reusable components
• Coordinating Systems

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Standards

• Describing Geospatial Resources
• Publishing and Discovering Geospatial Resources
• Visualizing Geospatial Data
• Accessing Geospatial Data
• Manipulating Geospatial Data

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Agenda

• Who does what?
• State of the CGDI Architecture
• Looking ahead

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Levels of Endorsement

• Endorsed
• Must be used in order to comply with CGDI
• Recommended
• Should be used
• Discussion Paper
• Should be considered
• Other ideas
• Informative

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Describing Geospatial Resources

• Metadata for Geodata   
• Catalog Services Interface (Recommended)
• Service Registry (Recommended)

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Metadata for Geodata

• Currently using the FGDC Content Standard for
  Digital Geospatial Metadata
• Widely adopted and successfully implemented
• ISO 19115 (North American profile) is emerging

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Publishing and Discovering Geospatial Resources

• Geodata Discovery Service
• Catalog Services Interface (Recommended)
• Service Registry Service (Discussion)

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GeoData Discovery Service

• Currently using the Z39.50 Application Profile
  for Geospatial Metadata (GEO 2.2)
• Widely adopted and successfully implemented
• OGC Catalog 2.2 profiles emerging

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Visualizing Geospatial Data

• Web Map Service (WMS)
• Web Map Context (WMC)
• Styled Layer Descriptor (SLD)
• Filter Encoding
• Web Feature Service (WFS)
• Geolinked Data Access Service (Recommended)
• Geolinking Service (Discussion)
• Gazetteer Service (Discussion)

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Web Map Service (WMS)

• Currently version 1.1.1
• Widely adopted
• Some issues (legends)

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Web Map Context (WMC)

• Currently version 1.0
• Limited adoption
• Continuing to evolve

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Styled Layer Descriptor (SLD)

• Currently version 1.0
• Very limited adoption

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Filter Encoding

• Currently version 1.0
• Very limited adoption
• Competing specifications (SQL, XQuery)

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Web Feature Service (WFS)

• Currently version 1.0
• Limited adoption
• Barriers to implementation
• Performance

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Accessing Geospatial Data

• Web Feature Service (WFS)
• Geographic Markup Language (GML)
• Filter Encoding
• Geolinked Data Access Service (Recommended)
• Geolinking Service (Discussion)
• Gazetteer Service (Discussion)

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Geographic Markup Language (GML)

• Currently version 2.2
• Version 3.2 released
• Limited adoption
• Barriers to implementation
• Complexity
• Lack of Profiles

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Manipulating Geospatial Data

• Web Feature Service (WFS)
• Web Processing Service (WPS) (Discussion)

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Agenda

• Who does what?
• State of the CGDI Architecture
• Looking ahead

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Gazetteer service (recommended)

• Made in Canada
• Significant adoption
• Emerging OGC standard is different

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Geospatially-linked Data Access Service
(recommended)

• Currently version 0.9.1
• Version 0.10.2 available
• evolving rapidly
• Limited adoption

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Geospatial Linking Service (discussion)

• Currently version 0.9.1
• Version 0.10.2 available
• evolving rapidly
• No adoption

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Web Processing Service (discussion)

• Currently version 0.4.0
• Version 1.0 emerging
• Limited adoption
• Profiles needed

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Catalog Services Interface (recommended)

• Currently version 2.2
• Limited adoption
• Competing profiles (ISO, ebRIM)

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Service Registry Service (discussion)

• Dated
• No adoption
• Still useful

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OTHER EMERGING TECHNOLOGIES

• GeoRSS
• Sensor Web
• OWS Context
• Tile Mapping