Lee Alexander, Univ' of New Hampshire

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The Next IHO Digital Data Transfer StandardS-100

• Lee Alexander, Univ. of New Hampshire
• Barrie Greenslade, UKHO

2
Background

• IHO S-57 is the current IHO Transfer Standard
  for Digital Hydro Data
• Formally adopted in 1992 at XIVth IHC
• Edition 3.0 (Nov 1996)
• Edition 3.1 (Nov 2000)
• No changes currently frozen

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Current Limitations of S-57 3.1

• Primarily developed as a transfer standard to
  meet all Hydrographic requirements, but in
  reality has been limited to ENC and a couple of
  derivatives.
• Has an inflexible maintenance regime
• Cannot support future requirements
• Embedding data model within encapsulation
  restricts flexibility

4
For the next Standard

• Goal support a greater variety of
  hydrographic-related digital data sources,
  products and customers.

• Next Generation ECDIS
• Web-enabled Functionality
• Digital Nautical Publications
• Enhanced bathymetric products
• Data fusion
• AMLs, MIOs, Inland ENC, etc.

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Other Objectives

• Separate data content from carrier
• Multiple products/exchange formats (XML, GML and
  even ISO/IEC 8211
• Manageable flexibility that can accommodate
  change
• Extensibility is the key, product specs will have
  to be inclusive not exclusive
• Facilitate interoperability with other GIS
  standards
• Data fusion
• Separate registers for other user communities
• Not only features, but meta, symbology etc.

6
ISO Geospatial Standards

• International Organization for Standardization
  (ISO)
• Technical Committee 211 (ISO/TC211)
• Deals with geo-spatial standards
• 22 Class A Members
• IHO
• DGIWG
• OGC
• Etc.

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S-57 Ed 4 ? S-100

• Next IHO Data Transfer Standard will be called
  S-100
• Many regard S-57 to be the same as the ENC
  Product Specification
• Need to avoid confusion about the next data
  transfer standard
• S-57 Ed. 4 ? to S-100 name change decided at IHO
  CHRIS 17 (Sep 05)
• Planed to be available late 2007

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New Framework

• S-100 will follow ISO/TC211 way of standards
  development
• Registry with registers
• New spatial components (3D)
• Temporal/real-time functionality
• Imagery gridded Data
• Simple features for WFS WMS
• Wider based Meta component
• New Encoding XML/GML, BAG, SVG

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ISO 19100 Standards
Geographic Information Services
Geographic Information

Profiles
Data Administration
Data Models Operators
Information Technology
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Registry with Registers
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Application Schema Template
12
Product Specifications
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Benefits of S-100 Approach

• Using ISO components/terminology in mainstream of
  geospatial info industry
• Conformance with ISO/TC211 standards will
  maximize use of SCOTS software applications and
  development
• New S-57 components/extensions will not be
  developed in isolation
• New requirements can be incorporated within
  established framework of ISO TC211 standards
• S-57 no longer considered a standard just for
  hydrography
• Will facilitate HOs to use other sources of
  geospatial data

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Progress to Date

• In progress
• 1D/2D Spatial Component CD
• Imagery and Gridded Data CD
• Registry Component FD
• Inland ENC will be the Testbed Register
• Meta Component FD
• 3D Spatial Component FD
• Coordinate Reference Systems WD
• Next priority components
• Application schema template
• GML schemas

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Summary

• S-100
• Not an incremental revision of S-57 3.1
• A new standard that includes additional content
  and support of new data exchange formats
• Enable the use of web-based services
• Primary Goal Support greater variety of
  hydro-related digital data sources, products, and
  customers (e.g., Inland ECDIS/ECS)

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Two Main Tasks for IEHG

• Now that the IENC Encoding is completed...
• Process required to maintain/update IENC Encoding
  Guide
• Establishing an Inland ENC Register
• Initially on the Open ECDIS Forum
• In accord with the IHO Registry