Interoperability in GSDI: Standards, Solutions, and Futures

1. Interoperability in GSDI: Standards, Solutions, and Futures Douglas Nebert GSDI Secretariat

2. Workshop Agenda • 14:00 Introduction (Nebert) • 14:10 International Standards ISO TC 211 (Ostensen) • 14:35 OpenGIS Consortium Specs (Reichardt) • 15:00 National Community Standards (Nebert) • 15:20 Break

3. Agenda, Continued • 15:30 Geographic Information for Sustainable Development (Bacharach) • 16:00 Australian SDI: Support for National to Local Interests (Kelly) • 16:30 Standard Components for Developing SDIs in Spain (Zarazaga) • 17:00 Implementing ISO 19115/23950 (Danko)

4. Interaction of Standards Authorities • Many standardization activities exist with different roles and responsibilities that are relevant to implementing SDIs: • International Organisation of Standards (ISO TC 211, TC 204, JTC-1) • World Wide Web Consortium (W3C) • OpenGIS Consortium (OGC) • National Standards Organizations

5. Software interfaces (Implementation Specifications) Regional SDI Coordination Endorsed practices and specifications OpenGIS Consortium, W3C Other NSDIs SDI ISO TC 211 National Standards Content standards, Authority for data Foundations for implementation. (Abstract standards) Community Standardization GSDI

6. Standards Stack

7. National/Community Interest Standards Doug Nebert GSDI Secretariat

8. Scope of National Solutions • Data Content Standards • Geographic Location Gazetteer • Geodetic Reference Systems • Feature Type Catalogs • National Information Profiles of International Standards • Data Policies and Laws

9. Data Content Standards • Specify semantics and syntax for information exchange for a specific theme of data • May define core or comprehensive “packaging” of spatial data • May be expressed as an ISO Application Schema • Supports usage in OGC interfaces

10. Interoperability based on a common data model for data exchange Common Content Model import export Mission System 1 API Mission System 2 API Core Framework Encoding export import API Mission System 3

11. Common Elements • Feature types (classes) included • Unique feature identifier system • Basic attributes • Controlled vocabulary, codes, authorities • Valid at a range of scales and resolutions • Multiple representations of same features possible

12. Community 6. Forward Committee Draft to National Review and Approval 3. Review Application- Neutral Content Model 1. Requirements Encoding (XML) 2. Design Modeling Advisory Team Design Process 4. Comments 5. Refine

13. Standards Process for Geospatial One-Stop Requirements Team Extract data requirements Portal Team Standards Teams FGDC Endorsement Compose/ convene 7 MATs Write draft std docs Extract common data requirements Construct Draft Model Construct Draft Standard Vote at ANSI INCITS L1 Vote at ANSI revise revise Public Review Public Review Calls for requirements and participation

14. Generalized Modeling Approach Universe of Discourse (each of 7 communities) Conceptual Model Feature Model in UML expert intervention Conceptual Model using ISO 19118/19103 objects in UML Application Schema UML-XML encoding transform Common Community Data Transfer in XML-Schema (GML) Data Transfer Schema XML validation Encoded Feature Data in XML

15. What is the Geospatial One-Stop Portal? • Middleware that integrates access to distributed community data services • Community-wide access point for all participating data and map services • Employs standard software interfaces to connect to catalog, map, and feature services set up by providers • Generic user interface that could be adapted by other communities

16. Web Browser (Thin Client) Applications (Thick Client) Internet Geospatial One-Stop Portal User Interface Widgets @FGDC Analysis Symbols Help GNIS Gaz WFS WMS WCS Cat Clients Internet Services Data Provider Organizations Portal Concept

17. Framework Interoperability Pilot for Transportation • OpenGIS Consortium (OGC) will assist in modeling process to define proper UML that conforms to ISO rules and can be implemented as GML • Engage OGC members in implementing Web Feature Services to extend multiple available data systems (U.S. and Canada) • Demonstrate a Web client that can display and query multiple Framework data sources based on a common data model • Approach to be followed for other themes

18. OGC Web Feature Service WFS Mission System A Web Feature Browser/ Client Application translation utilities GML (XML) Native Format Mission System B WFS P B private schema public schema transformation rules

19. Geographic Location Gazetteer • Names of geographic places should be identifiable with unique IDs for easy reference and usage • First-order Subdivision (Province) • Second-order Subdivision (District) • Populated places • Named landscape features • Establishment of online gazetteer by each nation is a useful service

20. Geographic Name Resolution (OGC Gazetteer Profile of WFS) • Online service protocol is being developed to query geographic name servers to assist in relevant place name and coordinate assignment • Metadata collection (cataloguing) can benefit from access to Web service to encode place as name and coordinates • Geospatial search will benefit from stronger match of place to coordinates

21. Place Name and Context Structure Request may include ambiguous place type and name or coordinate Response should include context but must include spatial coordinates Gazetteer Interaction User Web-based application Gazetteer Service

22. Place Name and Context Structure Metadata Encoding User Gazetteer Service Metadata Encoding System

23. Place Name and Context Structure Metadata Search Support User Gazetteer Service Metadata Search System Metadata (Catalog) Servers

24. Geodetic Reference Systems • Selecting and conforming to a national or trans-national horizontal and vertical datum • Many new systems consistent with geoid-based solutions (useful with GPS) • Ability to also report data in geographic (latitude, longitude, decimal degrees) helpful in regional-global analysis

25. Feature Type Catalogs • Development of national online catalog for “well-known” classes of features and attributes: • Definition • Authority • Relationships • ISO has feature cataloguing methodology to assist in solution

26. National Information Profiles of International Standards • ISO standards are typically adopted by national members as National Profiles • Profiles permit clarification, localization, and extension of ISO content • Coordination or common adoption of multi-national profiles is desirable

27. Examples of Profiles • Metadata • Feature Catalogue • Application Schemas

28. Data Access Policies and Laws • Review existing Information Technology legislation and policies • Establish data exchange policies • Address privacy, intellectual property, and security issues • Define terms of participation in national SDI environment

29. GSDI-6 Pre-conference Workshop:Standards in Action Douglas Nebert GSDI Secretariat

30. Agenda, Continued • 16:00 Geographic Information for Sustainable Development (Bacharach) • 16:30 Australian SDI: Support for National to Local Interests (Kelly) • 17:00 Standard Components for Developing SDIs in Spain (Zarazaga)