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

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

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)

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

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

Standards Stack

National/Community Interest Standards Doug Nebert GSDI Secretariat

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

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

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

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

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

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

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

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

Portal Concept Clients WFSWMSWCSCatGaz GNIS Internet Geospatial One-Stop Portal User InterfaceWidgets AnalysisSymbolsHelp Web Browser (Thin Client)Applications (Thick Client) Services Provider Organizations Data

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

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

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

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

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

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

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

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

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

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

Examples of Profiles Metadata Feature Catalogue Application Schemas

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

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

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)