Open GIS background and concepts Why Open GIS
Open. GIS background and concepts
Why Open. GIS? • Extend Open Systems benefits to GIS • Achieve “inter-operability” between systems, data, functionality • Establish a “common language” and “unified model” for GI © 1998 UNIGIS, portions © 1997 OGC Inc.
Open. GIS benefits • Integration with component computing standards • Quick and efficient development cycles • Avoid data transfers and redundancies • Protect investments - future proofing © 1998 UNIGIS, portions © 1997 OGC Inc.
Definition of Open. GIS® • Open. GIS – Open and interoperable geoprocessing, or the ability to share heterogeneous geodata and geoprocessing resources transparently in a networked environment. “The highest level of the interoperability specification. ” • Open. GIS Specification (“OGIS”). A software specification that enables geodata sharing and geoprocessing interoperability. An interface standard for interoperable geoprocessing. • Open GIS Consortium, Inc. A member-based consensus forum dedicated to the development of Open. GIS technologies and the integration of geoprocessing into enterprise computing. © 1998 UNIGIS, portions © 1997 OGC Inc.
Technology Development Overview • Develop technical specifications for interoperable geoprocessing – Develop an Abstract Specification that is independent of computing platforms • Becomes more comprehensive over time – Map this one specification to Implementation Specifications particular to computing platforms • Completed in stages, by functional capability • May introduce Abstract Specification changes – Maintain and revise specifications as needed © 1998 UNIGIS, portions © 1997 OGC Inc.
Technology Development Approach Implementation Specification Development Open. GIS Abstract Specification Implementation Specification Schedule of developments © 1998 UNIGIS, portions © 1997 OGC Inc.
The Open. GIS Abstract Specification • Current version has an Overview and 14 topics • New topics are on the way. . . • The Topics: 1. Geometry Structures 2. Spatial Reference Systems 3. Locational Geometry 4. Stored Functions/Interpolation 5. The Open. GIS Feature and Feature Collections 6. The Coverage 7. The Earth Image 8. Feature Relationships 9. Quality 10. Transfer Technology 11. Metadata 12. Services Architecture 13. Catalog Service 14. Semantics and Information Communities © 1998 UNIGIS, portions © 1997 OGC Inc.
Open. GIS Specification Enables Transparent Access to Heterogeneous Geodata Interfaces based on the Open. GIS Specification File Format NETWORKS AND CLIENT/SERVER TECHNOLOGY File Format Traditional DBMS File Format Nontraditional DBMS File Format Real-Time Data Feed File Format © 1998 UNIGIS, portions © 1997 OGC Inc.
The Migration from Traditional GIS Yesterday Future Application Monolithic GIS Proprietary or Generic DBMS Connection Application Proprietary APIs Application Open APIs Spatial DB Middleware Application Services Traditional DBMS Universal Server(s) (spatiallyaware) © 1998 UNIGIS, portions © 1997 OGC Inc.
The Goal of Open Geoprocessing DATA RESOURCES Cadastral Water resources Land Use Zoning Highway Traffic Transit Water supply Sewer Storm drains Gas & electric Telecom. lines Political Surface geology Hazards Public safety Population Real-time feeds Earth imagery PRECESSING RESOURCES GIS Earth Imaging CAD Mapping GPS Navigation Facilities Mgmt. Database software OODBMS RDBMS Universal server. . . Desktop publishing Document imaging Workflow Decision support USERS Industry Markets Utility Companies Telecom Civil Engineering Niche Integrators Petroleum Intelligent Transport Public Markets Environment Resources Mgmt Infrastructure Urban Planning Disaster Relief Public Safety IVHS Business Markets Real Estate Insurance Banking © 1998 UNIGIS, portions © 1997 OGC Inc.
Open. GIS: Dynamic Interoperability Database Server Database Client catalogs schema coord system geodata representation Requests, Features, & Collections CORBA - OLE/COM © 1998 UNIGIS, portions © 1997 OGC Inc.
Architectural Layers in a GIS Presentation Component Ware Application Distributed Objects Application Server Metadata and Query I/F Database Server © 1998 UNIGIS, portions © 1997 OGC Inc.
Managing the Geospatial Library G/NSDI OMG Stakeholders OGC WWWC ISO FGDC Sister Disciplines © 1998 UNIGIS, portions © 1997 OGC Inc.
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