Technology for Spatial Data Infrastructures

  • View
    28

  • Download
    0

Embed Size (px)

DESCRIPTION

Technology for Spatial Data Infrastructures. Werner Kuhn Slides by Michael Gould. The 3 functions of GIS. Spatial data Input/editing. Query + Analysis. Presentation. End user. productivity. Novel paradigm: web mapping. Central server. Spatial data Creation. Query + analysis. - PowerPoint PPT Presentation

Text of Technology for Spatial Data Infrastructures

  • The 3 functions of GISSpatial dataInput/editingQuery + AnalysisPresentationEnd userproductivity

  • Novel paradigm: web mappingSpatial dataCreationQuery +analysisPresentationLight client (browser)UserCentral serverDB- new economic model: centralization AND decentralization

  • www.mapa.es

  • Status quoMany web map servers (WMS) available to publicCreation of islands of information accessEach map server in a separate browser window...often impossible to combine layers

  • WebMapping Testbed (WMT)Proof-of-concept project, October 1999, connecting heterogeneous servers and clients (multi-vendor)A test of collaboration among various companies and agenciesRetrieve data in data servers in various nations, from various clientsDataDataDataServerServerServer Web Clientstandards, Interfaces

  • OGC Web Mapping Testbed (WMT)

  • before WMTTerraServer - http://terraserver.microsoft.comMapQuest - http://www.mapquest.comEPA - http://www.epa.gov/enviro/enviromapper.html

  • Interoperable Web MappingServer 1Server 2Server 3Data HoldingsCoverage areasMap ProjectionFormatsCost/PoliciesData HoldingsCoverage areasMap ProjectionFormatsCost/PoliciesData HoldingsCoverage areasMap ProjectionFormatsCost/PoliciesCatalog ServiceSource: Digital Earth, NASA

  • Interoperable Web MappingTopography?Water?Boundaries?Catalog ServiceServer 1Server 2Server 3Server 1: TopographyServer 2: WaterServer 3: BoundariesSource: Digital Earth, NASA

  • MetadataInternal descriptive information that makes the geodata usefulConvergence on ISO modelProposal of Consejo Geogrfico NacionalNational profile (IDE-E) of ISO19115 + elements from wider model (Dublin Core)Software to create/edit metadata is already available, free software

  • Metadata describing servicesMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URLMetadata for an online service, and a URL ..

    Catalog services Application servers with Metadata and OpenGIS interfaces

  • SDI technology: complicated

  • SDI technology: simplifiedSource: NASA, 2001

  • Novelty of WMTDefine interfaces: standard-based software plugsTo connect to servers: WMS, WFS, WCS....From diverse client softwareServer continues to be optimized for its users, but ALSO may cooperate as a node in a heterogeneous network of serversGIS for me GIS for me, AND also partially accessible to others, if they are interested

  • ConclusionsThe technology for sharing geoinformation exists, and has been demonstratedBased on international standardsAvailable to the publicIndependent of commercial brand names

    Now, we need to apply the technology...