1. www.geongrid.org Glossary WMS – OGC Web Mapping Services WFS – OGC Web Feature Services XML- Extensible Markup Language OGC – Open GIS Consortium ADN – Alexandria DLESE NASA GETIMAGE – WMS request to extract map from the WMS server GETCAPABILITIES – WMS request to get the metadata about the service GUI – Graphical User Interface Non-hosted – datasets available on the remote servers exposed through OGC compliant WMS/WFS services Extending GEON registration and map assembly services to support non-hosted WMS-compliant spatial data servers Ashraf Memon, Ghulam Memon, Ilya Zaslavsky San Diego Supercomputer Center Standards based map integration (WMS, WFS based mapping) Ontology based data registration Knowledge based information integration Composite map generation to non-hosted datasets USGS (http://seamless.usgs.gov) NASA (http://wmt.jpl.nasa.gov) WMS Map Assembly Service WMS Map Assembly Portlet/Viewer Envelope Layers Interactive Client Type XML result URL Website Creator Image Fusion Service WMS Servers Knowledge Based WMS Registration (Item Detail Level) WMS Server WFS Server 1.WMS URL 2.WFS URL GET_CAPABILITIES GET_VALUES (fields) Ontologies and Concepts 1.WMS URL 2.WFS URL 3.Dataset Name 4.Ontology 5.Concept Value Map Compile REGISTER WMS Registration Service WMS Registration Portlet GEON Metadata Catalogue WMS service is a collection of spatial data layers. To make the WMS service layers available to the community through GEON, the service needs to be registered with the GEON registration system. Metadata Requirement URL to WMS Service ADN Metadata Spatial Envelope Other Dublin Core Item Level Ontology Mapping WMS Registration Service API registerWMS( URL, ADNXML, OntologyMappingXML ) URL: URL to WMS Service ADNXML: XML defining ADN Metadata OntologyMappingXML: xml defining WMS dataset to Ontology, sample Client Portlet Map Integration Portlet (Mediator) Map Integration Portlet (Mediator) Geon Dataset Ids Gridsphere Ontology Service OGC Query Service Mapping /Fusion Services Webservices 1.Dataset Ids to Dataset Names 2.Dataset Ids to Ontology Ids 3.Ontology Ids to Ontology Names 4.Ontology Ids to Ontology Concepts Ontology Engine WMS Server Knowledge Representation Redefine Query Mapping Execute Query Query Result Indexing Generate Map WMS Server URL: Interactive ADN metadata entry (For Each Service) Ontology Mapping Interactive GUI (For Each Service) submit GetCapabilities (Spatial Extent etc.) WMS Registration Service registerWMS (URL, ADNXML, OntologyMappingXML) GEON Metadata Catalogue Basic Map Integration Knowledge Based Map Integration WMS Registration (Item Level) GEON Metadata Catalogue Query Tracking Database GEON Metadata Catalog Map Integration MapIntegration Web Service GEON Search GEONSearch Web Service GEON Metadata Catalog GEON Registration registerWMS(URL, ADNXML, OntologyMappingXML) GEONRegistration Web Service GEON Metadata Catalog During the GEON registration process a reference to the WMS service is stored along with the metadata (list of layers, other dublin core type metadata). Item level registration registers the whole dataset to an ontological concept, item detail level registration stores the mapping of the individual values in the database columns to concepts stored in the ontology. Concept mapping information, obtained during item level registration, is used to search for the datasets. Concept map stored during the item detail level registration is used to query the concepts stored as individual values in the datasets columns. Map integration service assembles multiple fragments of the maps received as a result of the GetMap request in to one composite layer, and provides the user with an interactive interface to perform operations like zooming, panning etc on the combined map.