Mining For Lost Treasure National Geospatial Data Clearinghouse Archibald Warnock U.S. Federal Geographic Data Committee A/WWW Enterprises
What is Clearinghouse? zDistributed service to locate geospatial data based on their characteristics expressed in metadata zClearinghouse allows one to pose a query of all or a portion of the community in a single session zLike a spatial AltaVista
Components of Clearinghouse zThere are three functional areas that interact to create the Clearinghouse: yMetadata preparation and indexing yMetadata service yUser Access via Gateway forms
Clearinghouse Method Metadata preparation Metadata validation/ staging Metadata publication User access
Clearinghouse Design zThe Clearinghouse in its distributed form includes a registry of servers, several WWW-to-Z39.50 gateways, and many Z39.50 servers zA primary goal of Clearinghouse is the ability to find spatial data throughout the entire community, not one site at a time
Essential Configuration FGDC Gateways Web Client Web Client Node Clearinghouse Sites
User downloads query form FGDC Gateways Web Client Web Client Node Clearinghouse Sites
User sends query to web server FGDC Gateways Web Client Web Client Node Clearinghouse Sites
Gateway passes query to Clearinghouse Servers FGDC Gateways Web Client Web Client Node Clearinghouse Sites
Gateway receives and collates response as list of “hits” FGDC Gateways Web Client Web Client Node Clearinghouse Sites
Client receives results summary as HTML by default FGDC Gateways Web Client Web Client Node Clearinghouse Sites
Client can request a specific metadata record for viewing FGDC Gateways Web Client Web Client Node Clearinghouse Sites
Node in More Detail MetadataIndex/DB Z39.50 server InternetData
Metadata Solutions zNumerous software solutions available zCommercial and free-ware zStandalone, DB-linked, GIS-linked zPermit collection and structuring of FGDC- compatible metadata zPresent metadata as HTML, XML, or text
Server Solutions zZ39.50 Protocol is used z“GEO” Geospatial Metadata Profile is published for Z39.50 implementors to understand FGDC metadata structures zSupports search across numeric, text, date, and spatial extent and full-text zFreeware and commercial solutions
Gateway in more detail Nodes Gateway Web server interface Z39.50 clients Web Gateway Case Web client Web client
User Interfaces zHTML-based forms hosted at Gateways are the primary access method zJava map-based interface from MEL allows more sophisticated search zInclusion of search capabilities in GIS client software is possible
Who’s in Clearinghouse? z109 Nodes (servers) online as of 3/1/99 y28 Federal, national scope y35 State/University state-wide scope y28 International scope or location y18 Local or Regional scope
Federal Participation zNOAA (10) zUSGS (6) zFEMA (sampler) zNRCS climate and soils zCIESIN/EPA zCIESIN/NASA zDOT NTAD z National Park Service z Army Corps of Engineers z Tri-Services Center z National Wetlands Inventory z Census (sampler) z Minerals Management Service
State Participation zNew York (2) zNorth Carolina zOklahoma zKansas zTexas zMontana (3) zVermont zPennsylvania z West Virginia z Washington z Wisconsin z Wyoming (2) z Florida z Alabama z New Mexico z Arizona zGeorgia zIllinois zMinnesota zAlaska zCalifornia zDelaware zNebraska (2) zNew Jersey
Regional/Local Participation zMcKinley Co, NM zCity of Santa Fe, NM zNorth Texas GIS zResearch Planning zSabine R Authority, TX zSan Francisco Bay zS Florida Ecosystem zSW Natural Resources z Olympic Peninsula, WA z Greater Yellowstone z Helena NF z Ecological Reserves, KS z MIT/Mass Boston DOQs z Great Lakes EIS z Eastern Sierra
International Participation zNOAA/Japan GOIN zSouth Africa (2) zESA AVHRR sampler zGELOS, Italy zPAIGH, Mexico zS57 Hydrography, Canada zNRL MEL zAfrica DDS z Inter-American Geospatial Data Network z Hong Kong z CIESIN/USDA Global Environmental Change z Australia (10+) z Costa Rica z Caribbean CEPNET, Jamaica
Planned or Funded Nodes zMt Desert Island, ME zSW Washington COG zNASA GCMD zCODEPLAN, Brazil zIowa zMissouri zKentucky z South Dakota z Oregon z Louisiana z Ohio z Connecticut MAGIC z Colorado z NW Ecosystems
88 Independent Nodes? NSDI One Common Access Method
For more information: Visit the FGDC website: Contact the Clearinghouse Coordinator, Doug Nebert