Publishing clearinghouse resources to geodata gov
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Publishing Clearinghouse resources to Doug Nebert FGDC Secretariat Geospatial One-Stop Team September 17, 2004. NSDI: a Foundation for GOS. Geospatial One-Stop (GOS) implements the principles of the NSDI spelled out in Executive Order 12906 (recently revised)

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Publishing clearinghouse resources to geodata gov l.jpg

Publishing Clearinghouse resources to

Doug Nebert

FGDC Secretariat

Geospatial One-Stop Team

September 17, 2004

Nsdi a foundation for gos l.jpg
NSDI: a Foundation for GOS

  • Geospatial One-Stop (GOS) implements the principles of the NSDI spelled out in Executive Order 12906 (recently revised)

  • GOS builds on the resources already available in the NSDI – FGDC and endorsed external Framework Standards, NSDI Clearinghouse Network

  • Operated as project coordinated through FGDC Secretariat with many agency partners

Geodata gov and the nsdi clearinghouse l.jpg and the NSDI Clearinghouse

  • Over 150 collections of metadata exist within searchable NSDI Clearinghouse Nodes in the US

  • All FGDC metadata records are searchable by fields and full-text through six replicated search gateways

  • Additional non-Z39.50 metadata collections exist that should be part of the NSDI via

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Some operational features

  • will speed and simplify search and browse of metadata as a replacement for the domestic NSDI Gateways

  • Metadata are harvested from remote collections into a single metadata ‘cache’ to speed search and ranking

  • Browsing for geospatial data is made possible through common ISO Categories

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Portal at

  • OGC Web Map Services (WMS) and ArcIMS ‘image’ services supported in viewer where links provided in metadata (Online_Linkage)

  • Data, map services, static maps, and applications are among the resource types indexed

  • Channels (thematic communities) post selected browseable content

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How do I publish?

  • Before you can publish metadata in, you need to register as a publisher

  • After your registration is completed, you will have username and password to access the portal as a publisher

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1. Start registration: Login

2. Register online

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4. Receive e-mail and confirm registration

3. Complete user account information

5. Read and accept publisher agreement

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Current Publication Options

  • Users may contribute metadata one of three ways:

    • Enter FGDC metadata into a form at and they are stored and indexed there

    • Upload metadata as FGDC XML to the site

    • Register their existing metadata collection to be harvested into the GOS metadata repository

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map services





map viewer



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Data Entry Form

If you do not have any FGDC metadata and anticipate only a few records to be published to you can use an online entry form to collect abbreviated FGDC metadata that will be hosted at

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Upload XML Metadata

If you have access to a metadata editor such as ArcCatalog but do not have a Z39.50 server or ArcIMS Metadata Server you can upload a small set of FGDC metadata to

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Help files Explorer 6+)

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Metadata Validation Explorer 6+)

Derived values,

for example resource type (Live Map, Downloadable Data…)

Valid values for minimum FGDC:


In your FGDC Online_Linkage field:

For a OGC Web Map Server, enter: http://myserver/ms?VERSION=1.1.0&REQUEST=getmap&LAYERS=roads

For an OGC Web Feature Service, enter:


For an ArcIMS image service, enter:


For an ArcIMS feature service, enter:


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Harvesting Option Explorer 6+)

  • If you have or would like to maintain a collection of metadata at your site and can let know its location, can ‘harvest’ or fetch new and updated metadata to make it searchable

  • You can describe any type of resource (planned data activity, existing data, a map service, an application, etc.) using your published set of metadata

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Harvesting options Explorer 6+)

  • A provider wanting to have content harvested into in can register:

    • Z39.50 “GEO” Metadata server (NSDI Clearinghouse Node)

    • ArcIMS Metadata Server

    • OAI-PMH (Open Archives Initiative, Protocol for Metadata Harvest)

    • Web Accessible Folder

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Harvesting capabilities Explorer 6+)

  • Harvesting is a scheduled retrieval of metadata from a remote collection, such as an existing Clearinghouse Node

  • The harvester detects new content and brings it into a metadata ‘cache’ at for inclusion in search

  • Scheduling can be established in the registration profile of each provider

If you have a z39 50 clearinghouse node l.jpg
If you have a Z39.50 Clearinghouse Node Explorer 6+)

  • If your metadata collection is served on Z39.50 (such as Isite), you need to implement the newest version of Isite (2.10)

  • Update version for Isite is available at:


  • Other brands of Z39.50 software (Compusult, Intergraph, ESRI, Blue Angel) will be implementing the new features for harvest in coming months

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Web Accessible Folder Explorer 6+)

  • Simplest option for publishing moderate numbers of metadata records (<1000) from an organization

  • Create browse-enabled web directory (directory listing view, no default.htm or index.html file present) with FGDC XML and optionally HTML records present

  • Register organization and WAF location with

  • Initial harvest pulls all content, subsequent harvests pull only changed content based on file time-stamps

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Inclusion Strategy Explorer 6+)

  • FGDC Staff has been working on an outreach and ‘inclusion’ schedule to get all domestic Clearinghouses (Z39.50 and otherwise) from State/Local, Federal, and Commercial sources

  • Encourage partnerships and community networking to include as many resources as possible

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Summary Steps Explorer 6+)

  • If you have FGDC metadata, get it in XML form and register as a publisher

  • Evaluate a crosswalk of your theme keyword values with ISO Categories

  • Insert map service and/or download URLs in your Online_Linkage fields – you may have multiple onlinks!

  • Consider an upgrade of software or change of protocol to be more efficient in your services

  • Depending on your site: register to be harvested, use form to enter individual records, or upload multiple XML files

  • View and test your resources once the registration and publishing is processed using the viewer

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Metadata harvest counselors Explorer 6+)