Saturday, May 19, 2012

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Association of American State Geologists 

Digital data from all 50 states

The Motivation: State Geological Surveys in the U.S., in conjunction with the U.S. Geological Survey, have thousands of databases, directories, and 85,000+ geologic maps that collectively constitute a national geoscience data “backbone” for research and practical applications. Much of this data is at-risk in its current format (paper records, samples, etc.) or difficult to access.

The Solution: Digitize at-risk, legacy, geothermal-relevant data and combine it with existing digital data to create a publicly accessible system.

The Goal: The National Geothermal Data System (NGDS) will make large quantities of geothermal-relevant geoscience data available to the public by creating a national, sustainable, distributed, and interoperable network of  data providers. The state geological surveys will develop, collect, serve, and maintain geothermal relevant data as an integral component of NGDS.

How it Works: Each participating state data provider will act as a logical node in the national distributed data network. The provider will serve their data online (either hosted in-house or through hosting by other consortium servers) and will act as a catalyzing agent for accessing other data sources in their respective states.

Key components of the network include:

  • Catalog systems for data discovery;
  • Service specifications that define interfaces for searching catalogs and accessing resources;
  • Shared interchange formats to encode information for transmission (i.e., various XML markup languages);
  • Data providers that publish information using standardized services defined by the network; and
  • Client applications enabled to utilize information resources provided by the network.

By working collaboratively with our partners and affiliates, the State Geothermal Data project is a small but significant step forward in the future production of domestic geothermal energy. The standardized sets of geothermal resource data will be available to the public and serve to focus geothermal exploration activities, thereby mitigating investment risks.

www.stategeothermaldata.org

 

Data services

Various web services have been deployed by the AASG state geothermal data project for the NGDS. OpenGeospatial Consortium (OGC) web map services (WMS) and web feature services (WFS) are being deployed to expose data including borehole temperature measurements, active faults, volcanic vents, well header information, aqueous chemical analyses and other information. The map services use standard legends so that data from adjacent states is displayed in a consistent way. Feature services utilize consistent data schemes  developed by the AASG Geothermal project as part of the US Geoscience Information Network (USGIN) (see also content models) and under review for use by other project participants in the NGDS.

A list of the registered web map services is available here (108 services as of 12/22/2011)

A list of the registered web feature services is available here. (73 services as of 12/22/2011)

NOTE that the ‘Open’ and ‘Preview’ links on these pages do not work.

Catalog service 

The data and services from the AASG Geothermal Data project are being registered in the AASG Geothermal Data Catalog, and metadata for the services and datasets served may be searched through the AASG portal to NGDS.  An ESRI ArcMap extension that will search the AASG Geothermal Data Catalog (as well as several other CSW servers) can be obtained here; this extension can be used to find WMS and load them as layers in an ArcMap project.

The AASG Geothermal Data Catalog is exposed through an OGC Catalog Service for the Web (CSW) interface, implementing the OGC ISO Metadata Application profile following the USGIN recommended practices. The content in the metadata records follows the USGIN Metadata Recommendations for Geoscience Resources.
Copyright (c) Boise State University 2012