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Supersites infrastructure: data access services and
tools
Chuck Meertens, Jeff McWhirter, Fran Boler, Stuart Wier, Susanna Gross, Scott Baker, UNAVCO
Supersites Splinter Meeting, EGU, 9 April 2013
UNAVCO is supported by NASA to handle data management and web site presentation for the Geohazards Supersites/Natural Laboratories. UNAVCO also has support from NASA for LiDAR and SAR seamless archives.
Fostering International Data Sharing:Geohazards Supersites/Natural Laboratories
SAR and other remote sensing data are contributed by Space Agencies and UNAVCO and IRIS index available Earth science data in the GEO-sponsored Geohazards Supersites / Natural Laboratories.
Supersites has been highly successful as a data and results sharing mechanism for the catastrophic Haiti Earthquake, Chile Earthquake, and Tohoku-Oki Earthquake and Tsunami. In addition to Space Agency-contributed SAR, scientists post early analyses and results on Supersites Event pages.
CurrentGeohazards Supersites/Natural Laboratories
Current GSNL website provides simple links to resources, no federated queries capability. Each website provides unique data search and access tools.
Proposed data plan provides “Seamless” access including:
- Simple RESTful APIs at each repository to query and access local holdings in a consistent manner
- Similar API for federated query and access from multiple repositories with aggregated responses
- Access to multiple domains (e.g. Geodetic Data, SAR, Seismic and other collections
- Possible Federated Data Viewer that is web services-enabled
Geodesy Seamless Archive Centers – GSAC
Funding from the NASA ROSES ACCESS Program is allowing UNAVCO, SOPAC, CDDIS, and the University of Nevada, Reno to partner in developing a web services enabled GSAC. The web services are built upon simple RESTful web services (Google wiki restful web services).
UNAVCO - Geodesy Seamless Archive Centers
Example webpage search form of UNAVCO’s archive using the GSAC API.
CDDIS - GSAC
The NASA CDDIS has implemented the GSAC API for their primary database search capability.
SOPAC - GSAC
The SOPAC GSAC Form and Search Capability
Federated Search with the Geodesy Seamless Archive Centers
The GSAC Service Layer (GSL) provides consistent results from single repositories. It also facilitates federated search capability returning for example all data available from multiple repositories for a given area for a given range of dates. Other repositories can be relatively easily added to the federated GSL.
GSAC Service Layer – ‘GSL’
Federated Repository Utilizes Multiple Instances of the GSL
Federated Search with the Geodesy Seamless Archive Centers
The GSAC Service Layer (GSL) facilitates federated search capability returning for example all data available from all three repositories for a given area for a given range of dates. At the moment the federated GSL is hosted only at UNAVCO but others can implement it for their own projects (e.g. Supersites and EPOS). GSAC repositories can participate in multiple federated services.
UNAVCO – SOPAC – CDDIS : Aggregated Response
Query Form
New developments with RING network in Italy
UNAVCO is working with INGV on a demonstration of GSAC for RING. The GSAC Java-based software package is openly available on SourceForge and has been tailored for the RING implementation for this demonstration. Plans are underway to install at other archives.
New developments with RING network in Italy
RING-specific web services capabilities page
Response to query
Draft Data Plan – Integrate access to multiple data types.
Ground Geodetic Data from GSAC
Seismic API from federated “COOPEUS” archives
SAR data from ASF, UNAVCO and space agencies (via SSARA API is proposed)
Draft Data Plan – Demonstrated Multidata Query Interface
Federated, Integrated query of GSAC, IRIS, and SSARA web services for Hawaii. The queries are on the fly to each archive/repository and aggregated for display and data access. A tool like this could be developed for Supersites.
Draft Data Plan – Integrate access to multiple data types.
Ground Geodetic Data from GSAC
Seismic API from federated “COOPEUS” archives
SAR data from ASF, UNAVCO and space agencies (via SSARA API is proposed)
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