A Web Tool for Finding Data in Heterogeneous, Multi-Platform Data Collections by Simultaneously Pivoting on Multiple Metadata Hierarchies
AGU 2005 Fall Meeting Poster:
MOQuA Demo ("get data" does not work, may need a re-load to load correctly.)
Status as of 2005-12-07:
* "Get Data" does not work. This will be resolved in the Spring of 2006.
Future ocean observing systems will consist of a heterogeneous mix of mobile platforms such as drifters, autonomous underwater vehicles and ships, fixed measurement assets such as moorings and radar, and remote measurements from satellites and aircraft.Such heterogeneous observing systems may be managed by multiple investigators with ties to multiple institutions, and may be reconfigured at will to respond to observational opportunities and changing objectives.Such dynamic observing systems will require dynamic data management systems to accommodate the addition of new data streams, data archiving, modeling and prediction, data integrity, decision aids, and data search and discovery.
The Metadata Oriented Query Assistant (MOQuA) is designed to aid in data search and discovery from a dynamic, multi-discipline, multi-institutional data collection. Various tools are now available for provide access to gridded and scattered data sets. Typically, a user selects data by drilling down: first selecting a data set, then selecting variables of interest within that data set, followed by selections of constraints (typically time, altitude, latitude, and longitude). While existing tools are useful, they do not facilitate rapid understanding of the interactions between data sets.For example, it is currently difficult to determine if two platforms have measured the same quantity at the same time in the same locality, or to determine the spatial coverage of a desired measurement.
The Web-based MOQuA user interface provides simultaneous, visual selection of data sets, variables of interest, and regions of interest.For example, if one selects a region of time and space, the data sets and variables that have data in that realm are highlighted. If one selects one or more variables, the data sets that contain those variables are highlighted, and a representation of the data appears on the selection map, on the time line, and on the altitude selector.Likewise, selecting data sets highlights the variables contained in the data sets.The MOQuA user interface is also capable of displaying metadata (variable names and categorizations) in with a user's preferred ontology, through the Marine Metadata Initiative (MMI) Web service.
The MOQuA interface is a powerful tool for selecting data from the heterogeneous data collections that would result from an ocean observatory or an intensive observation campaign. Access to field data from the 2003 Autonomous Ocean Sampling Network (AOSN) Monterey Bay field experiment will be demonstrated using the MOQuA interface.
Last updated: Feb. 06, 2009