Abstract
Web Services and Hydrologic Observation Data Dissemination Track: Water Resources Author(s): David Valentine, Ilya Zaslavsky The CUAHSI hydrologic information system (HIS) organizes multiple databases, Web services, and client applications, into a multi-tier network of HIS servers for publishing, accessing, querying, and visualizing hydrologic observation data. The system follows service-oriented architecture, with Web services for uniform programmatic access to heterogeneous federal data repositories as its core. The second generation of services supports data and metadata discovery and retrieval from USGS NWIS (steam flow, groundwater and water quality repositories), EPA STORET water quality data, NCDC ASOS, DAYMET daily observations, NASA MODIS, and Unidata NAM streams. Accessed from a single discovery interface developed as an ASP.NET application over ArcGIS Server, the Web services support comprehensive hydrologic analysis at the catchment, watershed and regional levels. Resolving semantic and structural heterogeneities across different repositories, and distilling a generic set of service signatures, has been the main scalability challenge of this project. David Valentine University of California, San Diego San Diego Supercomputer Center 9500 Gilman Drive La Jolla , CA 92093 US Phone: 858-822-0923 E-mail: valentin@sdsc.edu Ilya Zaslavsky University of California San Diego San Diego Supercomputer Center 9500 Gilman Drive La Jolla , CA 92093 US Phone: 858-534-8342 E-mail: zaslavsk@sdsc.edu |
|||||
