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The U.S. Geological Survey is undertaking the design and population of a Distributed Spatial Data Library (DSDL) for use in water-resources investigations. The DSDL includes on-line digital spatial data commonly used in hydrologic applications that apply geographic information systems (GIS) techniques to analyze and display data. The DSDL uses a structured library format and widearea network access mechanism that facilitates data discovery and exchange among GIS users at more than 80 offices of the U.S. Geological Survey. The DSDL framework includes a data dictionary of available data layers and their attributes, a standard data storage directory structure and file nomenclature, an index of available data at various map scales, data browsing software, a repository of data processing software, on-line data automation documents, and ~ as they are made available ~ populated spatial data layers at scales appropriate for hydrologic analysis. A workplan is being used to define priority data layers, data automation procedures, and an estimate of resources required to populate portions of the DSDL. Population of the DSDL with data, programs, and data automation guidelines is accomplished through national programs and individual offices in a coordinated manner to support existing research and water-resources applications at the local, regional, and national level.

Design of the Distributed Spatial Data Library (DSDL) for the Water Resources Division, U. S. Geological Survey