Metadata play a fundamental role in both DLs and SDIs. Commonly defined as "structured data about data" or "data which describe attributes of a resource" or, mo

Science is increasingly driven by data, and spatial data underpin the science directions laid out in the 2007 U.S. Geological Survey (USGS) Science Strategy. A

In the wake of the so-called information technology revolution, many stakeholders from the public and private sectors (including citizens) have indeed grown acc

The National Spatial Data Infrastructure (NSDI) was envisioned as a way of enhancing the accessibility, communication, and use of geospatial data to support a w

Geographic information systems (GIS)--a central repository of geographic data collected from various sources, including satellites and GPS--is emerging as one o