MGDS is an interactive digital data library, data repository, and curated metadata catalog that offers a suite of services for data discovery and preservation. The system currently provides open, web-based access to 103.7TB of data, corresponding to over 1,970,000 digital data files from more than 3,373 research programs dating back to the 1970’s. Data and metadata can be accessed through a geospatially-enabled search interface and through web services that follow the specifications of the Open Geospatial Consortium (OGC) Program.