Searchable database of almost 2 million U.S. features. Provides description of feature and will locate on map if requested. The purpose of GIS Data Depot is to promote the open exchange and free transfer of geospatial data on the Internet. Datasets are organized geographically, and most can be downloaded for free. Free GIS software is also available.
Site is searchable.
A comprehensive source of information about global change data available to the scientific community from throughout the world. Data sets include coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere, and human dimensions of global change. Site is searchable. Many links to hydrology related resources including data sources, bibliographies, discussion groups, research organizations, projects, and more. Site is searchable.