Search by topic or browse USGS science to find definitions, links to related Web sites, and related terms.

Search the National Biological Information Infrastructure (NBII)

BioBot: The National Biological Information Infrastructure (NBII) is a broad, collaborative program to provide increased access to data and information on the nation's biological resources. The NBII links diverse, high-quality biological databases, information products, and analytical tools.

NBII Metadata Clearinghouse: The National Biological Information Infrastructure (NBII) Metadata Clearinghouse service enables search through metadata-based descriptions of biological data sets and information products from many different sources to identify those that meet particular search criteria. The NBII Clearinghouse is an initiative to help locate, evaluate, and access biological data and information from a distributed network of cooperating data and information sources. The Clearinghouse also provides access to software tools to use in analyzing, integrating, and applying biological data.

Search the National Water Information System (NWIS)

NWISWeb: This Web site provides access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico. Online access to this data is organized around the categories of surface water, ground water, and water quality.

Browse or Search Earth Science Data

Geoscience Data Catalog: A catalog of earth science data produced by the U.S. Geological Survey.

Search the U.S. Geological Survey Library

USGS Library Catalog: This site contains over 325,000 records for materials that have been added to the library since 1975.