Reston

Integrated Taxonomic Information System

"ITIS is an easily accessible database with reliable information on species names and their hierarchical classification that is publicly accessible with unlimited free use. The database is reviewed periodically to ensure high quality with valid classifications, revisions, and additions of newly described species. The ITIS includes documented taxonomic information of flora and fauna from both aquatic and terrestrial habitats.

Biocomplexity Thesaurus

"Development of the Biocomplexity Thesaurus began in 2002-2003 through a partnership between the former USGS NBII Program and ProQuest (formerly CSA), a worldwide information company with more than 30 years experience as a leading bibliographic database provider. The original Biocomplexity Thesaurus, first made available online in 2003, was a merger of five individual thesauri:
* the CSA Aquatic Sciences and Fisheries Thesaurus
* the CSA Life Sciences Thesaurus
* the CSA Pollution Thesaurus
* the CSA Sociological Thesaurus
* the CERES/NBII Thesaurus

"Development of the Biocomplexity Thesaurus began in 2002-2003 through a partnership between the former USGS NBII Program and ProQuest (formerly CSA), a worldwide information company with more than 30 years experience as a leading bibliographic database provider. The original Biocomplexity Thesaurus, first made available online in 2003, was a merger of five individual thesauri:
* the CSA Aquatic Sciences and Fisheries Thesaurus
* the CSA Life Sciences Thesaurus
* the CSA Pollution Thesaurus
* the CSA Sociological Thesaurus
* the CERES/NBII Thesaurus

U.S. National Vegetation Classification

"Classifying vegetation is a critical to sound ecological science and efficient land assessment, management and planning. The National Vegetation Classification (NVC) is a central organizing framework for how all vegetation in the United States is inventoried and studied, from broad scale formations (biomes) to fine-scale plant communities. The purpose of the NVC is to produce uniform statistics about vegetation resources across the nation, based on vegetation data gathered at local, regional, or national levels.

U.S. Geological Survey Library Classification System

"The U.S. Geological Survey Library classification system has been designed for earth science libraries. It is a tool for assigning call numbers to earth science and allied pure science materials in order to collect these materials into related subject groups on the library shelves and arrange them alphabetically by author and title. The classification can be used as a retrieval system to access materials through the subject and geographic numbers.

U.S. Geological Survey Thesaurus

"The USGS Thesaurus is the principal controlled vocabulary supporting Science Topics. It is designed as a formal thesaurus conforming to ANSI/NISO Z39.19, with rigid adherence to the hierarchical (BT, NT) term relationships, generic non-hierarchical (RT) relationships, and lead-in term relationships linking non-preferred terms to descriptors either singly (UF) or in a compound USE-WITH relationship. The thesaurus is faceted, meaning its top terms delineate general aspects of information resources: Sciences: Major educational fields, fields of study, and professional groupings within USGS.