Improvement of scientific data usability,ĭetailed technical information is available in Frequently Asked Questions list. Knowledge organization system development, Institutional structures and activities Activities, processes, and organizational concepts.Įlectromagnetic reflectance and emissivity,

Time periods Geologic time periods and seasons of the year. Product types General representation of the information in a resource, such as a map or dataset. Topics Themes, subjects, and concerns for which USGS information resources are relevant. Methods Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS. Sciences Major educational fields, fields of study, and professional groupings within USGS. The USGS Thesaurus has the following top-level categories that are used to group scientific concepts. In the USGS Thesaurus, Sciences is a broader or parent term to Earth Sciences. A more specific type of Sciences is Earth Sciences.

The USGS Thesaurus is structured as a hierarchy of terms because relationships between concepts are represented.įor example, Sciences is broad and general concept. This controlled vocabulary helps to categorize USGS information and allows people and computers to find collections of information resources that have common characteristics. The USGS Thesaurus provides a controlled vocabulary of scientific concepts relevant to the mission and work of the USGS. Explore Outline Web Services Check terms Common Geographic Areas FAQ Suggest a term Purpose

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