{"thcode":2,"term":{"code":445,"name":"geographic information systems","parent":587,"scope":"Computer software that allows geospatially referenced data to be linked to geographic features. Use this term only for information that is about GIS and not for the use of GIS in applications and projects."},"uf":[{"name":"GIS","usewith":false},{"name":"geographic information systems (GIS)","usewith":false}],"bt":[{"code":587,"name":"information system design and development","parent":1174,"scope":"Use for the design and development of information systems.  Do not use for general cases in which information systems are part of the activity."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":492,"name":"GPS measurement","parent":450,"scope":"Determination of distance and location using instruments receiving signals from the Global Positioning System, a system of satellites for identifying earth locations."},{"code":237,"name":"decision support methods","parent":689,"scope":"Mathematical, analytical, and social procedures used to aid groups and individuals in the process of making decisions.  Includes protocols for discussion and mechanisms for facilitating communication among disparate groups as well as mechanical and technological aids to analysis and understanding."},{"code":447,"name":"geography","parent":291,"scope":"Study of the earth's landforms, topography, and climate, the distribution of flora and fauna, and the distribution, culture, and activities of human populations."},{"code":450,"name":"geolocation measurement","parent":376,"scope":"Methods for establishing a geographic location on the surface of the earth."},{"code":474,"name":"geospatial datasets","parent":235,"scope":"Collections of related digital information that are geographically referenced."},{"code":585,"name":"information sciences","parent":1019,"scope":"Sciences dealing with the compilation, processing, classification, display, transmission, storage, and retrieval of recorded knowledge."},{"code":692,"name":"map coordinate systems","parent":1174,"scope":"Systems using sets of numbers combined with geometric nets or grids to specific positions on a map or globe."}]}