{"thcode":2,"term":{"code":1186,"name":"transect sampling","parent":379,"scope":"Systematic method of collecting field data by recording observations or collecting specimens along a vector or measured course across the environment."},"uf":[],"bt":[{"code":379,"name":"field sampling","parent":376,"scope":"Collecting pieces or specimens or making measurements or observations at determined intervals or areas.  Results may be used as representative of the whole research area or population."},{"code":376,"name":"field methods","parent":734,"scope":"Research procedures and instrumental means to measure, collect data and samples, and observe in the natural areas where the materials, phenomena, structures, or species being studied occur."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"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":911,"name":"plot sampling","parent":379,"scope":"Outlining small areas of land within a larger area to use as samples to study biological populations or ecosystems."},{"code":1189,"name":"trenching","parent":379,"scope":"Field method used by earth scientists to study the underground structure of an area. A long narrow ditch is dug to locate geologic features, such as a fault."}]}