{"thcode":2,"term":{"code":2290,"name":"electromagnetic reflectance and emissivity","parent":1367,"scope":"Effectiveness of an earth material in reflecting or emitting radiation, varying by wavelength.  Measurements are made over the infrared part of the electromagnetic spectrum in a laboratory to compare with remotely-sensed data obtained by airborne or satellite imaging systems."},"uf":[{"name":"infrared reflectance","usewith":false},{"name":"laboratory reflectance","usewith":false},{"name":"laboratory spectra","usewith":false},{"name":"spectral radiance","usewith":false},{"name":"spectral reflectance","usewith":false}],"bt":[{"code":1367,"name":"earth material properties","parent":287,"scope":"Physical characteristics of rocks and unconsolidated earth materials such as soils and sediments."},{"code":287,"name":"earth characteristics","parent":1174,"scope":"The measurable, definable properties and features of the earth."},{"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":588,"name":"infrared imaging","parent":981,"scope":"Method of remote sensing in which optical sensors produce visible representations of infrared rays or radiated heat from the observed objects and the temperature variations are represented by different colors in the image."}]}