{"thcode":3,"term":{"code":311,"name":"deserts","parent":112,"scope":"Regions rendered barren or partially barren by environmental extremes, especially by low rainfall. [USGS Circ 1048]"},"uf":[{"name":"arid regions","usewith":false},{"name":"bajadas","usewith":false},{"name":"rock deserts","usewith":false},{"name":"sandy areas","usewith":false},{"name":"sandy deserts","usewith":false},{"name":"stony deserts","usewith":false}],"bt":[{"code":112,"name":"biogeographic regions","parent":928,"scope":"Geographic regions characterized chiefly by the dominant forms of plant life and the prevailing climate. [Adapted from American Heritage Dic. of the English Language, 4th ed.]"},{"code":928,"name":"regions","parent":1,"scope":"(a) Large, indefinite portions of the earth's surface. (b) Specified districts or territories. (c) Areas of interest or activity; spheres. (d) Ecology. Parts of the earth characterized by distinctive animal or plant life. [Adapted from American Heritage Dic. of the English Language, 4th ed.]"},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":77,"name":"badlands","parent":816,"scope":"Areas characterized by a maze of very closely spaced, deep, narrow, steep-sided ravines, and sharp crests and pinnacles. [NIMA GEONet Designation ... Definitions <http:\/\/164.214.2.59\/gns\/html\/desig.html> ]"},{"code":89,"name":"barren lands","parent":112,"scope":"Places composed of bare rock, sand, gravel, or other earthen material with little or no vegetation and having limited ability to support life. [USGS Circ 1048]"},{"code":342,"name":"dunes","parent":816,"scope":"Low mounds, ridges, banks, or hills of loose, wind-blown granular material, either bare or covered with vegetation, capable of movement from place to place but always retaining their characteristic shape. [Adapted from Glossary of Geology, 4th ed.]"},{"code":747,"name":"oases","parent":112,"scope":"Fertile, vegetated areas in the midst of a desert, where the water table has come close enough to the surface for wells and springs or seepages to exist, thus making them suitable for human habitation. [Glossary of Geology, 4th ed.]"}]}