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Definition

Type(s): Occurrence type

Subject Identifiers (1)

Internal Occurrences (1)

  • Description
    • A statement or formal explanation of the meaning of a concept.

Occurrences of this Type (175)

  • (a) Broad expanses of terrain covered with snow, relatively smooth and uniform in appearance, occurring usually at high latitudes or in mountainous regions above the snowline, and persisting throughout the year. (b) Regions of permanent snow cover, as at the heads of glaciers. [Glossary of Geology, 4th ed.] (snow regions)
  • (a) Chains of hills or mountains; (b) somewhat linear, complex mountainous or hilly areas. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (mountain ranges)
  • (a) Divisions or parts of a continent having characteristics that distinguish them from the rest of the continent. These subdivision are typically based on geologic or geomorphic characteristics. (b) Large land masses smaller than any of the seven recognized continents. [Adapted from Glossary of Geology, 4th ed.] (subcontinents)
  • (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.] (regions)
  • (a) Relatively narrow seas or stretches of water between two close landmasses and connecting two larger bodies of water; (b) Deeper parts of a moving body of water (as bays, estuaries, or straits) through which the main current flows or which affords the best passage through an area otherwise too shallow to navigate. [Glossary of Geology, 4th ed.] (channels)
  • Accumulations of earth and stones carried and deposited by a glacier. [USGS Circ 1048] (moraines)
  • 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] (badlands)
  • Areas characterized by fractures in the Earth's crust. [Adapted from UGSG Circ 1048] (fault zones)
  • Areas cleared of vegetation for the purpose of impeding the progress of a grass or forest fire. [USGS Circ 1048] (firebreaks)
  • Areas covered with low-growing or stunted perennial vegetation and usually not mixed with trees. [USGS Circ 1048] (shrublands)
  • Areas for which there exist public records, surveys, or maps of the value, extent, and ownership of land as a basis of taxation. [American Heritage Dic. of the English Language, 4th ed.] (cadastral areas)
  • Areas from which rockets/missiles may be housed and projected, usually equipped with associated buildings and facilities. [USGS Circ 1048] (launch facilities)
  • Areas including a dam and associated structures functioning to control the flow or raise the level of water. [USGS Circ 1048] (dam sites)
  • Areas of formations resulting from the consolidation of molten rock on the surface of the Earth. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (lava fields)
  • Areas of geologic formations of irregular limestone deposits with sinks, underground streams, and caverns. [EPA Terms of Environment http://www.epa.gov/OCEPAterms/] (karst areas)
  • Areas of historical significance containing the deteriorated remains of a structure(s) or where past human life and activities are under study. [USGS Circ 1048] (archaeological sites)
  • Areas of land for burying the dead with two or more graves. [USGS Circ 1048] (cemeteries)
  • Areas reserved for indigenous inhabitants. (tribal areas)
  • Areas set aside for the preservation of fauna, flora, and their natural habitats. [Macmillan Encyc., 2001] (reserves)
  • Areas where masses of naturally occurring mineral material are found, e.g. metal ores or nonmetallic minerals. [Adapted from Glossary of Geology, 4th ed.] (mineral deposit areas)
  • Areas where refuse is dumped. [USGS Circ 1048] (disposal sites)
  • Areas with reserves of recoverable petroleum or where petroleum has been removed from the Earth. [Adapted from USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (oil fields)
  • Artificial embankments built along the bank of a watercourse or an arm of the sea, to protect land from inundation or to confine streamflow to its channel. [Glossary of Geology, 4th ed.] (levees)
  • Artificial waterways with no flow or a controlled flow used for navigation (canal), or for draining or irrigating land (ditch). [USGS Circ 1048] (canals)
  • Artificially impounded bodies of water. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (reservoirs)
  • Basins in which drainage water is naturally detained. [Adapted from Glossary of Geology, 4th ed.] (storage basins)
  • Bodies of rock that contain sufficient saturated permeable material to conduct ground water and to yield significant quantities of water to wells and springs. [Glossary of Geology, 4th ed.] (aquifers)
  • Bodies or streams of ice moving outward and downslope from an area of accumulation; areas of relatively permanent snow or ice on the top or side of a mountain or mountainous area. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (glacier features)
  • Bowl-like hollows partially surrounded by cliffs or steep slopes at the head of a glaciated valley. [NIMA GEONet Designation ... Definitions http://164.214.2.59/gns/html/desig.html] (cirques)
  • Bowl-shaped, natural depressions in the surface of the land or ocean floor. [Adapted from USGS Circ 1048] (basins)
  • Broadly, currents in the ocean - tidal or nontidal, permanent or seasonal, horizontal or vertical - characterized by regularity, either as a continuous streams flowing along a definable path, or less commonly of a cyclic nature. [Glossary of Geology, 4th ed.] (ocean currents)
  • Buildings and installations for the treatment of offenders (through a system of penal incarceration, rehabilitation, probation, and parole). [Adapted from American Heritage Dic. of the English Language, 4th ed.] (correctional facilities)
  • Buildings housing judicial courts, or the offices of a county governments. [American Heritage Dic. of the English Language, 4th ed.] (court houses)
  • Buildings in which governmental legislatures meet. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (capitol buildings)
  • Buildings or groups of buildings used as institutions for study, teaching, and learning. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (educational facilities)
  • Buildings where cultural events are presented before an audience. (performance sites)
  • Buildings where mail is received, sorted, and delivered, and where stamps and other postal materials are sold. [American Heritage Dic. of the English Language, 4th ed.] (post office buildings)
  • Buildings where the acquisition, conservation, study, exhibition, and educational interpretation of objects having scientific, historical, or artistic value takes place. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (museum buildings)
  • Chains of coral at or near the surface. [USGS Circ 1048] (coral reefs)
  • Chains of rocks or coral at or near the surface of water. [USGS Circ 1048] (reefs)
  • Circular-shaped depressions at the summit of a volcanic core or on the surface of the land caused by the impact of a meteorite; man-made depressions caused by an explosion. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (craters)
  • Cleared paths, beaten tracks, or improved surfaces, as through woods or wilderness, not usually trafficked by vehicles because of width, seasonal conditions, or access restrictions. [USGS Circ 1048] (trails)
  • Closed depressions in an arid or semi-arid region that are periodically inundated by surface runoff, or the salt flat within such a closed basin.[Encyc. Dictionary of Physical Geography] (playas)
  • Commercially operated enterprises that offer rides, games, and other forms of entertainment. [American Heritage Dic. of the English Language, 4th ed.] (amusement parks)
  • Comparatively flat areas of great extent and elevation; specif. extensive land regions considerably above the adjacent country or above sea level; commonly limited on at least one side by an abrupt descent, have flat or nearly smooth surfaces but are often dissected by deep valleys and surmounted by high hills or mountains, and have a large part of their total surface at or near the summit level. [Glossary of Geology, 4th ed.] (plateaus)
  • Continuous salt-water bodies that surround the continents and fill the Earth's great depressions. [Adapted from Glossary of Geology, 4th ed.] (oceans)
  • Conveyor systems in which carrier units run on wire cables strung between supports. [USGS Circ 1048] (cableways)
  • Cracks along a rift or ridge in the deep ocean floor that spews out water heated to high temperature by the magma under the Earth's crust. [Columbia Electronic Encyc., 1999] (hydrothermal vents)
  • Curves in the course of a stream and (or) the land within the curve; curves in a linear body of water. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (bends (river))
  • Curves or bends of a planar structure such as rock strata, bedding planes, foliation or cleavage; usually products of deformation. [Adapted from Glossary of Geology, 4th ed.] (folds (geologic))
  • Defined areas in which an official, usually periodic enumeration of a population is carried out, often including the collection of related demographic information. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (census areas)
  • Defined urbanized areas for statistical purposes meeting requirements of the Census Bureau. [Adapted from http://www.census.gov/population/www/estimates/aboutmetro.html] (Metropolitan Statistical Areas)
  • Dense growths of trees, plants, and underbrush covering a large area. [American Heritage Dic. of the English Language, 4th ed.] (forests)
  • Designated areas on which primitive structure(s) are erected for temporary shelter or where recreational vehicles are temporarily parked. [USGS Circ 1048] (camps)
  • Designated areas where motor vehicles are left temporarily. [USGS Circ 1048] (parking sites)
  • Designated zones of a country for efficient sorting and delivery of mail. (postal areas)
  • Drainage divides that separate streams flowing towards opposite sides of a continent, often into different oceans. [Glossary of Geology, 4th ed.] (continental divides)
  • Earth's major land masses, including both dry land and continental shelves. [Glossary of Geology, 4th ed.] (continents)
  • Elevations of the sea floor, 1000 m or higher, either flat-topped (guyots) or peaked (seapeaks). [Glossary of Geology, 4th ed.] (seamounts)
  • Elevations with a narrow, elongated crest which can be part of a hill or mountain. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (ridges)
  • Elongated zones of unusually irregular topography on the deep-sea floor that often separate regions of different depths [Glossary of Geology, 4th ed.] (fracture zones)
  • Extensive noncultivated areas where vegetation is dominated by grasses or grass-like plants. [USGS Circ 1048] (grasslands)
  • Fan-shaped deposits of alluvium (river or stream-bed sediment). [Nature Net: National Park Service: Natural Resource Keyword Thesaurus http://www.nature.nps.gov/nrbib/HTML%20files/4.htm#324] (alluvial fans)
  • Fast-flowing sections of a stream, often shallow and with exposed rock or boulders. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (rapids)
  • Features formed from those igneous rocks that have reached or nearly reached the Earth's surface before solidifying. [Adapted from Glossary of Geology, 4th ed.] (volcanic features)
  • Features on the ocean floor at a depth of 3500 - 6000 meters. [Adapted from Glossary of Geology, 4th ed.] (abyssal features)
  • Features resulting from structural deformation of the earth's crust through tectonic processes. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (tectonic features)
  • 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.] (oases)
  • Fields of ice, formed in regions of perennial frost. [USGS Circ 1048] (ice masses)
  • Fields, centers, or open areas maintained for the purpose of holding sporting events and activities. [USGS Circ 1048] (sports facilities)
  • First-order divisions of a nation. [USGS Circ 1048] (countries, 1st order divisions)
  • Flat or nearly flat land along a river or stream or in a tidal area that is covered by water during a flood. [EPA Terms of Environment http://www.epa.gov/OCEPAterms/] (floodplains)
  • Flat plains formed by alluvial deposits at the mouth of a stream. [NIMA GEONet Designation ... Definitions http://164.214.2.59/gns/html/desig.html] (deltas)
  • Forests where the annual rainfall is at least 100 inches. The regions are characterized by tall, lush, evergreen trees. [Glossary of Geology, 4th ed.] (rain forests)
  • Fossilized remains of large dense growths of trees. [Adapted from Glossary of Geology, 4th ed.] (petrified forests)
  • Fractures in the Earth's crust accompanied by a displacement of one side of the fracture with respect to the other. [UGSG Circ 1048] (faults)
  • General term for any works made to oppose a small number of troops against a greater. [Getty Art & Architecture Thesaurus] (fortifications)
  • Geographic districts, the public schools of which are administered together. [American Heritage Dic. of the English Language, 4th ed.] (school districts)
  • 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.] (biogeographic regions)
  • Geologic folds in surface strata sloping downward on both sides from a common crest. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (anticlines)
  • Gridded areas of the Earth's surface resulting from the use of the Universal Transverse Mercator projection and the international coding conventions for labeling the zones. (UTM zones)
  • Groups of associated structures functioning as a unit used for generating electricity. [USGS Circ 1048] (power generation sites)
  • Groups of associated structures functioning as a unit used for refining a material or manufacturing a product. [USGS Circ 1048] (industrial sites)
  • Groups of buildings and neighborhoods in which people live. (housing areas)
  • Groups of buildings or associated structures functioning as a unit used predominantly for educational. correctional, governmental, medical, or religious purposes. [USGS Circ 1048] (institutional sites)
  • Harbor facilities for recreational craft where supplies, repairs, and various services are available. [USGS Circ 1048] (marinas)
  • High vertical, near-vertical, or overhanging faces of rock, earth, or ice. [USGS Circ. 1048] (cliffs)
  • Holes in the Earth's crust from which hot water and steam (geysers), and gases and vapors (fumaroles) are emitted. [Adapted from USGS Circ 1048 and Glossary of Geology, 4th ed.] (thermal features)
  • Incorporated populated places. [Adapted from USGS Circ 1048] (cities)
  • Indentations of a coastline or shoreline enclosing a part of a body of water; bodies of water partly surrounded by land. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (bays)
  • Installations supporting aircraft capable of taking off and landing on water. [NIMA Feature Attribute Coding Catalog (FACC)] (seaplane bases)
  • Landmasses that project conspicuously above their surroundings. [USGS Circ 1048] (mountains)
  • Large bodies of salt water. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (seas)
  • Large containers used for storage. [USGS Circ 1048] (storage structures)
  • Largest of various forms of inlets of the sea; usually larger, more enclosed, and more deeply indented than bays. [Glossary of Geology, 4th ed.] (gulfs)
  • Linear bodies of water flowing on the Earth's surface. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (streams)
  • Long gradual bends or gentle curves, or slight crescent-shaped indentations, in the shoreline of an open coast or of a bay. [Glossary of Geology, 4th ed.] (bights)
  • Long narrow glacially-eroded inlets of the sea, U-shaped and steep-walled, generally several hundred meters deep, between high rocky cliffs or slopes along a mountainous coast. [Adapted from Glossary of Geology, 4th ed.] (fjords)
  • 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.] (dunes)
  • Low, smoothly rounded, elongate oval hills, mounds or ridges of compact glacial till built under the margin of the ice and shaped by its flow, or carved out of an older moraine by readvancing ice. [Adapted from Glossary of Geology, 4th ed.] (drumlins)
  • Low-lying land bordered by higher ground; especially elongate, relatively large gently sloping depressions of the Earth's surface, commonly situated between two mountains or between ranges of hills or mountains, and often containing a stream with an outlet. [Glossary of Geology, 4th ed.] (valleys)
  • Manmade facilities maintained for the use of aircraft. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (airport features)
  • Manmade shafts or holes in the Earth's surface used to obtain fluid or gaseous materials. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (wells)
  • Manmade structures, higher than their diameter, generally used for observation, storage, or electronic transmission. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (towers)
  • Map regions showing coastlines, water depths, or other information of use to navigators. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (chart regions)
  • Massive topographic and structural features, commonly formed of rocks more rigid than those of their surroundings. [Adapted from Glossary of Geology, 4th ed.] (massifs)
  • Mills or other machines that run on the energy generated by a wheel of adjustable blades or flats rotated by the wind. [USGS Circ 1048] (windmills)
  • Minor civil units. [USGS Circ 1048] (countries, 3rd order divisions)
  • Minor civil units. [USGS Circ 1048] (countries, 4th order divisions)
  • Narrow sections of land in a body of water connecting two larger land areas. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (isthmuses)
  • Narrow shelves or projections of rock formed on a rock wall or cliff face. [Glossary of Geology, 4th ed.] (ledges)
  • Narrow, elongate depressions of the deep-sea floor associated with a subduction zone. They are oriented parallel to volcanic arcs and commonly to the edge of the continent, between the continental margin and the abyssal hills. [Glossary of Geology, 4th ed.] (ocean trenches)
  • Natural accumulations of sand, gravel, or other material forming an underwater or exposed embankment. [USGS Circ 1048] (bars (physiographic))
  • Natural arch-like openings in a rock mass. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (arches (natural formation))
  • Natural freshwater surface streams of considerable volume and a permanent or seasonal flow, moving in a definite channel toward a sea, lake, or another river; any large streams, or ones larger than brooks or creeks, such as the trunk stream and larger branches of a drainage system. [Glossary of Geology, 4th ed.] (rivers)
  • Natural inland bodies of standing water, generally of appreciable size, occupying a depression in the Earth's surface. [Adapted from Glossary of Geology, 4th ed.] (lakes)
  • Natural underground passageways or chambers, or hollowed out cavities in the side of a cliff. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (caves)
  • Naturally formed topographic features, commonly differing conspicuously from adjacent objects or material. [Adapted from Glossary of Geology, 4th ed.] (natural rock formations)
  • Ocean floor between the shoreline and the abyssal ocean floor. [Glossary of Geology, 4th ed.] (continental margins)
  • Open ways for passage of vehicles. [USGS Circ 1048] (roadways)
  • Particular environments or places where an organism or species tends to live. [Glossary of Geology, 4th ed.] (habitats)
  • Peaks of mountains. [USGS Circ 1048] (mountain summits)
  • Permanent constructions that are roofed and usually walled. [USGS Circ 1048] (buildings)
  • Perpendicular or very steep falls of water in the course of a stream. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (waterfalls)
  • Places built for the observance of faith and the pursuit of a religious life. (religious facilities)
  • 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] (barren lands)
  • Places for helicopters to land and take off. [American Heritage Dic. of the English Language, 4th ed.] (heliports)
  • Places or areas developed for public use or recreation. [USGS Circ 1048] (parks)
  • Places or areas from which commercial minerals are or were removed by excavation from the Earth. [Adapted from USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (mine sites)
  • Places or areas with clustered or scattered buildings and a permanent human population. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (populated places)
  • Places where underground water flows naturally to the surface of the Earth. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (springs (hydrographic))
  • Pools of water and related structures used for spawning and growing of fish (that are subsequently used to stock lakes and streams). [USGS Circ 1048] (fisheries)
  • Projection of land extending into a body of water that prominently marks a change in or interrupts the coastal trend of that water body. [USGS Circ 1048] (capes)
  • Ravines or gorges cut deeply through mountain ridges, or between hills or mountains. [Glossary of Geology, 4th ed.] (gaps)
  • Regions of general uniform slope, comparatively level and of considerable extent. [USGS Circ 1048] (plains)
  • Regions of interaction between rivers and near-shore ocean waters, where tidal action and river flow mix fresh and salt water. These brackish water ecosystems shelter and feed marine life, birds, and wildlife.. [EPA Terms of Environment http://www.epa.gov/OCEPAterms/] (estuaries)
  • Regions on rectangular maps bounded by parallels of latitude and meridians of longitude, generally published in a series with prescribed scale. [Adapted from Glossary of Geology, 4th ed.] (map quadrangle regions)
  • Regions or areas bounded by drainage divides and occupied by drainage systems; specifically the tract of country that gathers water originating as precipitation and contributes it to a particular stream channel or system of channels, or to a lake, reservoir, or other body of water. [Glossary of Geology, 4th ed.] (drainage basins)
  • Regions rendered barren or partially barren by environmental extremes, especially by low rainfall. [USGS Circ 1048] (deserts)
  • Regions whose ecologic formations result from or are influenced by differences in climate. [Adapted from Glossary of Geology, 4th ed.] (climatic regions)
  • Relatively level areas within regions of greater relief. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (flats)
  • Relatively narrow, deep depressions with steep sides, the bottom of which generally has a continuous slope [NIMA GEONet Designation ... Definitions http://164.214.2.59/gns/html/desig.html] (canyons)
  • Relatively small coastal waterways connecting larger bodies of water or other waterways. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (guts)
  • Seas or areas in a sea that contain numerous islands; also, the island groups themselves. [Glossary of Geology, 4th ed.] (archipelagos)
  • Second-order divisions of a nation such as parishes, boroughs, counties, municipios, or judicial divisions, and independent cities such as those in Maryland, Missouri, Nevada, and Virginia. [Adapted from USGS Circ 1048] (countries, 2nd order divisions)
  • Sheltered areas of water where ships or other watercraft can anchor or dock. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (harbors)
  • Sites with notable fossil remains. (paleontological sites)
  • Sloping margins of, or the ground bordering, a stream, and serving to confine the water to the natural channel during the normal course of flow. [Glossary of Geology, 4th ed.] (banks (hydrographic))
  • Sloping shores along a body of water that is washed by waves or tides and is usually covered by sand or gravel. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (beaches)
  • Small areas covered with a dense growth of trees. [USGS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_appendixc.html] (woods)
  • Small deep flat-floored channels or gullies of an ephemeral stream or of an intermittent stream, usually with vertical or steeply cut banks. [Adapted from Glossary of Geology, 4th ed.] (arroyos)
  • Steep-sided, V-profile valley often heading in the continental shelf running down the continental slope, having tributaries and resembling unglaciated, river-cut land canyons. [Glossary of Geology, 4th ed.] (submarine canyons)
  • Stretches of water in canals, streams, or docks, enclosed by gates at each end, and used in raising and lowering boats as they pass from one water level to another. [Glossary of Geology, 4th ed.] (locks)
  • Strips of land (of indefinite width) that extend from the low-tide line inland to the first major change in landform features. [Adapted from Glossary of Geology, 4th ed.] (coastal zones)
  • Structures built to break the force of waves or to restrain or direct current so as to protect a breach, harbor, or other waterfront facility. [USGS Circ 1048] (breakwaters)
  • Structures designed to transport water from a remote source, usually by gravity. [USGS Circ 1048] (aqueducts)
  • Structures erected as memorials. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (monuments)
  • Structures erected in a sea primarily, but not exclusively, for the extraction of petroleum products. [Adapted from USGS Circ 1048] (offshore platforms)
  • Structures erected over a depression or obstacle to carry traffic. [USGS Circ 1048] (bridges)
  • Structures or groups of structures used for the sale of products and services. [USGS Circ 1048] (commercial sites)
  • Structures used to measure the condition of a hydrographic feature. [USGS Circ 1048] (gaging stations)
  • Structures used to protect a harbor or shore, and serving also as a promenade or as landing places for vessels. [Glossary of Geology, 4th ed.] (piers)
  • Territory occupied by a large group of people organized under a single, usually independent government, and recognized as a country internationally. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (countries)
  • Towns or cities that are the official seats of government in a political entity, such as a state or nation. [American Heritage Dic. of the English Language, 4th ed.] (capitals)
  • Tracts of land smaller than a continent, surrounded by the water of an ocean, sea, lake or stream. [Glossary of Geology, 4th ed.] (islands)
  • Tracts or plots of the Earth's surface distinguishable by ownership. [USGS Circ 1048] (land parcels)
  • Treeless, level, or gently rolling plains characteristic of arctic or subarctic regions, having a permanently frozen subsoil, and usually supporting low growing vegetation such as lichens, mosses, and stunted shrubs. [USGS Circ 1048] (tundras)
  • Tropical regions of wild, tangled, dense vegetation. [Glossary of Geology, 4th ed.] (jungles)
  • Trough-shaped folds or downfolds in folded rock strata, the strata dipping towards a central axis. [Macmillan Encyc., 2001] (synclines)
  • Tubular conduits of substantial length, with pumps, valves, and control devices, for conveying fluids, gases, or finely divided solids. [USGS Circ 1048] (pipelines)
  • Underground or underwater passages. [USGS Circ 1048] (tunnels)
  • Vegetated areas that are inundated or saturated by surface or ground water for a significant part of the year. The vegetation is adapted for life in saturated soil conditions. [USGS Circ 1048] (wetlands)
  • Vents in the surface of the Earth through which magma and associated gases erupt; also, the forms or structures, usually conical, that are produced by the erupted material. [Glossary of Geology, 4th ed.] (volcanoes)
  • Very broad, flat-topped, usually isolated hills or mountains of moderate height bounded on at least one side by a steep cliff or slope and representing an erosion remnant. [Glossary of Geology, 4th ed.] (mesas)
  • Water facilities, including tanks, buildings, pumps, and pipes, that process water for cities, towns, or other municipalities. [Adapted from American Heritage Dic. of the English Language, 4th ed.] (waterworks)
 
Object id: 26
Item identifier(s):
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