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GNIS-H COVERAGE INFORMATION
------------------------------------------------------------------------ Coverage Type point Topology point Sources US Geological Survey GNIS-H contains names and point locations of most hydrologic features shown on USGS 1:24,000 scale quadrangles. Some features, such as rivers and streams, had multiple coordinates, but only the first set were used for this point cover. Because of this single point characteristic, river and stream points are generally at the outflow location. Data for this coverage were developed from the USGS GNIS-CD (1991). Approximate size of exported file 2,509 kB per entire coverage ------------------------------------------------------------------------ [Image] GNIS-H CODING SHEET[Image] ------------------------------------------------------------------------ POINT Coding Codes Description COUNTY Name of county feature occurs in. DECILAT Latitude in decimal degrees. DECILONG Longitude in decimal degrees. ELEVATION Elevation of feature (not filled in for all features). NAME Name as listed in original USGS file. NAME2 Value of name item changed to as it appears on map (e.g., Waldo, Mount changed to Mount Waldo). TYPE Type of hydrographic feature named. Indentation of a coast or shore line enclosing a part of a body bay of water; a body of water partly surrounded by land; (arm, bight, cove, estuary, gulf, inlet, sound); 1113 items total Curve in the course of a stream and/or the land within the bend curve; a curve in a linear body of water; (meander, bottom); 10 items total falls Perpendicular or very steep fall of water in the course of a stream; (waterfall, cataract, cascade); 101 item total gut Relatively small coastal waterway connecting larger bodies of water or other waterways; (slough, creek, inlet); 22 items total harbor Sheltered area of water where ships or other water craft can anchor or dock; (port, roads, roadstead); 6 items total lake Natural body of inland water; (pond, backwater, lagoon, laguna, pool, resaca, lac, waterhole); 2934 items total rapids Fast-flowing section of a stream, often shallower and with exposed rock or boulders; (ripple, riffle); 80 items total reservoir Artificially impounded body of water; (tank, lake); 115 items sea Large body of salt water; (gulf, ocean); 1 item total spring Place where underground water flows naturally to the surface of the Earth; (seep); 18 items total Linear body of water flowing on the Earth's surface; (creek, stream river, anabranch, distributary, branch, run, slough, bayou, pup, brook, fork, kill, rio); 3929 items total Poorly drained wetland, fresh or saltwater, wooded or grass swamp possibly covered with open water; (marsh, bog, cienaga, marais, pocosin); 327 items VNAME Varient name(s) of feature. |
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