The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid , a mathematical model of the Earth 's sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum ). The term elevation is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
9-467: (Redirected from S-18 ) S18 may refer to: Aviation [ edit ] Forks Airport , in Clallam County, Washington, United States Letov Š-18 , a Czechoslovak biplane trainer Rans S-18 Stinger II , an American ultralight Saab 18 , a Swedish bomber and reconnaissance aircraft Sikorsky S-18 , a Russian biplane Spalinger S.18 ,
18-462: A Geographic Information System (GIS), digital elevation models (DEM) are commonly used to represent the surface (topography) of a place, through a raster (grid) dataset of elevations. Digital terrain models are another way to represent terrain in GIS. USGS (United States Geologic Survey) is developing a 3D Elevation Program (3DEP) to keep up with growing needs for high quality topographic data. 3DEP
27-589: A postcode district in Dronfield, England [REDACTED] Topics referred to by the same term This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=S18&oldid=1122861790 " Category : Letter–number combination disambiguation pages Hidden categories: Short description
36-835: A Swiss sailplane Thorp S-18 , an American homebuilt aircraft Rail and transit [ edit ] Forch railway , a line of the Zürich S-Bahn Ichinoe Station , in Edogawa, Tokyo, Japan Iyo-Ōzu Station , in Ōzu, Ehime Prefecture, Japan Naruko Kita Station , in Tempaku-ku, Nagoya, Aichi Prefecture, Japan Tanimachi Kyūchōme Station , in Ikutamamaemachi, Tennōji-ku, Osaka, Japan Yoichi Station , in Yoichi, Hokkaido, Japan Vessels [ edit ] HMS Otus (S18) ,
45-709: A submarine of the Royal Navy SMS ; S18 (1912) , a torpedo boat of the Imperial German Navy USS ; S-18 (SS-123) , a submarine of the United States Navy Other uses [ edit ] 40S ribosomal protein S18 County Route S18 (California) , United States S18: Handle and open container with care , a safety phrase S-18 85 mm gun , a Soviet tank gun S18,
54-421: Is a computer system that allows for visualizing, manipulating, capturing, and storage of data with associated attributes. GIS offers better understanding of patterns and relationships of the landscape at different scales. Tools inside the GIS allow for manipulation of data for spatial analysis or cartography. A topographical map is the main type of map used to depict elevation, often through contour lines . In
63-801: Is different from Wikidata All article disambiguation pages All disambiguation pages Forks Airport Forks Airport ( FAA LID : S18 ) is a city-owned, public-use airport located one nautical mile (1.85 km) southwest of the central business district of Forks , a city in Clallam County , Washington , United States. It was formerly known as Forks Municipal Airport . Forks Airport covers an area of 72 acres (29 ha) at an elevation of 299 feet (91 m) above mean sea level . It has one runway designated 4/22 with an asphalt surface measuring 2,400 by 75 feet (732 x 23 m). It's equipped with medium intensity runway lighting. Approaches to both ends of this runway are visual. For
72-465: The 12-month period ending December 31, 2008, the airport had 13,600 aircraft operations, an average of 37 per day: 99.6% general aviation and 0.4% military . At that time there were 10 aircraft based at this airport: 50% single- engine , 30% helicopter and 20% ultralight . Elevation Elevation is not to be confused with the distance from the center of the Earth. Due to the equatorial bulge ,
81-500: The summits of Mount Everest and Chimborazo have, respectively, the largest elevation and the largest geocentric distance. In aviation, the term elevation or aerodrome elevation is defined by the ICAO as the highest point of the landing area. It is often measured in feet and can be found in approach charts of the aerodrome. It is not to be confused with terms such as the altitude or height. GIS or geographic information system
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