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The water level at each end of the tube will be at the same elevation, whether the two ends are adjacent or far apart, so a line between them will be horizontal at its midpoint and a shed base, building foundation or similar structure laid out using several such lines will be "horizontal" within building tolerances on any scale over which use ...
The island's tallest natural point is Jayne's Hill near Melville, with an elevation of 400.9 feet (122.2 m) above sea level. Long Island is separated from the mainland by the East River, not in fact a river, but a tidal strait. Long Island Sound forms the northern boundary of the island.
A chart datum is the water level surface serving as origin of depths displayed on a nautical chart and for reporting and predicting tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. [1] Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW).
Vertical datums in Europe. In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features (terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation.
Long Island's professional soccer club, the New York Cosmos, play in the Division 2 North American Soccer League at James M. Shuart Stadium in Hempstead. Long Island has historically been a hotbed of lacrosse at the youth and college level, which made way for a Major League Lacrosse team in 2001, the Long Island Lizards.
In 1825, Long Island historian Silas Wood called it "Oakley's High Hill Field" with a surveyor telling him it was 354.5 feet (108.1 m). [5] At the time it was considered the third highest point on Long Island behind Harbor Hill in Nassau County (reported then at 384 feet (117 m)) and Layton's Hill in Wheatley, New York (just south of the Long ...
Hoffman Island was created in 1873 from Orchard Shoals. It was named for former New York City mayor (1866–1868) and then-current New York Governor (1869–1871) John T. Hoffman. Hoffman Island covers 11 acres (4.45 hectares). Swinburne Island, with an area of about 4 acres (16,000 m 2), lies immediately to the south. [2]
The Bureau of Water and Sewer Operations operates and maintains the water supply and sewerage system. It is also responsible for the operation of the Staten Island Bluebelt, a natural alternative to storm sewers, which occupies approximately 15 square miles (39 km 2) of land in the South Richmond area of Staten Island.