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The concept was originally popularized by a map posted on Reddit in 2013, made by a Texas ESL teacher named Ken Myers, whose username on the site gave the figure its name. [4] Myers's original circle covers only about 10% of the Earth's total surface area, with a radius of around 4,000 kilometers (2,500 miles), centered in the South China Sea. [1]
The NRQZ includes portions of West Virginia and Virginia and a small part of Maryland. The National Radio Quiet Zone (NRQZ) is a large area of land in the United States designated as a radio quiet zone, in which radio transmissions are restricted by law to facilitate scientific research and the gathering of military intelligence.
The studio zone was formally first established in 1934, originally defined as a 6-mile (9.7 km) radius from Rossmore Avenue and 5th Street. By 1970, the center of the zone became Beverly and La Cienega boulevards in the Beverly Grove, Los Angeles neighborhood, the then-headquarters of the Association of Motion Picture and Television Producers ...
A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries). The use of a geofence is called geofencing , and one example of use involves a location-aware device of a location-based service (LBS) user entering or exiting a geofence.
Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).
Satellite image of the reactor and surrounding area in April 2009. The Chernobyl Nuclear Power Plant Zone of Alienation, [a] also called the 30-Kilometre Zone or simply The Zone, [5]: p.2–5 [b] was established shortly after the 1986 Chernobyl disaster in the Ukrainian SSR of the Soviet Union.
The Mercator projection and its use on a world map. This projection first came into use in the 16th century by the Dutch. A circle of latitude or line of latitude on Earth is an abstract east–west small circle connecting all locations around Earth (ignoring elevation) at a given latitude coordinate line.
Each of the 60 zones uses a transverse Mercator projection that can map a region of large north-south extent with low distortion. By using narrow zones of 6° of longitude (up to 668 km) in width, and reducing the scale factor along the central meridian to 0.9996 (a reduction of 1:2500), the amount of distortion is held below 1 part in 1,000 ...