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Coverage map. Coverage maps are designed to indicate the service areas of radiocommunication transmitting stations. Typically these may be produced for radio or television stations, for mobile telephone networks and for satellite networks. Such maps are alternatively known as propagation maps. For satellite networks, a coverage map is often ...
Radar charts can distort data to some extent, especially when areas are filled in, because the area contained becomes proportional to the square of the linear measures. For example, in a chart with 5 variables that range from 1 to 100, the area contained by the polygon bounded by 5 points when all measures are 90, is more than 10% larger than ...
Coverage noticer. A coverage noticer is a device that beeps (or vibrates) when in a zone that lacks coverage (white spot). This is fundamental for critical services (security, emergency and so on). When the user goes to a covered area, the noticer ceases beeping. Similarly coverage maps are often used to visualize coverage, these are produced ...
PECO Building. Philadelphia, Pennsylvania, U.S. Parent. Exelon. Website. peco.com. PECO, formerly the Philadelphia Electric Company, is an energy company founded in 1881 and incorporated in 1929. [1] It became part of Exelon Corporation in 2000 when it merged with Commonwealth Edison 's holding company Unicom Corp.
Sectional charts are in 1:500,000 scale and are named for a city on the map. The Federal Aviation Administration (FAA) in the United States publishes over 50 charts covering the continental United States, Alaska, and Hawaii. Sectional charts are published by the National Aeronautical Navigation Services Group of the FAA.
An aeronautical chart is a map designed to assist in the navigation of aircraft, much as nautical charts do for watercraft, or a roadmap does for drivers. Using these charts and other tools, pilots are able to determine their position, safe altitude, best route to a destination, navigation aids along the way, alternative landing areas in case of an in-flight emergency, and other useful ...
William Playfair is usually credited with inventing the area charts as well as the line, bar, and pie charts.His book The Commercial and Political Atlas, published in 1786, contained a number of time-series graphs, including Interest of the National Debt from the Revolution and Chart of all the Imports and Exports to and from England from the Year 1700 to 1782 that are often described as the ...
Sea areas enclosed north of METAREA XI and west of METAREA XII; also all Arctic waters from 170°W westwards to 20°E: METAREA XIV: New Zealand: Fiji (for area north of latitude 25°S) The South Pacific and Southern Oceans south of the equator, bounded by METAREA X to the west, the equator to the north and 120°W to the east METAREA XV: Chile ...
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