Geodesy and Cartography
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Steve2222
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GEOGRAPHY
Geodesy and Cartography
GPS Coordinates and World Geodetic System
The World Geodetic System 84 underpins every GPS location on Earth with centimeter-level precision
5 Feb 2026
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What is the primary purpose of the World Geodetic System (WGS 84) in GPS technology?
To create detailed street maps for urban areas
To provide a standardized, Earth-centered coordinate system for accurate global positioning
To measure only magnetic fields without considering Earth's shape
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Steeeve
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GEOGRAPHY
Geodesy and Cartography
Airy Transit Circle
The Airy Transit Circle established the Greenwich Meridian, the world's prime meridian for navigation and time
31 Jan 2026
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What was the primary function of the Airy Transit Circle at the Royal Observatory in Greenwich?
To measure the Earth's magnetic field variations
To serve as a telescope for deep space observations
To observe stars crossing the local meridian for precise longitude determination
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