The elevation of land is measured from sea level, considered zero. Methods include using altimeters, which gauge air pressure changes, GPS devices that calculate elevation from satellite data, and traditional surveying techniques, which involve measuring angles and distances from a known reference point to determine the height above sea level.
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The elevation of land is measured from sea level, which is taken as zero. Methods include altimeters, which use air pressure variations to gauge elevation, and GPS devices, which calculate elevation from satellite data. Traditional surveying techniques involve instruments like theodolites to measure angles and distances from a known reference point. These methods determine the height above sea level, providing accurate elevation data essential for mapping, construction, and scientific research, ensuring precision in understanding and utilizing the Earth’s topography.