altitude measurement

Altitude measurement is determining how high an object is above a specific reference point, usually sea level. This is done using tools like altimeters, which can be barometric (measuring air pressure changes with elevation) or GPS devices that calculate position using satellite signals. As you ascend, air pressure decreases, allowing barometric altimeters to estimate altitude. GPS relies on satellite data to pinpoint exact positions and relative height. Accurate altitude measurement is essential for aviation, hiking, and mapping, helping ensure safety and precise navigation by understanding an object's elevation in relation to sea level or other reference points.