Altitude measurement refers to the process of determining the height of an object or point in relation to sea level or ground level. This can be done using various methods, including barometric pressure measurements, GPS technology, and laser rangefinders. Each method has its own level of accuracy and is suitable for different applications, such as aviation, hiking, or scientific research. In aviation, altitude is crucial for flight safety and navigation. Pilots use altimeters, which measure air pressure, to determine their aircraft's altitude. In contrast, hikers may rely on handheld GPS devices to track their elevation while exploring mountainous terrain. Understanding altitude is essential for various fields, including meteorology and geology.