Elevation, topography, and depth are commonly measured in feet or meters, particularly in geographical contexts. Features such as mountains, valleys, and oceans are often quantified using these measurements to provide a standardized understanding of the Earth's surface. For example, the height of a mountain can be described in meters, like Mount Everest, which stands at approximately 8,848 meters (29,029 feet) above sea level. Similarly, ocean depths, such as the Mariana Trench, are often expressed in meters or feet, illustrating the vastness and complexity of Earth's geographical features.