Ground elevation refers to the height of the earth’s surface above a standard reference point, typically mean sea level. This measurement is used in various fields such as construction, aviation, and environmental science to understand the topography of the land, plan infrastructure, or navigate aircraft. Ground elevation can vary significantly from place to place due to geographical features like mountains, valleys, and plains.
The formula to calculate the Ground Elevation (GE) is:
\[ GE = ASL - D \]
Where:
Let's say the altitude above sea level (ASL) is 500 meters and the depth below the reference point (D) is 50 meters. Using the formula:
\[ GE = ASL - D = 500 - 50 = 450 \text{ meters} \]
So, the Ground Elevation (GE) is 450 meters.
Definition: Calculates the elevation of a point above sea level.
Formula: \( E = H - D \)
Example: \( E = 1500 - 200 \)
Definition: Calculates the elevation of a point based on its geographic coordinates.
Formula: \( E = f(\text{latitude}, \text{longitude}) \)
Example: \( E = f(43.7, -79.4) \)
Definition: Calculates the average grade of elevation over a distance.
Formula: \( G = \frac{\Delta E}{D} \times 100 \)
Example: \( G = \frac{50}{200} \times 100 \)
Definition: Calculates the grade of elevation between two points.
Formula: \( G = \frac{\Delta E}{D} \times 100 \)
Example: \( G = \frac{30}{150} \times 100 \)
