Maximum Elevation Figures (MEF) are based on which geographic measurements?

Maximum Elevation Figures (MEF) are derived from geographic measurements involving latitude and longitudinal coordinates. These figures represent the highest known elevation within a specific area, accounting for terrain features and obstacles that could impact aircraft navigation and safety. By using latitude and longitude, MEFs provide a precise geographical context for pilots, allowing them to understand elevation changes and navigate effectively over various terrains.

This geographic coordinate system is essential for accurately mapping out flight routes and ensuring that MEF information is integrated into navigation planning. Vertical distance alone, the other options, or airspeed adjustments do not encompass the comprehensive understanding that geographic coordinates provide, as these elements play a limited role compared to the detailed elevation profiles offered by latitude and longitude.