Method and device for providing on the basis of clinical memorized a dynamic image of a surface, such as the ground, a view of a mobile observation point.

摘要

The view of the terrain in a direction VIS from an aircraft (10) is displayed on a CRT screen. The screen image is constructed using local terrain height data stored in a computer memory and present position information from the aircraft's navigation system. The screen shows a representation of a cross-section (16) of a cone of vision (122) in the direction VIS. A set of planes (128j), each containing the vertical axis Aa through the observation point, is considered. Each plane is defined by a bearing angle. A set of points (Mij) in each plane is then considered, each point being defined by an elevation angle. A mark is displayed on the appropriate part of the screen for each point (Mij) not hidden from the observation point by intervening terrain.