关键词: 嵌入式环境, 数字高程模型, 装载, 地形显示, 计算机图形

Abstract:

Terrain models are widely used in the fields of aerospace exploration as well as civil and military aviation, such as war field simulation, flight visualization, characteristics matching, special effects in movies and televisions, etc. This article presents a new concept called the sub dataset and proposes an algorithm to realize its data loading rapidly by means of the indexes of flight parameters and longitude and latitude information. By means of this method large scale digital elevation model (DEM) data are loaded and rendered real-time, smoothly and rapidly. Now the method has been used on embedded platform and accomplished some flight emulation experiments.

Key words: embedded environment, digital elevation model, loading, terrain visualization, computer graphics