一种基于高程数据的全球地形高度检测方法  

A global terrain height detection method based on elevation data

作　　者：吴琼 孙韶杰 于澜 苏迪 Wu Qiong;Sun Shaojie;Yu Lan;Su Di(Special Service Research Institute of Air Force Research Institute,Beijing 100195,China;Air Force Flight Simulation Training Base of Shijiazhuang Flight College,Beijing 100195,China)

机构地区：[1]空军研究院特种勤务研究所,北京100195 [2]空军石家庄飞行学院飞行模拟训练中心,北京100195

出　　处：《网络安全与数据治理》2022年第7期88-92,共5页CYBER SECURITY AND DATA GOVERNANCE

摘　　要：在飞行模拟器训练领域,很多分系统都需要实时获取飞行位置的地形高度。基于卫星影像高程数据,提出了一个全球范围的地形高度检测方法。该方法将全球高程数据按度进行区域划分和规范化命名,然后基于碰撞检测的思想,从飞行当前位置垂直向下求取与地形面的交点,交点处的高程值即地形高度。针对不同采样间距、不同分块大小情况下的算法检测效率进行了比较分析,实验结果表明,该检测方法能够较好地满足实时性和准确性要求。In the field of flight simulation training,many subsystems require real-time access to the terrain height of current flight location.Based on satellite imagery elevation data,this paper proposed a worldwide terrain height detection method.Firstly the worldwide elevation data is divided to many blocks according to the degree and is named normatively.Then based on the idea of collision detection,intersection point is calculated from the current flight position vertically downward to the terrain surface,and the elevation value at the intersection point is the terrain height.For different sampling interval and different blocking size,the detection efficiency of our algorithm was compared and analyzed.Experimental results show that the proposed detection method can better meet the real-time and accuracy requirements.

关 键 词：高程数据 地形高度 全球 检测 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]