| 基于等高线表面估计法的LIDAR数据DEM提取 |
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| 引用本文： | 任自珍,岑敏仪,张同刚,周国清. 基于等高线表面估计法的LIDAR数据DEM提取[J]. 测绘科学, 2008, 33(6): 21-22,38 |
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| 作者姓名： | 任自珍 岑敏仪 张同刚 周国清 |
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| 作者单位： | 西南交通大学土木工程学院，Department of Engineering and Technology，Old Dominion University |
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| 摘 要： | 本文采用了一种新的利用LIDAR数据提取数字高程模型(DEM)的方法。该方法首先由原始LIDAR数据内插生成数字表面模型(DSM),然后根据DSM等高线闭合及相交情况,将等高线分为非地面等高线和地面等高线,最后内插地面等高线生成当前DEM,并采用迭代逼近的方法进行精化,生成最终的DEM。实验证明该方法可以适用于有一定起伏的地形表面,而且该方法原理简单,计算量小,切实可行。
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| 关 键 词： | 激光雷达 数字表面模型 数字高程模型 等高线 |
A meathod for extracting DEM from LIDAR data |
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| Abstract: | This paper presents a new method to extract DEM from LIDAR data.The method mainly consists of three steps:a DSM from original LIDAR data by interpolation is generated firstly.Secondly,DSM contours are separated to terrestrial contours and non-terrestrial contours according to their closing and intersection.Finally,an initial DEM is made by interpolating terrestrial contours and refined by iterative method.The experimental results show that the proposed method is a simple,little calculation,and practical one,and can be used in undulated terrain area. |
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| Keywords: | LIDAR DSM DEM contours |
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