基于LiDAR数据特征的湖相层三维地理信息提取

doi:10.12082/dqxxkx.2018.170442

地球信息科学学报 ›› 2018, Vol. 20 ›› Issue (4): 489-495.doi: 10.12082/dqxxkx.2018.170442

• 全国激光雷达大会特约稿件 • 上一篇下一篇

基于LiDAR数据特征的湖相层三维地理信息提取

刘强^1,^2,³(), 傅学庆^2,³, 黄华芳^2,³, 党海燕², 于国超², 李仁杰^2,³, 张军海^2,³()

1. 河北师范大学地理学博士后科研流动站,石家庄 050024
2. 河北师范大学资源与环境科学学院, 石家庄 050024
3. 河北省环境演变与生态建设实验室,石家庄 050024

收稿日期:2017-09-21 修回日期:2018-02-26 出版日期:2018-04-20 发布日期:2018-04-20
作者简介:
作者简介：刘强（1985-）,男,博士,讲师,主要从事泥河湾环境考古三维古环境重建理论及应用研究。E-mail: liuqiangjp@163.com
基金资助:
河北省高等学校自然科学青年基金项目(QN2016251);河北师范大学博士启动基金;河北师范大学地理学博士后启动基金项目

Three-dimensional Geographic Information Extraction of Nihewan Lacustrine Sediments Based on LiDAR Data

LIU Qiang^1,^2,³(), FU Xueqing^2,³, HUANG Huafang^2,³, DANG Haiyan², YU Guochao², LI Renjie^2,³, ZHANG Junhai^2,³()

1. Postdoctoral research station of geography, Hebei Normal University, Shijiazhuang 050024, China
2. College of Resources and Environment Science, Hebei Normal University, Shijiazhuang 050024, China
3. Hebei Key Laboratory of Environmental Change and Ecological Construction , Hebei Normal University, Shijiazhuang 050024, China

Received:2017-09-21 Revised:2018-02-26 Online:2018-04-20 Published:2018-04-20
Supported by:
Natural Science Youth Fund Project of Hebei Education Department No.QN2016251;Doctor Start-up Fund of Hebei Normal University;Postdoctoral Startup Fund for Geography of Hebei Normal University.

摘要/Abstract

摘要：

泥河湾盆地的化石和旧石器遗址与泥河湾古湖、古河道有极强的相关性,如果发现了湖滨相和河流阶地的沉积地层,那么下一步很可能发现古人类活动留下来的化石和旧石器遗址。本文按照广义DEM的定义,将DEM的表达对象“地形表面”改为“泥河湾更新世湖相沉积层”称为湖相层DEM,泥河湾更新世湖相层DEM的建立可以大大推进泥河湾地区的古人类活动及古地理环境的研究。本文通过提取湖相层的三维地理信息,以禾尧庄剖面为例,研究了露头信息的泥河湾更新世湖相层三维地理信息提取方法。采用三维激光扫描仪采集剖面的三维地理信息,基于LiDAR点云的数据特征设计滤波方法,针对剖面采集点的距离近似相等,采用回波强度进行区分植被及土质,得到了一定的效果。在回波强度滤波后的结果基础上,进一步利用RGB信息设置阈值,区分植被和土质,得到了较好的效果。最后,经过手动去噪,得到干净、地层信息完整的剖面三维地理信息数据,可以做为湖相层DEM建模的基础数据。

关键词: 湖相沉积地层, 地面三维激光扫描, 点云特征, 禾尧庄遗址剖面, 泥河湾

Abstract:

The fossil and Paleolithic sites are strongly related to the ancient lakes and ancient rivers of Nihewan Basin. If the sedimentary formations of the lakeside facies and river terraces were discovered, then the next step is likely to find the fossils and Paleolithic sites of ancient human activities. The generalized definition of DEM as "terrain surface" is changed to " lacustrine sedimentary layer of the Nihewan basin" and named as Pleistocene lacustrine layer DEM. The establishment of the Pleistocene lacustrine layer DEM of Nihewan Basin can greatly promote the study on the ancient human activities and paleogeography in Nihewan area. In this paper, the first step of establishing the Pleistocene lacustrine layer DEM in Nihewan was studied. The three-dimensional geographic information of the lacustrine layer was extracted and the geological information of the Pleistocene lacustrine layer at the outcrop section of Heyaozhuang was studied as an example. The three-dimensional laser scanner was used to collect the three-dimensional geographic information of profile, and the filtering method was designed based on the LiDAR point cloud data. The distance between the sampling points was approximated and the echo intensity was used to distinguish the vegetation and the soil. On the basis of the result of the echo intensity filtering, the RGB information is used to set the threshold to further distinguish between the vegetation and the soil quality, and the better effect was obtained. After the final manual removal of noise, a clean and complete three-dimensional geographic information data of formation integrity can be obtained which can be used as the basic data for DEM modeling of lacustrine sediments.

Key words: lacustrine sediments, terrestrial 3D laser scanning, characteristics of point cloud, Heyaozhuang Site profile, Nihewan

刘强, 傅学庆, 黄华芳, 党海燕, 于国超, 李仁杰, 张军海. 基于LiDAR数据特征的湖相层三维地理信息提取[J]. 地球信息科学学报, 2018, 20(4): 489-495.DOI:10.12082/dqxxkx.2018.170442

LIU Qiang,FU Xueqing,HUANG Huafang,DANG Haiyan,YU Guochao,LI Renjie,ZHANG Junhai. Three-dimensional Geographic Information Extraction of Nihewan Lacustrine Sediments Based on LiDAR Data[J]. Journal of Geo-information Science, 2018, 20(4): 489-495.DOI:10.12082/dqxxkx.2018.170442

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基于LiDAR数据特征的湖相层三维地理信息提取

Three-dimensional Geographic Information Extraction of Nihewan Lacustrine Sediments Based on LiDAR Data

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