2014-2015 lidar survey of the McMurdo Dry Valleys, Antarctica

Airborne lidar data were collected with the Optech Titan multispectral sensor of the McMurdo Dry Valleys, Antarctica during the austral summer of 2014-2015 as part of an effort to understand geomorphic changes over the past decade. Lidar point density varied from 2 to >10 returns per m² with an average of about 5 returns per m². Vertical and horizontal accuracies are estimated to be 0.07 m and 0.03 m, respectively. The lidar coverage comprises roughly 3600 km² with includes the bottoms and sides of Taylor, Pearse, Wright, Victoria, Mckelvey, Barwick, and Valham valleys, Bull Pass, in addition to other ad hoc regions nearby including the Pegasus flight facility and two regions on Ross Island, McMurdo Station/Scott Base (and surroundings), and the coastal margin between Cape Royds and Cape Evans.<br><br>A detailed description of the survey can be found in the Earth System Science Data publication <a href=\"https://doi.org/10.5194/essd-9-435-2017\">High-resolution elevation mapping of the McMurdo Dry Valleys, Antarctica, and surrounding regions</a> (Fountain et al., 2017).<p><br>Publications associated with this dataset can be found at <a href=\"http://calm.geo.berkeley.edu/ncalm/dtc.html\" target=\"_blank\">NCALM's Data Tracking Center</a></p>

2014-2015年南半球夏季，研究团队使用Optech Titan多光谱传感器，在南极麦克默多干谷（McMurdo Dry Valleys）区域采集机载激光雷达（lidar）数据，本数据集作为探究近十年地貌变化研究的组成部分。激光雷达点云回波密度介于每平方米2次至10次以上，平均密度约为每平方米5次回波。经估算，本数据集的垂直精度与水平精度分别为0.07米与0.03米。本次激光雷达覆盖范围总计约3600平方千米，涵盖泰勒谷（Taylor Valley）、皮尔斯谷（Pearse Valley）、赖特谷（Wright Valley）、维多利亚谷（Victoria Valley）、麦凯尔维谷（Mckelvey Valley）、巴里克谷（Barwick Valley）与瓦尔汉谷（Valham Valley）的谷底与坡岸，布尔山口（Bull Pass），以及周边其他临时调查区域，包括飞马座飞行设施（Pegasus flight facility）、罗斯岛（Ross Island）上的两处区域、麦克默多站/斯科特基地（McMurdo Station/Scott Base）及其周边区域，以及罗伊兹角（Cape Royds）与埃文斯角（Cape Evans）之间的海岸带。

本调查的详细描述可参阅《地球系统科学数据（Earth System Science Data）》期刊发表的论文《南极麦克默多干谷及周边区域高精度高程制图》（Fountain等，2017），论文链接：https://doi.org/10.5194/essd-9-435-2017。

与本数据集相关的研究成果可在NCALM数据跟踪中心（NCALM's Data Tracking Center）查询，链接：http://calm.geo.berkeley.edu/ncalm/dtc.html。