Poudre River at Sheep Draw SfM Greeley, CO June 2020

In spring 2020, the world was hit by a pandemic that spread globally by March, causing universities and most of the world to move to remote means. Summer field camps, long hailed as a rite of passage in the geosciences, were cancelled throughout the US. The community moved quickly, with NAGT developing remote learning tools and arranging for sharing and collaboration between instructors and institutions. As such, UNAVCO (GETSI) and University of Northern Colorado embarked on a data collection campaign for a summer field course entitled “Geoscience Field Issues Using High-Resolution Topography to Understand Earth Surface Processes” – originally slated for in-person teaching. The team collected GNSS data, drone imagery for use in structure from motion, and terrestrial laser scanning from a site near Greeley, Colorado on the Poudre River. In an assignment, students conduct a Structure from Motion (SfM) survey of the Sheep Draw field site. The end product is a point cloud used in additional assignments to conduct analyses. This is the instructor-derived SfM point cloud.

2020年春季，全球范围内爆发了一场大流行病，至三月已蔓延至世界各地，导致大学及世界上的大多数地方转向远程教学方式。夏日野外考察营，长久以来被视为地球科学领域的一种成年礼，在美国全面取消。社区迅速作出反应，美国地质教师协会（NAGT）开发了远程学习工具，并安排了教师和机构之间的资源共享与合作。因此，UNAVCO（GETSI）与科罗拉多州格雷利的波德河附近的北方科罗拉多大学联合开展了一项夏季野外课程的数据收集活动，该课程原定于面对面教学，题为“利用高分辨率地形研究地球表面过程的地学野外问题”。研究团队收集了全球导航卫星系统（GNSS）数据、用于运动结构分析无人机影像，以及地面激光扫描数据。在作业中，学生进行了一场针对Sheep Draw野外场地的结构从运动（SfM）调查。最终产品是一个点云，用于后续作业中的分析。这是由教师生成的SfM点云。