Nadir videos taken during low-altitude transects of the Arctic Network of national park units and Selawik National Wildlife Refuge, Alaska, July 2013

Nadir videos shot from a GoPro Hero3 Black Edition (focal length 2.77 mm) of the arctic landscape during low altitude transects at the rate of 60 frames per second. Transects were conducted from small aircraft over the National Park Service’s Bering Land Bridge National Preserve and the U.S. Fish and Wildlife Service’s Selawik National Wildlife Refuge in northwest Alaska.本数据集涵盖由焦距(focal length)为2.77毫米的GoPro Hero3黑色版(GoPro Hero3 Black Edition)拍摄的天底视角(nadir)北极景观视频，拍摄于低空航测航线期间，帧率为60帧每秒。本次航测航线由小型航空器执行，覆盖阿拉斯加西北部的国家公园管理局(National Park Service)白令陆桥国家保留地，以及美国鱼类及野生动物管理局(U.S. Fish and Wildlife Service)塞拉威克国家野生动物保护区。