Aerial photomosaic of John Day Reservoir, 1966

A two-week field operation was conducted in the John Day Reservoir on the Columbia River to image the floor of the pool, to measure the distribution and thickness of...本研究于哥伦比亚河上的约翰·戴水库（John Day Reservoir）开展了为期两周的野外作业，旨在对该库区池底进行成像，并测量……的分布与厚度。