美国地质调查局无人机系统(UAS) 2014年路线图

U.S.Geological Survey Unmanned Aircraft Systems(UAS)Roadmap 2014 By Jill Cress,Michael Hutt,Jeff Sloan,Mark Bauer,Mark Feller and Susan Goplen Open-File Report 2015-1032 U.S.Department of the Interior U.S.Geological Survey