Point cloud from low-altitude aerial imagery from unmanned aerial system (UAS) flights over Coast Guard Beach, Nauset Spit, Nauset Inlet, and Nauset Marsh, Cape Cod National Seashore, Eastham, Massachusetts on 1 March 2016 (LAZ file)

This point cloud was derived from low-altitude aerial images collected from an unmanned aerial system (UAS) flown in the Cape Cod National Seashore on 1 March, 2016. The objective of the project was to evaluate the quality and cost of mapping from UAS images. The point cloud contains 434,098,030 unclassifed and unedited geolocated points. The points have horizontal coordinates in NAD83(2011) UTM Zone 19 North meters, vertical coordinates in NAVD88 meters, and colors in the red-green-blue (RGB) schema. The points were generated in photogrammetric software (Agisoft Photoscan Professional v. 1.2.6) from 1122 digital images taken approximately 120 m above the ground with a Canon Powershot SX280 12-mexapixel digital camera mounted in a Skywalker X8 flying wing operated by Raptor Maps, Inc., contractors to the U.S. Geological Survey. The photogrammetric processing incorporated 30 ground control points. The entire, un-edited unclassified point cloud is provided in standard LAZ format. All activities were conducted according to Federal Aviation Administration regulations and under a National Park Service Scientific Research and Collecting Permit, study number CACO-00285, permit number CACO-2016-SCI-003. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

该点云数据源自2016年3月1日于科德角国家海岸（Cape Cod National Seashore）使用无人航空系统（unmanned aerial system, UAS）采集的低空航拍影像。本项目旨在评估基于无人航空系统影像进行测绘的质量与成本。该点云包含434,098,030个未分类、未编辑的地理定位点。这些点的水平坐标采用NAD83(2011) UTM第19北带米制单位，垂直坐标采用NAVD88米制单位，颜色遵循红-绿-蓝（red-green-blue, RGB）色彩模式。该点云由摄影测量软件（Agisoft Photoscan Professional v.1.2.6）处理生成，所用数据源为1122张地面上方约120米处拍摄的数码影像，影像由搭载于Skywalker X8飞翼无人机的佳能PowerShot SX280 1200万像素数码相机拍摄，该无人机由美国地质调查局（U.S. Geological Survey）的承包商Raptor Maps, Inc.运营。此次摄影测量处理共引入了30个地面控制点。完整未编辑、未分类的点云数据以标准LAZ格式提供。所有作业均遵循美国联邦航空管理局（Federal Aviation Administration）相关规定，并持有美国国家公园管理局（National Park Service）颁发的科学研究与采集许可，研究编号为CACO-00285，许可编号为CACO-2016-SCI-003。本内容中提及的商业名称、企业名称及产品名称仅用于描述用途，并不代表美国政府对此类产品或服务的背书。