Topobathymetric Lidar Survey of Breton and Gosier Islands, Louisiana, January 16 and 18, 2014

This dataset contains binary point-cloud data, produced from remotely sensed, geographically referenced topobathymetric measurements collected by Photo Science, Inc., encompassing the Breton and Gosier Island, LA study areas. The original area of interest was buffered by 100 meters to ensure complete coverage, resulting in approximately 75 square miles of lidar data.
The Breton Island Lidar project called for the planning, acquisition, processing, and derivative products of topobathymetric lidar data, collected at a nominal pulse spacing (NPS) of 0.5-0.45 meters (4-5 points/square meter). Lidar acquisition was prioritized to coincide with the lowest tide possible. Water clarity was also assessed and deemed acceptable prior to acquisition flights. The data, in meters, are projected to UTM Zone 16 North and referenced horizontally to the NAD83 (2011) datum and vertically to the NAVD88 (GEOID12A) datum. The classified point-cloud data were delivered in LAS v1.2 format and the merged DEM was converted to a GeoTIFF file. Each LAS file contains data in a 1-kilometer by 1-kilometer tile named according to the US National Grid conventions. The final product was a LAZ file for Breton Island and another for Gosier Islands.

本数据集包含二进制点云数据，其源自Photo Science, Inc.采集的遥感地理参考地形测深测量数据，覆盖路易斯安那州（LA）布雷顿岛与戈西尔岛研究区域。原始感兴趣区域向外缓冲100米以确保完整覆盖，最终得到约75平方英里的激光雷达（LiDAR）数据。
布雷顿岛激光雷达项目要求开展地形测深激光雷达数据的规划、采集、处理及其衍生产品制作，该数据的标称脉冲间距（NPS）为0.5~0.45米（即每平方米4~5个点）。激光雷达采集工作优先安排在最低潮时段开展，采集飞行前还对水体透明度开展了评估，确认其满足作业要求。
本数据以米为单位，投影至通用横轴墨卡托（UTM）16北带，水平参考基准为NAD83（2011），垂直参考基准为NAVD88（GEOID12A）。分类后的点云数据以LAS v1.2格式交付，合并后的数字高程模型（DEM）被转换为GeoTIFF格式文件。每个LAS文件包含1千米×1千米的瓦片数据，其命名遵循美国国家网格规范。最终成果包括布雷顿岛对应的LAZ文件，以及戈西尔岛对应的LAZ文件。