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

• Main Author: U.S. Geological Survey
• Format: Dataset
• Language: unknown
• Published: USGS Science Data Catalog 2016
• Subjects: elevation; Lidar; Light Detection and Ranging; LAS Point Cloud; Bathymetry; Topobathy; DEM; Digital Elevation Model; Intensity Image; LAZ; LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION; OCEAN > COASTAL PROCESSES > BARRIER ISLANDS; OCEAN > COASTAL PROCESSES > BEACHES; OCEAN > COASTAL PROCESSES > SHORELINE DISPLACEMENT; DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR; LIDAR > LIGHT DETECTION AND RANGING; distributions; bathymetry and elevation; altimetry; topographic mapping; LIDAR; topography; digital elevation models; Breton Island; Gosier Islands; Plaquemines Parish; Louisiana; Gulf of Mexico; Barrier Islands
• Online Access: https://search.dataone.org/view/339c8cca-d1af-4898-af82-5c6441788b58

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.