Coastal Single-Beam Bathymetry Data Collected in 2017 from the Chenier Plain, Louisiana

As part of the Louisiana Coastal Protection and Restoration Authority's Barrier Island Comprehensive Monitoring Program, scientist from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore single-beam bathymetry survey along the Chenier Plain, Louisiana from Marsh Island to Sabine Pass. The goal of the BICM program is to provide long-term data on Louisianas coastline and use this data to plan, design, evaluate, and maintain current and future barrier island restoration projects. The data described in this report will provide baseline bathymetric information for future research investigating island evolution, sediment transport, and recent and long term geomorphic change, and will support modeling of future changes in response to restoration and storm impacts. Over 3,300 line kilometers of single-beam data were acquired during two field missions, USGS Field Activity numbers 2017-323-FA, June 2-14, and 2017-324-FA, July 8-16, 2017 aboard 4 separate survey vessels. The final x,y,z data are provided in the native format of WGS84 G1150 (ITRF00), values ranging from -26.62m to -69.94m Ellipsoid height, as well as NAD83 NAVD 88 Geoid 12A, with values ranging from 0.00 to -42.19m. Supplemental data products include 200m cell-size interpolated bathymetry grids, trackline maps, Field Activity Collection System logs, x,y,z point data files and formal Federal Geographic Data Committee (FGDC) metadata.