Data Release

Coastal Land-Cover and Feature Datasets Derived from Landsat Satellite Imagery, Northern Chandeleur Islands, Louisiana

By Julie C. Bernier

USGS, St. Petersburg, Florida

Summary

This data release serves as an archive of coastal land-cover and feature datasets derived from Landsat satellite imagery at the northern Chandeleur Islands, Louisiana. To minimize effects of tidal water-level variations, 75 cloud-free, low-water images acquired between 1984 and 2019 were analyzed. Water, bare earth (sand), vegetated, and intertidal land-cover classes were mapped from Hewes Point to Palos Island using successive thresholding and masking of the modified normalized difference water index (mNDWI), the normalized difference bare land index (NBLI), and the normalized difference vegetation index (NDVI). Vector shoreline, sand, and vegetated feature extents were extracted for each image by contouring the spectral indices using the calculated threshold values. Barrier platform, beach, and vegetated widths were calculated from the intersection of the shoreline, sand, and vegetated vectors with transects spaced 300 m (10 pixels) apart alongshore.

Bernier, J.C., Miselis, J.L., Plant, N.G., 2021, Satellite-derived barrier response and recovery following natural and anthropogenic perturbations, Northern Chandeleur Islands, Louisiana: Remote Sensing, v. 18, no. 18 (special issue), art. 3779, 27 p., https://doi.org/10.3390/rs13183779.

Data

Suggested Citation

Bernier, J.C., 2021, Coastal land-cover and feature datasets extracted from Landsat satellite imagery, northern Chandeleur Islands, Louisiana: U.S. Geological Survey data release, https://doi.org/10.5066/P9HY3HOR.