Digital Shoreline Analysis System version 4.3 Transects with Short-Term End Point Rate Calculations for Louisiana

Publication Date

2017

Time Period

2016

Himmelstoss, E.A., Kratzmann, M.G., and Thieler, E.R., 2017, National assessment of shoreline change – A GIS compilation of updated vector shorelines and associated shoreline change data for the Gulf of Mexico: U.S. Geological Survey data release, https://doi.org/10.5066/F78P5XNK.

This dataset consists of short-term (~30-year) end point shoreline change rates for the Louisiana coastal region from the Chandeleur Islands to Raccoon Point, on Isles Dernieres at the mouth of Caillou Bay, where fewer than three shoreline positions were available for the short-term time period (1960 and later). Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.3, an ArcGIS extension developed by the U.S. Geological Survey. The two shorelines must cover a distance greater than 1 kilometer to be included. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate short-term rates.

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• USGS Data Release Products