Transects_BackBarrier.shp - Digital Shoreline Analysis System version 4.3 Transects with Linear Regression Rate Calculations for the Back-Barrier (North-Facing) coast of Dauphin Island, Alabama.

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: July 18, 2025 | Last Modified: 20201013

Rates of shoreline change for Dauphin Island, Alabama were generated for three analysis periods, using two different shoreline proxy datasets. Mean High Water line (MHW) shorelines were generated from 14 lidar datasets (1998-2014) and Wet Dry Line (WDL) shorelines were digitized from ten sets of georeferenced aerial images (1940-2015). Rates of change were generated for three groups of shorelines: MHW (lidar), WDL (aerial) and MHW and WDL shorelines combined. These data will aid in developing an understanding of the evolution of the barrier island position, size and shape as well as documenting spatially-variable patterns in erosion and accretion of different sections of the island.

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AL Accretion Alabama Coastal DSAS Dauphin Island Digital Shoreline Analysis System (DSAS) Georeferenced Aerial Imagery Gulf of Mexico Historic Shoreline Linear Regression Rate Long-Term Shoreline Change Rate Mean High Water (MHW) SPCMSC Shoreline Shoreline Change St. Petersburg Coastal and Marine Science Center Transects U.S. Geological Survey USA USGS USGS:29d0ccfd-69d6-4b33-84b6-20ea299fc71d Vectorization Wet Dry Line (WDL) boundaries coastal processes elevation environment erosion geology geomorphology geoscientificInformation lidar oceans unconsolidated deposits

Complete Metadata

@id	http://datainventory.doi.gov/id/dataset/66de9e949ba0f2822929682f0ccc2e95
bureauCode	[ "010:12" ]
identifier	USGS:29d0ccfd-69d6-4b33-84b6-20ea299fc71d
spatial	-88.348139346,30.2255479635,-88.086133824,30.286844286
theme	[ "geospatial" ]

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