Historical bathymetry soundings between 1916 and 1920 around the Mississippi and Alabama barrier islands

Online link https://cmgds.marine.usgs.gov/catalog/spcmsc/1916_1920_MSAL_NAD83NAVD88g12B_XYZ_metadata.faq.html
Description In order to characterize coastal change, historical maps and complementary records were compiled including: topographic sheets (T-sheets), hydrographic sheets (H-sheets, smooth sheets), shorelines, and bathymetric soundings surrounding the Mississippi and Alabama (MSAL) barrier islands. One goal of this work was to create a time-series of bathymetric change maps around the islands between 1916 and 2016.
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