2018 Map of Western Isles Dernieres

About this map

Isles Dernieres forms a narrow, vulnerable chain of barrier islands off the coast of Terrebonne Parish, acting as a critical buffer for the Louisiana mainland. This survey documents the specific footprint of Raccoon Island and its westernmost extremity at Raccoon Point as they appeared in 2018. The map illustrates the separation of these landforms from the interior by the waters of Caillou Bay and the tidal passage known as Coupe Colin. This remote coastal landscape is defined by its exposure to the open Gulf of Mexico, where land and sea are in a constant state of flux. The inclusion of Public Land Survey System grids like t24s r15e provides a legal framework for these shifting sands, showing how township and range lines extend across the maritime environment.