2018 Map of Petit Bois Island

About this map

Petit Bois Island stretches across the center of this coastal survey, forming a critical part of the Gulf Islands National Seashore. This barrier island environment, situated within the waters of the Gulf of Mexico, illustrates the shifting maritime boundaries between Alabama and Mississippi. The state line divides the open water, where Mobile Co, Alabama, meets Jackson Co, Mississippi. To the northeast, the western edge of Dauphin Island appears near the interstate maritime border. The presence of the Intracoastal Waterway to the north signifies the importance of these sheltered waters for regional navigation and transit. This 2018 record captures the precise shoreline and sandbar configurations of the islands before subsequent storm seasons altered their fragile coastal morphology.