1998 Map of Freemason Island

About this map

Freemason Island sits as a narrow, crescent-shaped landform within the expansive waters of Chandeleur Sound in this late-twentieth-century topographical survey. The map details a landscape defined almost entirely by bathymetry and shifting maritime features, documenting the precise contours of Shoalwater Bay and the submerged hazards of Old Harbor Island Shoal. This quadrangle covers a known subsidence area, and the comparison between the 1950 topography and 1998 imagery highlights the volatile nature of the Louisiana coastline. For those studying coastal geomorphology or the evolution of the Chandeleur Islands, this sheet provides a specific record of the island's footprint before the significant erosional events of the early 2000s.