2020 Map of South of Belle Isle

About this map

The Gulf of Mexico dominates this coastal survey of the waters south of Belle Isle in St. Mary Parish. The map documents a landscape of shifting aquatic channels and maritime passages at the edge of the Louisiana coast. Key navigational markers include New Pass and the Ann Channel, which characterize the transition from the inner marshes to the open sea. This record captures the precise bathymetric and hydrographic state of these Louisiana waters in the early twenty-first century, serving as a critical reference for understanding the coastline before future deltaic changes or environmental shifts.