North Islands sit at the lower reaches of this maritime survey in Saint Bernard Parish, Louisiana. This specific coastal area consists primarily of the expansive waters of Chandeleur Sound, an environment defined by its shifting aquatic boundaries rather than terrestrial settlements. The lack of infrastructure or inland features reflects the extreme outer reaches of the Mississippi River Delta's influence, where the gulf begins to dominate the landscape. For researchers of coastal change, this 2018 record provides a precise baseline of the shoreline and visible landmasses as they existed during that season's hydrographic data collection.
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1893 · Cat Island
USGS Topo · 1:62,500
1893 · Chandeleur
USGS Topo · 1:62,500
1951 · North Islands
USGS Topo · 1:24,000
1951 · New Harbor Islands
USGS Topo · 1:24,000
1951 · Freemason Island
USGS Topo · 1:24,000
1951 · Chandeleur Light
USGS Topo · 1:24,000
1953 · Mobile
USGS Topo · 1:250,000
1957 · Mobile
USGS Topo · 1:250,000
1957 · Breton Sound
USGS Topo · 1:250,000
1960 · Mobile
USGS Topo · 1:250,000