1935 Map of Grand Island Pass
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1935 Map of Grand Island Pass

USGS Topo · Published 1935

About this map

Lake Borgne and the Mississippi Sound meet in this 1935 coastal survey, depicting the complex brackish marshlands along the Louisiana and Mississippi border. Compiled from aerial photographs taken by the Air Corps, the map captures the intricate hydrology of the Grand Island Pass area before modern coastal erosion significantly altered these shorelines. The landscape is dominated by tidal features and small landmasses like Grassy Id and Lower Pt Clear, which served as critical navigation markers for mariners traversing the inner passage between the two states.


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Map Details

Date Portrayed1935
Date Published1935
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:31,680
Physical Dimensions17.9 x 20.7 inches

Editions of this 1935 Grand Island Pass Map


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Source Details

CopyrightPublic Domain