Lake Pontchartrain dominates this maritime survey, covering nearly the entire quadrangle with the open waters of Louisiana's largest lake. The map reflects a modern digital perspective from the U. S. Geological Survey, focusing on hydrographic data and coordinate systems rather than terrestrial settlements. In the upper left corner, a small sliver of shoreline is visible, providing a rare point of reference for the vast aquatic expanse that separates the north and south shores of the basin. This map serves as a clean record of the lake's boundaries as they existed in the early twenty-first century, useful for those studying shoreline changes or navigating the central waters of the lake north of the Bonnet Carré Spillway area.
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This is the sole edition of this map. No revisions or reprints were ever made.
1891 · Spanish Fort
USGS Topo · 1:62,500
1892 · Bonnet Carre
USGS Topo · 1:62,500
1935 · Laplace
USGS Topo · 1:31,680
1935 · Covington
USGS Topo · 1:62,500
1935 · Ponchatoula
USGS Topo · 1:62,500
1936 · Ruddock
USGS Topo · 1:31,680
1936 · Bonnet Carre
USGS Topo · 1:62,500
1936 · Spanish Fort
USGS Topo · 1:62,500
1938 · La Branche
USGS Topo · 1:31,680
1938 · Indian Beach
USGS Topo · 1:31,680