Lake Pontchartrain dominates this 2020 aquatic survey, which captures the open water where three Louisiana parishes converge. The map is primarily a cartographic study of maritime boundaries, illustrating the precise lines where St. Tammany Parish, Tangipahoa Parish, and St. John the Baptist Parish meet in the middle of the basin. This perspective is vital for understanding regional jurisdiction over the lake's waters and the transition from the marshy shoreline in the north to the deep open water that defines this corner of the Gulf Coast region. Because the map focuses on the water, it highlights the intersection of Public Land Survey System designations such as t8s r9e and t8s r11e, providing a clear view of the underwater legal geography often missed on terrestrial sheets.
6 named features on this map. Tap any name to fly to it.
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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 · Covington
USGS Topo · 1:62,500
1935 · Ponchatoula
USGS Topo · 1:62,500
1936 · Bonnet Carre
USGS Topo · 1:62,500
1936 · Spanish Fort
USGS Topo · 1:62,500
1939 · Ponchatoula
USGS Topo · 1:62,500
1939 · Covington
USGS Topo · 1:62,500
1950 · Covington
USGS Topo · 1:62,500
1951 · Ponchatoula
USGS Topo · 1:62,500