
In 1944, Army Corps of Engineers geologist and cartographer Harold Fisk drew a series of maps depicting the wanderings of the Mississippi's meander channels. He relied on historic sources and geological evidence to determine the river's shifting location. The white areas of the maps depict the 1944 course of the river, while various colors show its earlier locations.
https://publicdomainreview.org/collection/maps-of-the-lower-mississippi-harold-fisk/
Modern research has compared Fisk's maps with LIDAR images of the same areas.
https://dancoecarto.com/mississippi-river-comparison
