Plymouth serves as the focal point of this 2019 survey, situated where the Yellow River winds through the northern Indiana landscape. The area is defined by a dense network of drainage infrastructure, including the Breeding Ditch, Hartman Ditch, and Leffert Ditch, illustrating the long-standing agricultural management of the Marshall County terrain. To the southwest, a cluster of glacial lakes provides a distinct contrast to the grid of rural roads, with Pretty Lake, Dixon Lake, and Holem Lake forming a significant recreational and residential sub-district near Twin Lakes.
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This is the sole edition of this map. No revisions or reprints were ever made.
1953 · Chicago
USGS Topo · 1:250,000
1957 · Chicago
USGS Topo · 1:250,000
1957 · Inwood
USGS Topo · 1:24,000
1957 · Plymouth
USGS Topo · 1:24,000
1958 · Donaldson
USGS Topo · 1:24,000
1958 · Bremen
USGS Topo · 1:24,000
1958 · La Paz
USGS Topo · 1:24,000
1958 · Walkerton
USGS Topo · 1:24,000
1962 · Argos
USGS Topo · 1:24,000
1962 · Culver
USGS Topo · 1:24,000