Sycamore and DeKalb form the dual anchors of this mid-2010s landscape, illustrating the proximity of these major northern Illinois communities. The area is defined by the winding course of the South Branch Kishwaukee River and its East Branch, which cut through the agricultural surroundings and residential expansion. Several aviation sites, including the De Kalb Taylor Municipal Airport and the smaller Ruder Airport, highlight the region's role as a regional transport and logistics hub.
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This is the sole edition of this map. No revisions or reprints were ever made.
1918 · Kirkland
USGS Topo · 1:62,500
1934 · De Kalb
USGS Topo · 1:62,500
1937 · De Kalb
USGS Topo · 1:62,500
1937 · Sycamore
USGS Topo · 1:62,500
1938 · Genoa
USGS Topo · 1:62,500
1954 · Rockford
USGS Topo · 1:250,000
1955 · Rockford
USGS Topo · 1:250,000
1958 · Aurora
USGS Topo · 1:250,000
1958 · Rockford
USGS Topo · 1:250,000
1961 · Aurora
USGS Topo · 1:250,000