Madisonburg and Hublersburg anchor this segment of Central Pennsylvania, where the landscape is defined by the sharp corridors of Brush Valley and Little Sugar Valley. The terrain is characterized by a series of prominent gaps and ridges, including Markle Gap and Big Kettle Mountain, which dictate the local road network and settlement patterns. A distinctive geological feature, Penns Cave Spring, feeds into Penns Cr at the edge of Brush Valley, illustrating the region's complex karst topography.
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This is the sole edition of this map. No revisions or reprints were ever made.
1921 · Howard
USGS Topo · 1:48,000
1921 · Lock Haven
USGS Topo · 1:62,500
1923 · Howard
USGS Topo · 1:62,500
1923 · Lock Haven
USGS Topo · 1:62,500
1924 · Centre Hall
USGS Topo · 1:62,500
1929 · Centre Hall
USGS Topo · 1:62,500
1937 · Millheim
USGS Topo · 1:48,000
1941 · Millheim
USGS Topo · 1:62,500
1943 · Lewistown
USGS Topo · 1:125,000
1944 · Lock Haven
USGS Topo · 1:62,500