
The Delaware River carves a deep valley between Pennsylvania and New Jersey on this 1930s survey, serving as a corridor for heavy industry and transportation. The landscape is defined by the ridge-and-valley system of the Appalachians, with Marble Mountain and Scotts Mountain rising above the riverbanks. Industrial heritage is evident at Durham Furnace and near the Lehigh River confluence, where a dense network of railroads including the Lehigh Valley Railroad and Pennsylvania Railroad navigate the narrow corridors.
157 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
5 editions found
1888 · Hackettstown
USGS Topo · 1:62,500
1888 · Quakertown
USGS Topo · 1:62,500
1890 · Easton
USGS Topo · 1:62,500
1890 · High Bridge
USGS Topo · 1:62,500
1890 · Lambertville
USGS Topo · 1:62,500
1890 · Doylestown
USGS Topo · 1:62,500
1890 · Quakertown
USGS Topo · 1:62,500
1891 · Easton
USGS Topo · 1:62,500
1891 · Lambertville
USGS Topo · 1:62,500
1891 · Doylestown
USGS Topo · 1:62,500