
Big River carves through a landscape defined by extensive glacial activity and high-elevation ice fields in the late 1950s. This survey, conducted using photogrammetric methods from 1954 and 1957 aerial photography, reveals a terrain of sharp ridgelines and massive glaciers. The presence of numerous Crevasses across the ice sheets highlights the dynamic and shifting nature of the glaciers during this era. While the land lines represented here were predetermined by the Bureau of Land Management, they remained unsurveyed and unmarked on the ground at the time of publication, reflecting the true wilderness character of the region. The map captures a moment before significant modern changes, where the natural water systems and glacial movements were the primary features of the topography.
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2 editions found
1949 · McGrath
USGS Topo · 1:250,000
1950 · McGrath
USGS Topo · 1:250,000
1951 · Lime Hills
USGS Topo · 1:250,000
1958 · McGrath A-2
USGS Topo · 1:63,360
1958 · McGrath A-3
USGS Topo · 1:63,360
1958 · Lime Hills C-3
USGS Topo · 1:63,360
1958 · Lime Hills C-2
USGS Topo · 1:63,360
1958 · Lime Hills C-4
USGS Topo · 1:63,360
1958 · Lime Hills D-2
USGS Topo · 1:63,360
1958 · Lime Hills D-4
USGS Topo · 1:63,360