The international border between Canada / United States of America defines the central axis of this landscape. Situated along the northern edge of Washington in Okanogan Co, the area is characterized by a network of drainage systems and high-country terrain. Unlike many topographic sheets, this particular edition focuses on the hydrography and boundary lines rather than detailed elevation contours, offering a clear view of the primary watercourses as they flow across the border. The map provides a precise layout of the boundary as it existed in the early 21st century, showing the spatial relationship between the northernmost reaches of the United States and the adjacent British Columbia territory.
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This is the sole edition of this map. No revisions or reprints were ever made.
1902 · Osoyoos
USGS Topo · 1:125,000
1904 · Osoyoos
USGS Topo · 1:125,000
1954 · Okanogan
USGS Topo · 1:250,000
1957 · Mt. Bonaparte
USGS Topo · 1:62,500
1957 · Oroville
USGS Topo · 1:62,500
1958 · Okanogan
USGS Topo · 1:250,000
1975 · Oroville NW
USGS Topo · 1:24,000
1981 · Mount Hull
USGS Topo · 1:24,000
1982 · Oroville
USGS Topo · 1:24,000
1984 · Oroville
USGS Topo · 1:100,000