2017 Map of Abercrombie Mountain OE N

About this map

The international border between the United States of America and Canada serves as the primary focal point for this survey. Published by the U.S. Geological Survey in 2017, the map delineates a remote stretch of the 49th parallel where the Washington-British Columbia boundary crosses a complex network of unnamed northern drainages. While many historical topographic maps are dense with named summits and settlements, this particular sheet focuses on the precision of the international line itself, as established by multiple agencies including the Bureau of Land Management and the U.S. Census Bureau. This document is a critical reference for understanding how modern cartographic standards like the North American Datum of 1983 are applied to the stark geographic reality of the borderlands north of Abercrombie Mountain.