2015 Map of Columbia

This historical map portrays the area of Columbia in 2015, primarily covering Sonora as well as portions of Yankee Hill, Douglas Flat, and Vallecito. Featuring a scale of 1:24,000, this map provides a highly detailed snapshot of the terrain, roads, buildings, counties, and historical landmarks in the Columbia region at the time. Published in 2015, it is the sole known edition of this map.