2021 Map of Sumdum B-2 SW

About this map

Tongass National Forest dominates this landscape of Southeast Alaska, where glacial activity and high-altitude terrain define the environment. The map provides an intricate look at the flow of the Dawes Glacier as it moves through the eastern portion of the quadrangle. To the west, the ice fields of the North Baird Glacier and South Baird Glacier converge, illustrating the massive ice-covered sections of the Petersburg Borough. This high-resolution survey from the U.S. Geological Survey documents the elevation and contours of these shifting glacial features, which are vital for understanding the region's hydrologic and geologic changes over time.