The Chesapeake Bay Approaches to Baltimore Harbor Waterproof NOAA Chart 12278 published by TrakMaps is a detailed geological map of the region. This wall map, measuring 36 inches in length and 44 inches in width, provides a clear representation of the geography and geology of the area. With a scale of 1:40000, this chart accurately depicts the topography of the region, making it a valuable resource for educators, students, and anyone interested in the geosciences.