Base source: USGS 1:24,000-scale topographic maps compiled 1948-1957; interpretations derived from soil map constructed 1973.; "Projection and 10,000-meter grid ticks, zone 18: Universal Transverse Mercator. 25,000-foot grid ticks based on Maryland coordinate system."; "1-15,763."; Aug. 1979.; Includes location map.
81 x 76 centimeters
1:63,360