Base source: USGS 1:100,000 county base map dated 1976; interpretations derived from soil map constructed 1975.; "Projection and 10,000-metre grid ticks, zones 18 and 19: Universal Transverse Mercator. 25,000-foot grid ticks based on New York coordinate system, Long Island zone."; Oct. 1978.; Includes location map. on 3 sheets 102 x 122 centimeters and 122 x 102 centimeters Scale 1:50,000