Central Islip/: prepared under the direction of the Chief of Engineers by the Army Map Service (AM) 1947

Shows portions of Islip, Smithtown and Brookhaven Townships. “Marginal data revised and Universal Transverse Mercator Grid added, 1947. Copied in 1947 from New York, 1:25,000, AMS, Central Islip, 1944.” Relief shown by contours and spot heights. “Reprinted from miltary edition for civil use. Sold and distributed by U.S. Geologiocal Survey, Washington 25, D.C.” Includes index maps, metric conversion scales and declination diagram. “Sheet 6365 1 SW.”