Quonochontaug quadrangle, Rhode Island-Washington County [cartographic material] : 7.5 minute series (topographic) / topography by W. D. Leech and G. R. Sawyer.
Relief shown by contours, spot heights and bathymetric soundings. "Revisions shown in purple compiled from aerial photographs taken 1970. This information not field checked. Map photoinspected 1975." "Polyconic projection. 1927 North American datum 10,000-foot grid based on Rhode Island rectangular coordinate system. 1,000-meter Universal Transverse Mercator grid ticks, zone 19, shown in blue." Includes quadrangle location map. "N4115-W7137.5/7.5." "AMS 6666 I SW--Series V815."
- The U.S. Geological Survey
- Held by
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