Webster quadrangle, Massachusetts--Connecticut [cartographic material] : 7.5 minute series (topographic) / mapped, edited, and published by the Geological Survey ; State of Massachusetts, Department of Public Works.
Relief shown by contours and spot heights. "Topography by plane-table surveys 1942-43. Revised from aerial photographs taken 1966. Field checked 1969." "Revisions shown in purple compiled in cooperation with the State of Massachusetts agencies from aerial photographs taken 1975 and other source data. This information not field checked. Map edited 1979." "Contour interval 10 feet." "Control by USGS, USC&GS, Massachusetts Geodetic Survey." Includes quadrangle location map. "N4200-W7152.5/7.5." "AMS 6668 III SW--Series V814."
- The U.S. Geological Survey
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