5-m interval contours of smoothed multibeam bathymetry in western Massachusetts Bay map Quadrangle 2 (Q2_5MCTR.SHP)

The U.S. Geological Survey has conducted geologic mapping to characterize the sea floor offshore of Massachusetts. The mapping was carried out using a Simrad Subsea...美国地质调查局（U.S. Geological Survey）已开展地质填图工作，以表征马萨诸塞州（Massachusetts）近海的海底特征。本次填图采用Simrad Subsea……设备完成。