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Boston
52
CMGP
52
Coastal and Marine Geology Program
52
EM 1000
52
Frederick G. Creed
52
Gulf of Maine
52
Massachusetts
52
Massachusetts Bay
52
North Atlantic Ocean
52
Simrad
52
Stellwagen Basin
52
U.S. Geological Survey
52
USGS
52
United States
52
WHSC
52
Woods Hole Science Center
52
multibeam
52
oceans
imageryBaseMapsEarthCover
50
sea floor
50
sea floor mapping
50
MWRA
48
MWRA ocean outfall
48
GeoTIFF
40
image
40
elevation
35
Gloucester
32
bathymetry
31
Jeffreys Ledge
26
MBDS
26
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