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GeoTIFF image of shaded-relief bathymetry, illuminated from 45 degrees, of the sea floor of the Hudson Canyon region (100-m resolution, Mercator, WGS 84)

Dates

Publication Date
Start Date
2002-08-27
End Date
2002-09-15

Citation

Butman, Bradford, Danforth, W.W., Twichell, D.C., and Rona, P.A., 2017, Bathymetry, backscatter intensity, and geomorphology of the sea floor of the Hudson Canyon and adjacent slope and rise: U.S. Geological Survey data release, https://doi.org/10.5066/F77H1GSF.

Summary

The Hudson Canyon begins on the outer continental shelf off the east coast of the United States at about 100-meters (m) water depth and extends offshore southeastward across the continental slope and rise. A multibeam survey was carried out in 2002 to map the bathymetry and backscatter intensity of the sea floor of the Hudson Canyon and adjacent slope and rise. The survey covered an area approximately 205 kilometers (km) in the offshore direction, extending from about 500 m to about 4,000 m water depth, and about 110 km in the alongshore direction, centered on the Hudson Canyon. The sea floor was mapped using a SeaBeam Instruments 2112 multibeam echosounder aboard the National Oceanic and Atmospheric Administration (NOAA) ship Ronald [...]

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Attached Files

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hc_rb_srelief45_browsegraphic.jpg
“Browse graphic of the data.”
thumbnail 42.62 KB image/jpeg
hc_rb_srelief45.zip
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2.1 MB application/zip

Purpose

The GeoTIFF image of shaded-relief bathymetry provides a visualization of the bathymetry that accentuates small features that cannot be effectively shown as contours alone. The shaded-relief image was created by vertically exaggerating the bathymetry 10 times and then artificially illuminating the relief from the northeast (45 degrees, approximately parallel to the survey tracklines) by a light source positioned 30 degrees above the horizon. The illumination from the northeast, approximately parallel to the survey lines, minimizes artifacts caused by small depth changes that may occur between survey lines and accentuates subtle downslope features.

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