U.S. Geological Survey
2006
4-m Image of the Northern Half of the Pseudo-colored Backscatter Intensity of the Sea Floor off Northeastern Cape Cod (CAPENORTHPSEUDO_GEO4M_WGS84.TIF, Geographic, WGS84)
1.0
remote-sensing image
Open-File Report
2005-1048
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey
https://doi.org/10.3133/ofr20051048
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84.zip
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84.tif
http://pubs.usgs.gov/of/2005/1048/htmldocs/data_catalog.htm
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/
L.J. Poppe
V.F. Paskevich
B. Butman
S.D. Ackerman
W.W. Danforth
D.S. Foster
D.S. Blackwood
2006
Geological Interpretation of Bathymetric and Backscatter Imagery of the Sea Floor off Eastern Cape Cod, Massachusetts
1.0
Open-File Report
2005-1048
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2005/1048/
This data set includes pseudo-colored backscatter intensity of the sea floor offshore of northeastern Cape Cod, Massachusetts. The data were collected with a multibeam sea floor mapping system during USGS survey 98015, conducted November 9 - 25, 1998. The surveys were conducted using a Simrad EM 1000 multibeam echo sounder mounted aboard the Canadian Coast Guard vessel Frederick G. Creed. This multibeam system utilizes 60 electronically aimed receive beams spaced at intervals of 2.5 degrees that insonify a strip of sea floor up to 7.5 times the water depth (swath width of 100 to 200 m within the survey area). The horizontal resolution of the beam on the sea floor is approximately 10% of the water depth. Vertical resolution is approximately 1 percent of the water depth.
With pseudo-colored backscatter intensity, the backscatter intensity is combined with the topography to display the distribution of intensity in relation to the topography. In the image shown here, the backscatter intensity is represented by a suite of eight colors ranging from blue, which represents low intensity, to red, which represents high intensity. These data are draped over a shaded relief image created by vertically exaggerating the topography four times and then artificially illuminating the relief by a light source positioned 45 degrees above the horizon from an azimuth of 0 degrees. The resulting image displays light and dark intensities within each color band that result from a feature's position with respect to the light source. For example, north-facing slopes, receiving strong illumination, show as a light intensity within a color band, whereas south-facing slopes, being in shadow, show as a dark intensity within a color band.
To release a digital map (GeoTIFF image) derived from multibeam observations that shows sea floor pseudo-colored backscatter intensity (a measure of sea floor texture and roughness) at a spatial resolution of 4 m/pixel.
19981109
19981125
ground condition
None planned
-70.307833
-69.828333
42.116667
41.966667
USGS Metadata Identifier
USGS:a499897a-ee88-4c39-8b9c-8b81b716e623
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Science Center
WHSC
Simrad EM1000
Frederick G. Creed
Sea Floor Mapping
Multibeam Echo Sounder
Multibeam
Backscatter Intensity
Pseudo-colored Backscatter Intensity
Sea Floor Geology
Surficial Geology
Field Activity Number 98015
GeoTIFF Image
ISO 19115 Topic Category
oceans
imageryBaseMapsEarthCover
geoscientificInformation
USGS Thesaurus
sea-floor acoustic reflectivity
image mosaics
multibeam sonar
marine geophysics
geospatial datasets
None
Cape Cod
Massachusetts
MA
Cape Cod National Seashore Park
U.S. East Coast
United States
North America
Atlantic Ocean
None
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Lawrence J. Poppe
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
lpoppe@usgs.gov
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84-thumb.gif
Thumbnail image showing data set extent and coverage.
GIF
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84.gif
Image map showing data layer extent and coverage.
GIF
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
L.J. Poppe
D.S. Foster
W.W. Danforth
2006
Character and distribution of exposed glaciodeltaic deposits off outer Cape Cod, Massachusetts, and their effects on hydrogeology and benthic habitats
1.0
Geo-Marine Letters
v. 26
Germany
Springer
Information unavailable from original metadata.
All collected data were processed and used to produce this dataset.
Navigation was by differential GPS.
USGS
unpublished material
Raw multibeam data
This file had a source contribution, but no source citation information. This information was populated based on information in the source contribution.
DVD-ROM
19981109
19981125
ground condition
98015_multibeam_data
The original multibeam bathymetric data acquired with a Simrad EM 1000 echosounder during USGS cruise 98015 aboard the Canadian Coast Guard vessel Frederick G. Creed.
(1) Data and acquisition processing at sea:
After the echo sounder data were logged onto the hard disk of the Sun workstation, a suite of processing software developed by the Ocean Mapping Group (www.omg.unb.ca/~jhc/SwathEd.html) was used to correct for artifacts and errors that may have been introduced during data collection. This software also enhanced the corrected data by resolving beam pattern and aspect ratio distortions and by imposing a linear contrast stretch before it generated bathymetric and sidescan sonar image mosaics in a Mercator projection. All data processing described here is initiated using Silicon Graphics workstations as soon as each acquisition file is closed by the Simrad Mermaid workstation (usually at the end of each survey line). Additional processing was done in the lab to correct for fluctuations in sea level during the survey and for artifacts in the data files that were not corrected in the field (see below).
(2) The processing and editing steps on board the ship were:
(A.) Demultiplex, or unravel, the acquired Simrad data files using RT to generate separate files containing navigation, depth soundings, sidescan sonar backscatter values, and sound velocity information.
(B.) Automatically reject bad data (autoRejectSoundings). For the multibeam soundings, reject data outside expected depth ranges (operator's decision based on nautical chart data); for navigation data, reject fixes with poor GPS statistics.
(C.) Edit the navigation data on-screen using jview to remove undesirable points, including turns at the ends of survey lines.
(D.) Edit the multibeam soundings on-screen using swathed to remove individual anomalous soundings.
(E). Merge tidal information and the corrected navigation back (mergetide and mergenav) into the data files. Tidal information was obtained from predicted tides using the Xtide program http://www.flaterco.com/xtide/xtide.html), which generated predicted tides based on the harmonic coefficients for Chatham provided by the Xtide program.
(F.) Map the bathymetric soundings from each processed data file onto a Mercator grid using weigh_grid (a SwathEd utility) with node spacings and scale selected by the operator. The grid file (capenorth.r4) was a floating point binary file.
98015_multibeam_data
Unknown
capenorth.r4
William Danforth
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2274
(508) 457-2310
bdanforth@usgs.gov
A pseudo-colored (false colored) image was generated using the SwathEd utility mix_ci by combining the bathymetric and backscatter raster mosaics into a single image in Mercator projection.
capenorth.r4
Unknown
capenorthpseudo_mer4m.tif
Bill Danforth
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2274
(508) 457-2310
bdanforth@usgs.gov
The imagery was converted from Mercator projection to geographic.
capenorthpseudo_mer4m.tif
2005
capenorthpseudo_geo4m_wgs84.tif
Valerie Paskevich
U.S. Geological Survey
Information Specialist / GIS Coordinator
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2281
(508) 457-2310
vpaskevich@usgs.gov
Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Most issues were with blank elements that could actually be removed. This file had a source contribution, but no source citation information. This information was populated based on information in the source contribution. Also, both geographic and planar coordinate systems, a common problem when using ArcCatalog. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20151109
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
USGS Thesaurus keywords added to the keyword section.
20180720
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Crossref DOI link was added as the first link in the metadata.
20191118
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
Pixel
4191
9986
1
0.000036
0.000048
Decimal degrees
World Geodetic System 84
World Geodetic System 84
6378137
298.257
There are no attributes associated with the GEOTIFF image.
U.S. Geological Survey
Lawrence J. Poppe
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
lpoppe@usgs.gov
Downloadable Data.
Although all data have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. government.
TIFF
Information unavailable from original metadata.
GeoTIFF
GeoTIFF format pseudo-colored backscatter mosaic, GeoTIFF world file and associated metadata. The zip file containing the image and the associated metadata is 3.8 MB.
zip archive
3.4
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84.zip
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/capenorthpseudo_geo4m_wgs84.tif
http://pubs.usgs.gov/of/2005/1048/htmldocs/data_catalog.htm
http://pubs.usgs.gov/of/2005/1048/data/backscatter/pseudocolor/geo/
Data are downloadable via the World Wide Web (WWW).
DVD-ROM
4.75
Gbytes
UDF
None
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.
2006
20211116
Larry Poppe
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None