EX1103L2_Bathymetric
NOAA Office of Ocean Exploration and Research
Elizabeth Lobecker
2011
Processed and gridded data in ArcView Grid format collected between 20110707 and 20110728
tabular digital data
NOAA Office of Ocean Exploration and Research
Elizabeth Lobecker, OER (ERT Inc)
Unpublished material
EX1103 Leg 2 Exploration and Mapping Galapagos Spreading Center on Okeanos Explorer in North Pacific Ocean between 20110707 and 20110728
This data set is part of a larger set of data called the MultiBeam Bathymetric Data Base (MBBDB) where other similar data can be found at http://map.ngdc.noaa.gov/website/mgg/multibeam/
The intent of these data is to make high-resolution bathymetry available to the public for a wide variety of uses such as research and earth science analysis. These data are not intended to be used for navigation. Nautical charts produced and certified by NOAA should be used for navigational purposes. For more information on NOAAs nautical charts, go to NOAAs Office of Coast Survey website at: http://chartmaker.ncd.noaa.gov.
See the following for details of the database at the time of publication. W. Virden, T. Habermann, G. Glover, D. Divins, G. Sharman, and C. Fox, 2004, Multibeam Bathymetric Data at NOAA/NGDC in Bridges Across the Ocean, OCEANS04 MTS/IEEE, TECHNO-OCEANS04 November 9-12, 2004 (Conference), 4 p.
20110707
20110728
ground condition
None Planned
-122.5
-79.4
33.0
0.6
GCMD
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
ISO 19115 Topic Categories
Oceans
014
None
Ocean Exploration
Limits of the Oceans and Seas
North Pacific Ocean
Galapagos Islands
EX1103 Leg 2 Exploration and Mapping Galapagos Spreading Center
NOAA Ship Okeanos Explorer
Kongsberg-Simrad EM302
Unknown
None
Bathymetric
No access constraints.
Data shall not be used for navigation.
OER (ERT Inc)
Elizabeth Lobecker
physical or mailing
24 Colovos Road
Durham
NH
03824
US
603-862-1475
603-862-0241
elizabeth.lobecker@noaa.gov
These files were tested by opening in ArcMap 9.3 to ensure that geospatial content of the file is not corrupted and is consistent with the Level 0 data.
The full-resolution multibeam data (Level 0 data) were used to create a BASE surface in CARIS HIPS 6.1, which was then exported to ASCII XYZ text file. That ASCII XYZ file was used to generate a shaded relief DTM (SD file) in IVS Fledermaus which was then used to create Geotiff files, ArcView Grids, and Google Earth KMZ files. The data are believed to be complete in accordance with the ship's multibeam data acquisition and processing logs.
The bathymetry data were generated using a Kongsberg EM302 multibeam system, and recorded using Kongsberg's Seafloor Information System (SIS) software as *.all files. Collocated to the bathymetric data, bottom backscatter data were collected stored within *.all files, both as beam averaged backscatter values, and as full time series values within each beam. Realtime corrections to the data include: Continuous application of surface sound speed obtained with a hull-mounted SBE 45 thermosalinograph, Application of sound speed profiles obtained with Sippican Deep Blue Expendable Bathythermographs (XBTs) and / or Seabird CTD 9/11, Application of roll, pitch, and heave motion corrections obtained with POS M/V V.4 motion sensor unit.
Each raw multibeam file was imported into CARIS HIPS and SIPS 6.1. Each file was individually cleaned of errant navigation and depth values using CARIS's Swath Editor. The files were then added to a cumulative Base Surface within CARIS, and further cleaned of errant depth values using CARIS's Subset Editor. Motion corrector values from POS M/V V. 4 applied in real-time were verified in CARIS's Attitude and Navigation editors. No tidal corrections were applied.
The ASCII XYZ file was then imported into IVS 3D Fledermaus v.7 to build an *.sd file. The *.sd file retains the resolution of the source gridded ASCII XYZ data. The *.sd file format was selected for its ability to be viewed using the iView4D freeware distributed by IVS3D (www.ivs3d.com).
An ArcView Grid was then exported from Fledermaus v.7 product.
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2011
OER (ERT Inc)
Elizabeth Lobecker
mailing and physical
24 Colovos Road
Durham
NH
03824
US
603-862-1475
elizabeth.lobecker@noaa.gov
National Geophysical Data Center
NGDC Data Officer
mailing and physical
325 Broadway, NOAA E/GC
Boulder
CO
80305-3328
US
303-497-6826
303-497-6513
ngdc.info@noaa.gov
8:00 am to 5:00 pm Mountain
While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
20111108
National Geophysical Data Center
NGDC Data Officer
mailing and physical
325 Broadway, NOAA E/GC
Boulder
CO
80305-3328
US
303-497-6826
303-497-6513
ngdc.info@noaa.gov
8:00 am to 5:00 pm Mountain
Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata
FGDC-STD-012-2002
none
Unclassified
none