Acoustic backscatter from 2013 interferometric swath bathymetry systems survey of Columbia River Mouth, Oregon and Washington

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Guy Gelfenbaum
Originator: David Finlayson
Originator: Peter Dartnell
Publication_Date: 2015
Title:
Acoustic backscatter from 2013 interferometric swath bathymetry systems survey of Columbia River Mouth, Oregon and Washington
Edition: 1.0
Geospatial_Data_Presentation_Form: GeoTIFF
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7T72FHB
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7T72FHB
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Guy Gelfenbaum
Originator: David Finlayson
Originator: Peter Dartnell
Publication_Date: 2015
Title:
Bathymetry and backscatter from 2013 interferometric swath bathymetry systems survey of Columbia River Mouth, Oregon and Washington
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7T72FHB
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7T72FHB
Description:
Abstract:
This part of the USGS data release presents acoustic backscatter data for the Columbia River Mouth, Oregon and Washington. The acoustic backscatter data of the Columbia River Mouth, Oregon and Washington were collected by the U.S. Geological Survey (USGS). Mapping was completed in 2013, using a 234-kHz SEA SWATHPlus interferometric system. These data are not intended for navigational purposes.
Purpose:
These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features.
Supplemental_Information:
Additional information about the field activity from which these data were derived is available online at: http://cmgds.marine.usgs.gov/fan_info.php?fan=S0313WO
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20130506
Ending_Date: 20130618
Currentness_Reference: ground condition at time data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.11
East_Bounding_Coordinate: -123.92
North_Bounding_Coordinate: 46.29
South_Bounding_Coordinate: 46.20
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5f00c7e782ce0afb2445d6ec
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: multibeam sonar
Theme_Keyword: Bathymetry
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: marine geology
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: marine geology
Theme_Keyword: marine geophysics
Theme_Keyword: single-beam echo sounder
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of Oregon
Place_Keyword: State of Washington
Place_Keyword: Columbia River
Access_Constraints: none
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigational purposes.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: US
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Greyscale image map showing acoustic backscatter of the Columbia River mouth off Oregon and Washington. Lighter tones show stronger, high-intensity backscatter indicating harder and rougher bottom types such as rocky outcrops or coarse sediment; darker tones show weaker, low-intensity backscatter indicating softer bottom types such as fine sediment.
Browse_Graphic_File_Type: PNG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Not applicable for raster data.
Logical_Consistency_Report: Unspecified
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal_Positional_Accuracy_Report: Estimated to be no less than 2 m, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: Vertical_Positional_Accuracy_Report: Not applicable to imagery
Lineage:
Process_Step:
Process_Description:
The USGS R/V Parke Snavely was equipped with an Applanix Position and Orientation System for Marine Vessels (POS/MV) inertial motion unit (IMU) for the duration of the survey. The POS/MV received Differentially Corrected Global Positioning System (DGPS) aided positional navigation from dual Trimble model 4000 DGPS receivers, and commercial C-Nav satellite differential stations. The DGPS data were combined with the inertial vessel motion measurements (pitch, roll, and heading) directly within the POS/MV hardware so that high-precision position and attitude corrections were fed in real time to the sonar acquisition equipment. Sound velocity measurements were collected continuously with an Applied Micro Systems Micro sound velocimeter (SV) deployed on the transducer frame for real-time sound velocity adjustments at the transducer-water interface. Additionally, water column sound velocity profiles (SVP) were collected approximately every 2 hours throughout each survey day with an Applied Micro Systems, SvPlus 3472. DGPS data and measurements of vessel motion were combined in the POS/MV hardware to produce a high-precision vessel attitude packet. This packet was transmitted to the Swath Processor acquisition software in real time and combined with instantaneous sound velocity measurements at the transducer head before each ping. The returned samples were projected to the seafloor using a ray-tracing algorithm working with the previously measured sound-velocity profiles in SEA Swath Processor. A series of statistical filters were applied to the raw samples that isolated the seafloor returns from other spurious targets in the water column. Finally, the processed data were stored line-by-line in both raw (.sxr) and processed (.sxp) trackline files. The raw 16-bit backscatter data recorded simultaneously with bathymetry by the SWATHplus system was georeferenced and gain-normalized by the program SXPEGN written by the USGS to enhance the backscatter imagery. The program normalizes for time-varying signal loss and beam directivity differences. The resulting normalized amplitude values are re-scaled to 16 bit, and gridded into a GeoJPEG using GRID Processor Software supplied by SEA. The image was imported into ESRI GIS software and projected to North American Datum of 1983. The image was then converted to a GeoTIFF file using ESRI GIS software.
Process_Date: 2015
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter Dartnell
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States
Contact_Voice_Telephone: 831-460-7415
Contact_Electronic_Mail_Address: pdartness@usgs.gov
Process_Step:
Process_Description:
Extraneous text removed from Semi-Major Axis tag. Point of Contact and Metadata Contact were updated to PCMSC static contact information, and Data Processing Contact information was added. No data or data information were changed. This updated metadata file was also slipped inside the zip file containing the data.
Process_Date: 20191125
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan A Cochran
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States
Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov
Process_Step:
Process_Description:
Data and metadata files were moved to a different location on ScienceBase, resulting in a change of ID number in the Online_Linkage and Network_Resources URLs of the metadata. In addition, edits were made as needed to bring the metadata up to current PCMSC standards including adding disclaimers, and refining keywords. No data were changed, however the metadata file is now only found at the top level download and not tucked inside the data zip (to allow easier updates in the future). Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version.
Process_Date: 2020704
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan A Cochran
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States
Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov
Process_Step:
Process_Description:
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
Process_Date: 20201019
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.00000
Latitude_of_Projection_Origin: 0.00000
False_Easting: 500000.0
False_Northing: 0.00
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 1.0
Ordinate_Resolution: 1.0
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: NAD83
Ellipsoid_Name: GRS80
Semi-major_Axis: 6378137.00
Denominator_of_Flattening_Ratio: 298.257223563
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The USGS Columbia River Mouth backscatter data were originally archived as a GeoTIFF image with the following attributes:
Cell size = 1.0
Number of rows = 9386
Number of columns = 21067

Data type = floating point

Boundary
Xmin = 413360
Xmax = 434427
Ymin = 5115831
Ymax = 5125217

Statistics
Minimum value = -11.12
Maximum value = 65546.12
Mean = 32046.10
Standard deviation = 9795.75

Coordinate system description
Projection  UTM
Zone  10
Datum  NAD83 (GEOID12A)
Units  meter
Entity_and_Attribute_Detail_Citation: none
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: U.S. Geological Survey - Science Base
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
Data are available in a zip file (USGS_CR_backscatter_UTM10_NAD83.zip) containing a GeoTIFF raster (USGS_CR_backscatter_UTM10_NAD83.tif), along with the associated Tiff World File (USGS_CR_backscatter_UTM10_NAD83.tfw). The data zip is accompanied by FGDC-compliant metadata and a browse graphic.
Distribution_Liability:
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Version_Number: ArcMap (version 10.3.1, ESRI, 2015)
Format_Information_Content:
Raster data layer is registered TIFF image in the UTM Zone 10 coordinate system with datum NAD83.
File_Decompression_Technique: WinZip
Transfer_Size: 119
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
Data can be downloaded via the Internet using the Network Resource Links. The first link begins a direct download of the bathymetry data and accompanying files. The second link points to a landing page for the entire data release.
Fees: None
Technical_Prerequisites:
The downloadable data file has been compressed with the "zip" command and can be unzipped with WinZip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcMap TIFF.
Metadata_Reference_Information:
Metadata_Date: 20201019
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: US
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: universal time

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7T72FHB/USGS_CR_backscatter_UTM10_NAD83.html>
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