High-resolution multibeam backscatter data collected in 2004 for the northern Channel Islands region, southern California

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Guy R. Cochrane
Publication_Date: 20160712
Title:
High-resolution multibeam backscatter data collected in 2004 for the northern Channel Islands region, southern California
Edition: 1.0
Geospatial_Data_Presentation_Form: ASCIIRaster
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7S46Q1J
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/F7S46Q1J
Online_Linkage:
https://www.sciencebase.gov/catalog/item/5ee65fe582ce3bd58d82eb7e
Larger_Work_Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Guy R. Cochrane
Publication_Date: 2016
Title:
High-resolution multibeam bathymetry and backscatter data - northern Channel Islands region, southern California
Geospatial_Data_Presentation_Form: ASCIIRaster
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7S46Q1J
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/F7S46Q1J
Description:
Abstract:
This data release presents data for 5-m resolution acoustic-backscatter data of the northern Channel Islands region, southern California. In 2004 the U.S. Geological Survey, Pacific Coastal and Marine Science Center collected multibeam-bathymetry and acoustic-backscatter data in the northern Channel Islands region, southern California. The region was mapped aboard the R/V Ewing using a Kongsberg Simrad EM-1002 multibeam echosounder. These data were previously published on-line at http://pubs.usgs.gov/of/2005/1153/. In this data release the data have been reprocessed to a finer spatial resolution (5-m versus 15-m) using more modern processing techniques. Due to the large file sizes the entire survey area is provided as two ASCIIRaster files (one for the north portion of the study area and another for the south). A few survey line files in the northern region did not process and are missing from the ASCIIRaster file.
Purpose:
These data are intended for policy makers, resource managers, science researchers, students, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation.
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=E104SC
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040806
Ending_Date: 20040815
Currentness_Reference: ground condition at the time the data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -119.70
East_Bounding_Coordinate: -119.04
North_Bounding_Coordinate: 34.33
South_Bounding_Coordinate: 33.86
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5ee65fe582ce3bd58d82eb7e
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover
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: multibeam echo sounder
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of California
Place_Keyword: Channel Islands
Place_Keyword: Santa Barbara Channel
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 navigation 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
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Cross_Reference:
Citation_Information:
Originator: Peter Dartnell
Originator: Guy Cochrane
Originator: Mary Elaine Dunaway
Publication_Date: 2005
Title:
Multibeam bathymetry and backscatter data: northeastern Channel Islands region, southern California
Geospatial_Data_Presentation_Form: ASCII XYZ
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey Open-File Report
Online_Linkage: https://pubs.usgs.gov/of/2005/1153/
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Not applicable for raster data.
Logical_Consistency_Report: No formal logical accuracy tests were conducted.
Completeness_Report:
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Estimated to be no less than 5 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: Not applicable for acoustic backscatter data
Lineage:
Process_Step:
Process_Description:
The multibeam acoustic-backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM1002 multibeam-sonar system. The data were cleaned of bad navigation and depth readings and corrected for tides to mean lower low water datum using a predictive tide model. The depth readings then were gridded into a common grid. The gridded data were converted to ArcInfo GRID format using ArcInfo's ASCIIGRID command.
Process_Date: 20041130
Process_Step:
Process_Description:
The USGS retrieved the raw survey line files from the USGS archives. The line files were processed in Caris HIPS and SIPS software (version 9). The data are cleaned of bad navigation and depth readings and corrected for tides to mean lower low water datum using a predictive tide model. Backscatter processing used Caris's Geocoder engine using the Time Series data type. Automatic Time Varying Gain (value = 1), Gain (value = 2), and Angle Varying Gain (window size = 30) were applied The data were gridded into images with 5-m spatial resolution which then were exported as ASCIIRaster files.
Process_Date: 2016
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 standardizing doi# links, correcting typos, adding disclaimers, and refining keywords. Point of Contact and Metadata Contact information sections were changed to static PCMSC contact information. No data were changed. 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: 20200612
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
Process_Step:
Process_Description:
Performed minor edits to the metadata to correct typos. No data were changed
Process_Date: 20211013
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Susan A. Cochran
Contact_Position: Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@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: 11
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: 5.0
Ordinate_Resolution: 5.0
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: WGS84
Ellipsoid_Name: WGS84
Semi-major_Axis: 6378137.00
Denominator_of_Flattening_Ratio: 298.257223563
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Due to the large file sizes the entire survey area is provided as two ASCIIRaster files (USGS_NChannelIslands_NorthArea_Backscatter_5m.zip and USGS_NChannelIslands_SouthArea_Backscatter_5m.zip).
The complete 5-m-resolution backscatter grid for the northern region was originally archived as an ESRI grid with the following attributes. A few survey line files in the northern region did not process and are missing from the ASCIIRaster file. 
Cell size = 5.0
Number of rows = 5270
Number of columns = 8136

Data type = floating point

Boundary
Xmin = 251142
Xmax = 291822
Ymin = 3774302
Ymax = 3800652

Statistics
Minimum value = -66.38
Maximum value = 0.35
Mean = -25.18
Standard deviation = 2.54

Coordinate system description
Projection  UTM
Zone  11
Datum  WGS84
Vertical Datum  MLLW
Units  meter
The complete 5-m-resolution backscatter grid for the southern region was originally archived as an ESRI grid with the following attributes. 
Cell size = 5.0
Number of rows = 4397
Number of columns = 9655

Data type = floating point

Boundary
Xmin = 262817
Xmax = 311092
Ymin = 3752652
Ymax = 3752652

Statistics
Minimum value = -70.61
Maximum value = 36.69
Mean = -22.69
Standard deviation = 5.55

Coordinate system description
Projection  UTM
Zone  11
Datum  WGS84
Vertical Datum  MLLW
Units  meter
Entity_and_Attribute_Detail_Citation: none
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
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
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencbase@usgs.gov
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: Raster data format
Format_Version_Number: ArcMap (version 10.0, Esri, 2011)
Format_Specification:
Raster data layer is registered ASCIIRaster in the UTM Zone 11 coordinate system with datum WGS84.
Format_Information_Content:
The .zip file (USGS_NChannelIslands_NorthArea_Backscatter_5m.zip) includes the ASCIIRaster data (.asc, .prj), as well as FGDC-compliant metadata (.xml) for the north part of the study area
File_Decompression_Technique: WinZip
Transfer_Size: 42
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/5ee65fe582ce3bd58d82eb7e?name=USGS_NChannelIslands_NorthArea_Backscatter_5m.zip
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/5ee65fe582ce3bd58d82eb7e
Network_Resource_Name: https://doi.org/10.5066/F7S46Q1J
Access_Instructions:
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of backscatter data for the north portion of the study area. The second link points to a landing page for all of the backscatter data (north and south) and the metadata. The third link points to a landing page for the entire data release.
Digital_Form:
Digital_Transfer_Information:
Format_Name: Raster data format
Format_Version_Number: ArcMap (version 10.0, Esri, 2011)
Format_Specification:
Raster data layer is registered ASCIIRaster in the UTM Zone 11 coordinate system with datum WGS84.
Format_Information_Content:
The .zip file (USGS_NChannelIslands_SouthArea_Backscatter_5m.zip) includes the ASCIIRaster data (.asc, .prj), as well as FGDC-compliant metadata (.xml) for the south part of the study area
File_Decompression_Technique: WinZip
Transfer_Size: 50
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/5ee65fe582ce3bd58d82eb7e?name=USGS_NChannelIslands_SouthArea_Backscatter_5m.zip
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/5ee65fe582ce3bd58d82eb7e
Network_Resource_Name: https://doi.org/10.5066/F7S46Q1J
Access_Instructions:
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of backscatter data for the south portion of the study area. The second link points to a landing page for all of the backscatter data (north and south) and the metadata. The third 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 ASCIIRaster.
Metadata_Reference_Information:
Metadata_Date: 20211013
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
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
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7S46Q1J/USGS_NChannelIslands_Backscatter_5m.html>
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