Acoustic backscatter data collected in 2007 from the San Miguel Passage in the Channel Islands, California

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Guy R. Cochrane
Originator: David P. Finlayson
Originator: Evan T. Dailey
Publication_Date: 2018
Title:

Acoustic backscatter data collected in 2007 from the San Miguel Passage in the Channel Islands, California

Geospatial_Data_Presentation_Form: TIFF
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F78G8HVC

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/F78G8HVC
Online_Linkage:

https://www.sciencebase.gov/catalog/file/get/5b4f9061e4b06a6dd18444a0

Larger_Work_Citation:

Citation_Information:

Originator: Guy R. Cochrane
Originator: David P. Finlayson
Originator: Evan T. Dailey
Publication_Date: 2018
Title:

Bathymetry and acoustic backscatter data collected in 2007 from the San Miguel Passage in the Channel Islands, California

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F78G8HVC

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F78G8HVC

Description:

Abstract:

This portion of the data release presents acoustic backscatter data from the San Miguel Passage, in the Channel Islands, California. The data were collected in August 2007 by the U.S. Geological Survey, Pacific Coastal and Marine Science Center (USGS, PCMSC) using a 234.5 kHz SEA (AP) Ltd. SWATHplus-M phase-differencing sidescan sonar mounted on the NOAA, Channel Islands National Marine Sanctuary R/V Shearwater as part of the research cruise S-2-07-SC. Data were collected in water depths up to 89 meters. The San Miguel Passage is within the Channel Islands National Marine Sanctuary and is the body of water between the two western-most islands of the chain - Santa Rosa and San Miguel Islands. The data were processed at the USGS, PCMSC to create a 2-meter resolution TIFF raster, presented here.

Purpose:

These data were collected to characterize seafloor substrate types in the nearshore waters southwest of Santa Rosa Island in the Channel Islands National Marine Sanctuary.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=S207SC
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: 20070806
Ending_Date: 20070818

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -120.312
East_Bounding_Coordinate: -120.182
North_Bounding_Coordinate: 34.018
South_Bounding_Coordinate: 33.895

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5b4f9061e4b06a6dd18444a0

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sea-floor characteristics
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme_Keyword: interferometric sonar
Theme_Keyword: sea-floor acoustic reflectivity

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seabed
Theme_Keyword: multibeam echo sounder

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Channel Islands National Park
Place_Keyword: Channel Islands
Place_Keyword: Pacific Ocean

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 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: 831-460-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/5b4f9061e4b06a6dd18444a0?name=Backscatter_SanMiguelPassage.jpg&allowOpen=true

Browse_Graphic_File_Description: Image map of study area with backscatter intensity raster
Browse_Graphic_File_Type: JPG

Data_Set_Credit: Data collection was funded by U.S. Geological Survey
Native_Data_Set_Environment:

Microsoft Windows 7 Service Pack 1 with Esri ArcGIS version 10.5.0.6491

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No formal attribute accuracy tests were conducted. See spatial accuracy for vertical and horizontal accuracies.

Logical_Consistency_Report: All data fall within expected ranges.
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 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: Not applicable to backscatter imagery.

Lineage:

Process_Step:

Process_Description:

Data Collection: Bathymetry and acoustic-backscatter data were collected in 2007 using a 234.5 kHz SEA (AP) Ltd. SWATHplus-M phase-differencing sidescan sonar, mounted on the NOAA CINMS R/V Shearwater. Data were acquired and processed onboard using SEA Swath Processor (version 2.05) and SEA Grid Processor (version 2.05). Sound velocity profiles (SVPs) were collected with an Applied Micro Systems, SvPlus. The survey vessel was equipped with a dual antenna GPS compass and inertial attitude sensor: F180 Control Software (version 2.04), and the navigation application YONAV2 (version 1.19). GPS navigation data were post-processed with GrafNav (version 7.8) from Waypoint Navigation (NovAtel). Navigation data were processed in both forward and reverse.

Process_Date: 20070831

Process_Step:

Process_Description:

Data Gridding: The survey line files were imported into Caris HIPS and SIPS software (version 7.1.2). Bathymetry data were processed, filtered, and gridded into a 2-meter resolution base surface using the swath angle method. Backscatter data were processed using Caris mosaic module using the SIPS, sidescan engine. The base surface and backscatter mosaic were exported as a TIFF files in UTM-10 coordinates referenced to the NAD83 ellipsoid. The TIFF files were imported into a Geographic Information System (Esri, ArcMap) and converted to a grid. The grid was converted to an 8-bit raster in ArcMap and exported as a TIFF file with a TFW file defining the data’s geographic location and coordinate system.

Process_Date: 20070831

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
Row_Count: 6239
Column_Count: 5654

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: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 2.0
Ordinate_Resolution: 2.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: D_North_American_1983
Ellipsoid_Name: GRS 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: MLLW
Altitude_Resolution: 0.1
Altitude_Distance_Units: Meters
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Attribute table
Entity_Type_Definition:

Table containing attribute information associated with the dataset

Entity_Type_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: Value
Attribute_Definition: Backscatter intensity
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 255
Attribute_Units_of_Measure: Backscatter intensity value

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: sciencebase@usgs.gov

Resource_Description:

These data are available in TIFF format (Backscatter_SanMiguelPassage_NAD83-UTM10N.tif) contained in a single zip file which also includes a TIFF world file (.tfw), CSDGM FGDC-compliant metadata, and a browse image map of the data (.jpg).

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: TIFF
Format_Version_Number: Esri ArcGIS 10.5.0.6491
Format_Information_Content:

The .zip file contains the TIFF raster (.tif) and the TIFF world file (.tfw), a browse image map, and the metadata.

File_Decompression_Technique: No compression applied.
Transfer_Size: 16.57

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/5b4f9061e4b06a6dd18444a0

Network_Resource_Name: https://doi.org/10.5066/F78G8HVC

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 data and metadata. The second link points to a landing page with metadata and data

Fees: None.

Technical_Prerequisites: These data can be viewed with Esri ArcGIS software.

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: 831-460-4747
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_F78G8HVC/Backscatter_SanMiguelPassage_NAD83UTM10N_meta.html>