GNSS locations of seabed images collected at Looe Key, Florida, 2021

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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: Gerald A. Hatcher
Originator: Christine J. Kranenburg
Originator: Jonathan A. Warrick
Publication_Date: 20221005
Title:

GNSS locations of seabed images collected at Looe Key, Florida, 2021

Geospatial_Data_Presentation_Form: comma-delimited text file
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9WSF09G

Publication_Information:

Publication_Place: Santa Cruz, California
Publisher:

U.S. Geological Survey - Pacific Coastal and Marine Science Center

Online_Linkage: https://doi.org/10.5066/P9WSF09G
Larger_Work_Citation:

Citation_Information:

Originator: Gerald A. Hatcher
Originator: Christine J. Kranenburg
Originator: Jonathan A. Warrick
Originator: Stephen T. Bosse
Originator: David G. Zawada
Originator: Kimberly K. Yates
Originator: Selena A. Johnson
Publication_Date: 2022
Title:

Overlapping seabed images and location data acquired using the SQUID-5 system at Looe Key, Florida, in July 2021, with derived point cloud, digital elevation model and orthomosaic of submerged topography

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9WSF09G

Publication_Information:

Publication_Place: Santa Cruz, California
Publisher:

U.S. Geological Survey - Pacific Coastal and Marine Science Center

Online_Linkage: https://doi.org/10.5066/P9WSF09G

Description:

Abstract:

The text file "SQUID5_LKR_2021_Image_Locations.txt" provides the GNSS antenna location for underwater images collected at Looe Key, Florida, in July 2021, using the SQUID5 Structure-from-Motion (SfM) system, a towed-surface vehicle with five downward-looking underwater cameras developed by the U.S. Geological Survey. The GNSS antenna location for the time of each image capture is presented with greater precision than is stored in the individual image EXIF headers due to decimal place limitations of the EXIF format.

Purpose:

The underwater images and associated location data were collected to provide high-resolution elevation data and precisely co-registered, full-color orthomosaic base maps for use in environmental assessment and monitoring of the coral reef and surrounding seafloor habitat. Additionally, the data were collected to evaluate their potential to improve USGS scientific efforts including seafloor elevation and stability modeling, and small-scale hydrodynamic flow modeling.

Supplemental_Information:

Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-633-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-301-FA 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: 20210715
Ending_Date: 20210719

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -81.40955034
East_Bounding_Coordinate: -81.40075500
North_Bounding_Coordinate: 24.54725136
South_Bounding_Coordinate: 24.54395879

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:90d9c75d-8256-46d6-8440-36ef400e5f3b

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seabed
Theme_Keyword: Global Positioning System (GPS) observations

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Physical Habitats and Geomorphology

Theme:

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

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: reef ecosystems
Theme_Keyword: geospatial datasets
Theme_Keyword: remote sensing
Theme_Keyword: visible light imaging
Theme_Keyword: structure from motion

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
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Looe Key
Place_Keyword: State of Florida

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

Data_Set_Credit:

Data collection was funded by the U.S. Geological Survey Pacific Coastal Marine Science Center and the U.S. Geological Survey Saint Petersburg Coastal and Marine Science Center. The authors would like to thank Dr. Jason Spadaro, Assistant Professor, Marine Science and Technology, College of the Florida Keys for installing calibration targets on the reef, Lisa Symons, Regional Response Coordinator, and the staff of the Eastern Region, Office of National Marine Sanctuaries, NOAA Florida Keys National Marine Sanctuary, for coordination efforts.

Native_Data_Set_Environment: Microsoft Windows 10
Cross_Reference:

Citation_Information:

Originator: Gerald A. Hatcher
Originator: Jonathan A. Warrick
Originator: Andrew C. Ritchie
Originator: Evan T. Dailey
Originator: David G. Zawada
Originator: Christine Kranenburg
Originator: Kimberly K. Yates
Publication_Date: 2020
Title:

Accurate bathymetric maps from underwater digital imagery without ground control

Other_Citation_Details:

Hatcher, G.A., Warrick, J.A., Ritchie, A.C., Dailey, E.T., Zawada, D.G., Kranenburg, C., and Yates, K.K., 2020, Accurate bathymetric maps from underwater digital imagery without ground control: Frontiers in Marine Science, v. 7, art. 525, doi:10.3389/fmars.2020.00525

Online_Linkage: https://doi.org/10.3389/fmars.2020.00525

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the position data used for SfM data processing is based on the accuracy of the post-processed GNSS navigation data, which produced a 10-Hz vehicle trajectory with an estimated 2-sigma accuracy of 10 cm horizontal and 15 cm vertical. Note that the accuracy of the positions in the image EXIF headers are GNSS antenna positions and are limited to six decimal places, whereas the positions in the external navigation file are accurate to ten decimal places and are therefore highly recommended for use in SfM processing to produce the highest quality derived products.

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:

Positions provided in the navigation file (SQUID5_LKR_2021_Image_Locations.txt) have an estimated 2-sigma horizontal accuracy of 10 cm. The accuracy of the positions in the image EXIF headers are reduced due to field size limitations for storing latitude/longitude.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Positions provided in the navigation file (SQUID5_LKR_2021_Image_Locations.txt) have an estimated 2-sigma vertical accuracy of 15 cm.

Lineage:

Process_Step:

Process_Description:

SQUID-5 NAVIGATION PROCESSING Raw GNSS data received by the antenna mounted atop the SQUID-5 were recorded at 10 Hz by a dual-frequency survey-grade GNSS receiver, which was post-processed and differentially corrected against a local base station located 14 Km from the survey site, in Novatel's GrafNav software (v. 8.80.2720; https://novatel.com/products/waypoint-post-processing-software/grafnav) to produce 10-Hz SQUID-5 trajectories. The SQUID-5 trajectories, in combination with precisely recorded image capture event times, are used to generate SQUID-5 GNSS antenna positions at the moment of each image capture (SQUID5_LKR_2021_Image_Locations.txt). The positions in the SQUID-5 navigation file represent the position of the SQUID-5 GNSS antenna reference point (ARP), not the position of the cameras or features imaged. To determine actual image positions, photogrammetric software such as Agisoft Metashape can be used to apply the lever arm offsets (in the camera frame of reference) from the GNSS antenna reference point to the camera lens. Using this method the following values for each camera were calculated for x,y,z in units of meters. Camera 13, 0.028 m(x), 0.016 m(y), 0.822 m(z); Camera 39, 0.274 m(x), -0.106 m(y), 0.912 m(z); Camera 75, 0.128 m(x), 0.562 m(y), 0.741 m(z); Camera 82, -0.015 m(x), -0.570 m(y), 0.765 m(z).

Process_Date: 20211110
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Christine J. Kranenburg
Contact_Organization:

U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center

Contact_Position: Cartographer
Contact_Address:

Address_Type: Physical and Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ckranenburg@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 93,885

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0000000001
Longitude_Resolution: 0.0000000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (2011)
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Datum 1983 (2011)
Altitude_Resolution: 0.001
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: SQUID5_LKR_2021_Image_Locations.txt
Entity_Type_Definition:

The comma-separated American Standard Code for Information Interchange (ASCII) text file, SQUID5_LKR_2021_Image_Locations.txt contains the post-processed towed surface vehicle navigation GNSS data (position of the towed surface vehicle at the moment of each image capture).

Entity_Type_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: ImageFile
Attribute_Definition:

File names of individual images. See the metadata file with the accompanying raw images for details on the file-naming convention.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain:

Unique number for raw image. See the metadata file with the accompanying raw images for details on the file-naming convention.

Attribute:

Attribute_Label: Latitude
Attribute_Definition:

Latitude of towed surface vehicle GNSS antenna position at the moment of each image capture, in decimal degrees NAD83(2011).

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 24.54395879
Range_Domain_Maximum: 24.54725136
Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: Longitude
Attribute_Definition:

Longitude of towed surface vehicle GNSS antenna position at the moment of each image capture, in decimal degrees NAD83(2011).

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -81.40955034
Range_Domain_Maximum: -81.40075500
Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: Altitude (NAD83 Ellipsoid Height)
Attribute_Definition:

Altitude of towed surface vehicle GNSS antenna position at the moment of each image capture, in meters above the NAD83 ellipsoid.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -22.725
Range_Domain_Maximum: -21.026

Overview_Description:

Entity_and_Attribute_Overview:

SQUID-5 towed surface vehicle Navigation Data (SQUID5_LKR_2021_Image_Locations.txt) - Contains a comma-delimited text (TXT) file of the precise post-processed GNSS position of the towed surface vehicle at the precise initiation event time of each image capture; see the Entity_and_Attribute_Information section and Detailed_Description for more information on the variables reported in the TXT file, and see the Lineage section and towed surface vehicle NAVIGATION PROCESSING Process_Step for information on how to compute the precise image positions from the towed surface vehicle positions using photogrammetric software and applying lever arm offsets between the towed surface vehicle GNSS antenna and camera lens.

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - CMGDS

Contact_Address:

Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 1-831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Resource_Description:

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: comma-delimited text
Format_Information_Content:

Text (TXT) files can be opened directly with any text-editing software.

File_Decompression_Technique: None
Transfer_Size: 6.25

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9WSF09G

Access_Instructions:

Antenna position data at the locations of image collection can be downloaded as a single text file by going to the Network_Resource_Name link and scrolling down to the Location-Elevation Data section.

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20221005
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/CMGDS_DR_tool/DR_F7HD7TKM/DR_P9WSF09G/SQUID5_LKR_2021_Image_Locations_metadata.html>