Physical, environmental, and substrate observations derived from underwater video collected offshore of south-central California in support of the Bureau of Ocean Energy Management Cal DIG I offshore alternative energy project

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Kuhnz, Linda A., and Cochrane, Guy R., 20220108, Physical, environmental, and substrate observations derived from underwater video collected offshore of south-central California in support of the Bureau of Ocean Energy Management Cal DIG I offshore alternative energy project: data release DOI:10.5066/P9QQZ27U, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

   Online Links:

   • https://doi.org/10.5066/P9QQZ27U

   This is part of the following larger work.
   Cochrane, Guy R., Kuhnz, Linda A., Dartnell, Peter, Gilbane, Lisa, and Walton, Maureen A., 2022, Multibeam echo sounder, video observation, and derived benthic habitat data offshore of south-central California in support of the Bureau of Ocean Energy Management Cal DIG I, offshore alternative energy project: data release DOI:10.5066/P9QQZ27U, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

   Online Links:

   • https://doi.org/10.5066/P9QQZ27U

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -121.933657
   East_Bounding_Coordinate: -121.057607
   North_Bounding_Coordinate: 35.761625
   South_Bounding_Coordinate: 34.574285
   

3. What does it look like?

   Cal DIG_I_Substrate_Component.jpeg (JPEG)

   Quick view of Cal DIG I substrate observations

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 02-Feb-2019

   Ending_Date: 26-Oct-2020

   Currentness_Reference:

   ground condition at time data were collected.

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: comma-delimited text
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      This is a point data set. It contains the following vector data types (SDTS terminology):
      • Point (8332)
   2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257222101.
      
7. How does the data set describe geographic features?

   Cal DIG I Substrate CSV file

   File of physical habitat observations with x, y, and z coordinates (Source: Producer defined.)

   FID

   feature identity number (Source: Esri)

   Range of values
   Minimum:	0
   Maximum:	8331

   Primary_su

   primary substrate class (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Primary_mo

   primary substrate modifier (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Secondary_

   secondary substrate class (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Secondary1

   secondary substrate modifier (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Tertiary_s

   tertiary substrate class (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Slope_deg

   slope class estimated from video when ROV orientation allows (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   rugosity

   rugosity class (Source: Coastal and Marine Ecological Classification Standard)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   depth_mete

   ROV depth (Source: Valeport)

   Range of values
   Minimum:	-955.4
   Maximum:	1175.8
   Units:	meters
   Resolution:	0.1

   oxygen_ml_

   dissolved oxygen at ROV (Source: Sea-Bird Scientific)

   Range of values
   Minimum:	0.0
   Maximum:	0.874
   Units:	ml/L
   Resolution:	0.001

   salinity

   seawater salinity at ROV (Source: Sea-Bird Scientific)

   Range of values
   Minimum:	0.0
   Maximum:	34.59
   Units:	PSU
   Resolution:	0.01

   temperatur

   water temperature at ROV (Source: Valeport)

   Range of values
   Minimum:	0.0
   Maximum:	7.364
   Units:	degrees celsius
   Resolution:	0.001

   video_sequ

   ROV dive number (Source: Monterey Bay Aquarium Research Institute or Ocean Exploration Trust)

   Formal codeset
   Codeset Name:	Coastal and Marine Ecological Classification Standard
   Codeset Source:	Federal Geographic Data Committee

   Longitude

   Longitude in NAD83 coordinate system (Source: Esri)

   Range of values
   Minimum:	-121.933657
   Maximum:	-121.057607
   Units:	ESRI
   Resolution:	0.000001

   Latitude in NAD83 coordinate system

   ESRI (Source: Esri)

   Range of values
   Minimum:	34.574285
   Maximum:	35.761625
   Units:	ESRI
   Resolution:	0.000001

   Induration

   seafloor induration class (Source: Coastal and Marine Ecological Classification Standard)

   Value	Definition
   3	soft substrate
   2	mixed substrate
   1	hard substrate

   Entity_and_Attribute_Overview:

   Comma-separated file of substrate observations made from underwater video and classified using CMECS

   Entity_and_Attribute_Detail_Citation:

   Federal Geographic Data Committee, Marine and Coastal Spatial Data Subcommittee, 2012, Coastal and Marine Ecological Classification Standard: FGDC, 343 p., accessed March 10, 2021, at https://www.fgdc.gov/standards/projects/cmecs-folder/CMECS_Version_06-2012_FINAL.pdf

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Linda A. Kuhnz
   • Guy R. Cochrane
2. Who also contributed to the data set?
3. To whom should users address questions about the data?
   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   Attn: PCMSC Science Data Coordinator

   2885 Mission Street

   Santa Cruz, CA
   

   831-427-4747 (voice)

   pcmsc_data@usgs.gov

Why was the data set created?

These data were used to ground truth a supervised classification of multibeam echosounder (MBES) data into Coastal and Marine Ecological Classification Standards (CMECS) polygons. This project was conducted to map surficial geology and benthic habitat as part of the USGS/BOEM Interagency Agreement M17PG0021 titled California Deepwater Investigations and Ground-truthing I (Cal DIG I). These data are intended to provide regional surficial geology and benthic habitat information in an area of interest for offshore wind energy development. These data are also intended for science researchers, students, policy makers, and the public. These data can be used in GIS and statistical analysis projects, or other software to spatially identify geomorphologic biota, surficial lithology, and biotopes in the study area. Field activities were augmented through the Expanding Pacific Research and Exploration of Submerged Systems (EXPRESS) collaboration (https://www.usgs.gov/centers/pcmsc/science/express-expanding-pacific-research-and-exploration-submerged-systems?qt-science_center_objects=0#qt-science_center_objects).

How was the data set created?

1. From what previous works were the data drawn?

   Kuhnz and others 2021 (source 1 of 1)

   Kuhnz, Linda A., Gilbane, Lisa, Cochrane, Guy R., and Paull, Charles K., 2021, California Deepwater Investigations and Groundtruthing (Cal DIG) I, Volume 1: Biological site characterization offshore Morro Bay: Bureau of Ocean Energy Management, online.

   Online Links:

   • https://espis.boem.gov/final%20reports/BOEM_2021-037.pdf

   Other_Citation_Details:

   Kuhnz L.A., Gilbane L., Cochrane G.R., and Paull C.K., 2021, California Deepwater Investigations and Groundtruthing (Cal DIG) I, Volume 1: Biological site characterization offshore Morro Bay: U.S. Department of the Interior, Bureau of Ocean Energy Management, OCS Study, BOEM 2021-037 72 p.

   Type_of_Source_Media: report
   Source_Contribution:

   Report describes methodology used to collect, observe seafloor physical habitats and characteristics, and annotate underwater video

2. How were the data generated, processed, and modified?

   Date: 30-Nov-2020 (process 1 of 1)

   Underwater video was collected and annotated as described in the sourced report. Person who carried out this activity:
   

   Linda Kuhnz

   Monterey Bay Aquarium Research Institute (MBARI)

   Biologist

   7700 Sandholdt Road

   Moss Landing, CA
   

   831-775-1700 (voice)

   831-775-1620 (FAX)

   linda@mbari.org

   Data sources used in this process:

   • Kuhnz and others 2021

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?
   Dissolved oxygen values were obtained with a Sea-Bird Scientific SBE 43 sensor. The sensor has an initial accuracy of 2 percent of saturation and a stability of 0.5 percent per 1000 hours of use without membrane replacement. Temperature and Salinity were measured with a Valeport miniCT sensor. The sensor has a conductivity accuracy of 0.01 MS/cm and a temperature accuracy of 0.01 degrees centigrade. Depth values were obtained with a Valeport ultraP pressure sensor. The sensor has an accuracy of 0.01 percent full scale. The accuracy of grain size, rugosity, and slope estimates based on visual assessment of video imagery and cannot be quantified.
2. How accurate are the geographic locations?
   Horizontal coordinates are based on a Sonardyne USBL tracking system with a slant range accuracy of 0.07 percent.
3. How accurate are the heights or depths?
   Depth values provided in this dataset are from pressure sensors and are not considered vertical positions. See attribute accuracy report above.
4. Where are the gaps in the data? What is missing?
   Some points in this data set have null attribute values when the attribute value could not be ascertained from the data.
5. How consistent are the relationships among the observations, including topology?
   No checks for consistency were performed on this data.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

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 and the Bureau of Ocean Energy Management as the originator(s) of the dataset and in products derived from these data.

1. Who distributes the data set? (Distributor 1 of 1)
   
   U.S. Geological Survey - CMGDS

   2885 Mission Street

   Santa Cruz, CA
   

   831-427-4747 (voice)

   pcmsc_data@usgs.gov
2. What's the catalog number I need to order this data set? These data are available in comma-delimited text format (Cal_DIG_I_Substrate_Component.csv), accompanied by CSDGM FGDC-compliant metadata.
3. What legal disclaimers am I supposed to read?

   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.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Single comma-delimited text file contains all the physical habitat observations for the data release along with ROV dive ID and geographic location in format comma-delimited text (version ArcGIS 10.7.1) CSV text file Size: 0.814
     Network links:	https://doi.org/10.5066/P9QQZ27U

   • Cost to order the data: None.

5. What hardware or software do I need in order to use the data set?

   These data can be viewed with GIS software or any text reader capable of reading comma-delimited text files.

Who wrote the metadata?

Dates:

Last modified: 08-Jan-2022

Metadata author:

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

Attn: PCMSC Science Data Coordinator

2885 Mission Street

Santa Cruz, CA

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)