z206sc_video_observations

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Frequently anticipated questions:


What does this data set describe?

Title: z206sc_video_observations
Abstract:
This part of DS 781 presents video observations from cruise Z206SC for the Santa Barbara Channel region and beyond in southern California. The vector data file is included in "z206sc_video_observations.zip," which is accessible from http://pubs.usgs.gov/ds/781/video_observations/data_catalog_video_observations.html. Some of the video observations from cruise Z206SC are published in Scientific Investigations Map 3254, "California State Waters Map Series--Offshore of Ventura, California" (see sheet 6). In addition, some of the video observations will be published in three future California State Waters Map Series SIMs of the region (namely, the Offshore of Carpinteria, Offshore of Santa Barbara, Offshore of Coal Oil Point, and Offshore of Coal Oil Point map areas) [note that, at the time of this writing, one of the other three SIMs have been published: the Offshore of Carpinteria map area (SIM 3254)]. Between 2006 and 2007, the seafloor in the Offshore of Ventura, Offshore of Carpinteria, Offshore of Santa Barbara, Offshore of Coal Oil Point, Offshore of Refugio Beach, map areas in southern California was mapped by California State University, Monterey Bay, Seafloor Mapping Lab (CSUMB) and by the U.S. Geological Survey (USGS), using both multibeam echosounders and bathymetric sidescan sonar units (for example, see sheets 1, 2, and 3, SIM 3254, for details). These mapping missions combined to collect bathymetry and acoustic-backscatter data from about the 10-m isobath to out beyond the 3-nautical-mile limit of California's State Waters. To validate the interpretations of sonar data in order to turn it into geologically and biologically useful information, the USGS ground-truth surveyed the data by towing camera sleds over specific locations throughout the region. During the 2008 ground-truth cruise, the camera sled housed two video cameras (one forward looking and the other vertical looking), a high-definition video camera, and an 8-megapixel digital still camera. The video was fed in real time to the research vessel, where USGS and NOAA scientists recorded both the geologic and biologic character of the seafloor into programmable keypads once every minute. In addition to recording the seafloor characteristics, a digital still photograph was captured once every 30 seconds. This ArcGIS shape file includes the position of the camera, the time each observation was started, and the visual observations of geologic and biologic habitat.
Supplemental_Information:
Information about the data collection field activity Z-2-06-sc is at <http://walrus.wr.usgs.gov/infobank/z/z206sc/html/z-2-06-sc.meta.html>. 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 ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
  1. How might this data set be cited?
    Dartnell, Pete, Phillips, Eleyne, Golden, Nadine, Cochrane, Guy, Draut, Amy, Conrad, Jamie, Mustain, Neomi, Schroeder, Donna, Cross, Scott, and Pointner, Brayton, 2013, z206sc_video_observations:.

    This is part of the following larger work.

    Golden, Nadine E., 2013, California State Waters Map Series Data Catalog: Data Series DS 781, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -119.92137
    East_Bounding_Coordinate: -119.26310
    North_Bounding_Coordinate: 34.47285
    South_Bounding_Coordinate: 34.21149
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 06-Jul-2006
    Ending_Date: 26-Jul-2006
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Entity point (603)
    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 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
  7. How does the data set describe geographic features?
    z206sc_video_observations
    The shapefile includes vector point data of observed geologic and biologic features when each observation was taken. The shapefile can be added to any ESRI ArcMap project. (Source: USGS)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the ArcGIS features
    DATE
    Cruise Date. Month, day, year format (mmddyyy) (Source: USGS) Date of observation
    TIME
    Greenwich Mean Time (GMT) also commonly referred to as Coordinated Universal Time (UTC). (Source: USGS) Time of observation
    LATITUDE
    Latitude (Source: USGS)
    Range of values
    Minimum:34.103513
    Maximum:34.101858
    Units:Decimal degrees; Southern Hemisphere values are negative.
    LONGITUDE
    Longitude (Source: USGS)
    Range of values
    Minimum:-119.255818
    Maximum:-119.246218
    Units:Decimal degrees; Western Hemisphere values are negative.
    HEADING
    Bearing (Source: USGS) The angle measured in degrees in a clockwise direction from the north line.
    COURSE
    Direction and route (Source: USGS) Not currently used
    SPEED
    Rate of movement (Source: USGS) Not currently used
    LOGENTRY
    Comments and notes manually recorded during an observation. (Source: USGS) Annotation
    MAJOR_GEO
    Primary substrate constitutes greater than fifty percent of the seafloor during an observation. The values are based on the Wentworth scale except that granule and pebble sizes have been grouped together into a class called "gravel," and clay and silt sizes have been grouped together into a class called "mud." (Source: USGS)
    ValueDefinition
    RockExposed bedrock
    Boulder25.5 cm or greater
    CobbleBetween 25.5 cm and 6.5 cm
    GravelBetween 6.5 and .2 cm
    Coquinabroken shells and corals
    SandBetween .2 cm and .00625 cm
    Mud.00625 cm or smaller
    MINOR_GEO
    Secondary substrates constitute greater than twenty percent of the seafloor during an observation. The classes are based on the Wentworth scale except that granule and pebble sizes have been grouped together into a class called "gravel," and clay and silt sizes have been grouped together into a class called "mud." (Source: USGS)
    ValueDefinition
    RockExposed bedrock
    Boulder25.5 cm or greater
    CobbleBetween 25.5 cm and 6.5 cm
    GravelBetween 6.5 and .2 cm
    CoquinaBetween broken shells and corals
    SandBetween .2 cm and .00625 cm
    Mud.00625 cm or smaller
    SLOPE
    A visual estimate of slope of the seafloor (Source: USGS)
    ValueDefinition
    LowFlat seafloor
    MediumNot flat or extreme.
    HighExtreme rock face.
    ABIO_COMP
    Abiotic complexity (rugosity) or roughness of the seafloor. (Source: USGS)
    ValueDefinition
    LowNo space available for potential refuge for both juvenile and adult species
    ModerateSome small holes and space available for potential refuge for both juvenile and adult species
    HighLarge holes and spaces available for potential refuge for both juvenile and adult species
    BIO_COMP
    Biologic Complexity (structure). (Source: USGS)
    ValueDefinition
    TraceNo plant cover available for potential refuge for both juvenile and adult species
    LowSmall amount of plant cover available for potential refuge for both juvenile and adult species
    ModerateSome plant cover available for potential refuge for both juvenile and adult species
    HighHigh volume of plant cover available for potential refuge for both juvenile and adult species
    BIO_COVER
    Biologic cover (Source: USGS)
    ValueDefinition
    BarrenDenotes no biological cover.
    LowDenotes small amount biological cover.
    ModerateDenotes some biological cover.
    HighDenotes high volume biological cover is present.
    ALGAE
    algae (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    ANEMONE
    anemone (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    BIVALVE
    bivalve (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    BRITTLE STAR
    brittle star (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    BYYZOAN
    bryozoans (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    CRUSTACEAN
    crustacean (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    CUP_CORAL
    cup coral (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    DRIFTWEED
    detached algae or kelp (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    FISHING_GE
    Fishing Gear (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SHELL_HASH
    Shell hash (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    FLATFISH
    flat fish (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    GASTROPOD
    gastropod (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    GORGONIAN
    gorgonian (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    HOLE
    biogenically hummocky seafloor (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    HYDROZAN
    hydrozoan (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    INTERFACE
    other interface (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    KELP
    kelp (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    MOUND
    mound of sediment, generally associated with burrowing (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    OCTOPUS
    octopus (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    OTHER_FISH
    other fish (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    ROCKFISH
    rock fish (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    RUBBLE
    garbage on seafloor (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SCOUR
    scour (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEA_CUCUMBER
    sea cucumber (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEA_HARE
    sea hare (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEA_STAR
    sea star (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEA_WHIP
    other sea whip (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEDIMENT_R
    sedimentary rock (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SEDIMENT_W
    sedimentary (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    SPONGE
    sponge (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    TRACKS
    tracks/trails in sediment (biogenic) (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    TUBE_WORM
    tube worm (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    URCHIN
    urchin (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    WHITE_URCHIN
    white urchin (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    WORM_TUBE
    worm tube (Source: USGS)
    ValueDefinition
    0Denote absence of the species or feature.
    1Denote presence of the species or feature.
    DEPTH
    Depth Value (Source: USGS)
    Range of values
    Minimum:0.00
    Maximum:-300.00
    Units:Decimal meters below mean sea level.
    CLASS
    This seafloor-character class was produced using video-supervised maximum-likelihood classification of the bathymetry and backscatter (intensity of return) signals from sonar systems. Derivative roughness (rugosity) and backscatter intensity were used as variants in the classification. The substrate classes have been divided into the California Marine Life Protection Act depth zones mapped and slope classes in this area: Depth Zone 2 (intertidal to 30 meters), Depth Zone 3 (30 to 100 meters), Depth Zone 4 (greater than 100 meters), Slope Class 1 (0 to 5 degrees), Slope Class 2 (5 to 30 degrees), Slope Class 3 (30 to 60 degrees), and Slope Class 4 (60 to 90 degrees). Depth Zone 1 (intertidal) is not present in this map area (not included in this dataset). (Source: USGS)
    ValueDefinition
    1Smooth sediment
    2Mixed sediment and smooth rock
    3Rugose boulder and rock
    LINE
    Video observation camera line. (Source: USGS) Name or number of camera line
    TAPE
    MiniDV tape numbered consecutively throughout cruise. (Source: USGS) Name or number of tape

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Pete Dartnell
    • Eleyne Phillips
    • Nadine Golden
    • Guy Cochrane
    • Amy Draut
    • Jamie Conrad
    • Neomi Mustain
    • Donna Schroeder
    • Scott Cross
    • Brayton Pointner
  2. Who also contributed to the data set?
    The authors would like to thank Hank Chezar of the USGS Western Region Coastal and Marine Geology Program (in Santa Cruz and Menlo Park, CA) for field support and equipment support. Mike Boyle, Gerry Hatcher, Andy Stevenson, David Finlayson, and Neomi Mustain at the USGS Marine Facility (Redwood City, CA) contributed field support and logistical support.
  3. To whom should users address questions about the data?
    Nadine Golden
    U.S. Geological Survey, Coastal and Marine Geology
    Geographer
    400 Natural Bridges Dr.
    Santa Cruz, CA
    USA

    (831) 460-7530 (voice)
    (831) 427-4709 (FAX)
    ngolden@usgs.gov

Why was the data set created?

These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2008 (process 1 of 4)
    The camera-sled tracklines were sited through video fed up to the research vessel in real time, where USGS and NOAA scientists recorded both the geologic and biologic character of the seafloor. While the camera was deployed, observations were recorded for a 10-second period once every minute. Onshore, the observation comma-delimited text file was converted to an ArcGIS shapefile.
    Date: 05-Oct-2017 (process 2 of 4)
    Modified Distribution_Information section in metadata to facilitate data download. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
    Date: 05-Oct-2017 (process 3 of 4)
    Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
    Date: 26-Apr-2018 (process 4 of 4)
    Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
  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?
    Visual observations of variable unknown accuracy
  2. How accurate are the geographic locations?
    Highly variable, on the order of 10 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Observations made without uniform protocol.
  5. How consistent are the relationships among the observations, including topology?
    Point features present.

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:
This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey. This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    345 Middlefield Rd
    Menlo Park, CA
    USA

    (650) 329-4309 (voice)
  2. What's the catalog number I need to order this data set?
  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?

Who wrote the metadata?

Dates:
Last modified: 26-Apr-2018
Metadata author:
U.S. Geological Survey, Coastal and Marine Geology
Attn: Nadine Golden
Geographer
USGS, 400 Natural Bridges Dr
Santa Cruz, CA

(831) 460-7530 (voice)
(831) 427-4709 (FAX)
ngolden@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/cal_state_waters/z206sc_video_observations_metadata.faq.html>
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