z206sc_video_observations

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Frequently anticipated questions:

What does this data set describe?
Who produced the data set?
Why was the data set created?
How was the data set created?
How reliable are the data; what problems remain in the data set?
How can someone get a copy of the data set?
Who wrote the metadata?

What does this data set describe?

Title: z206sc_video_observations
Abstract:

This part of DS 781 presents video observations from cruise Z206SC in southern California. The vector data file is included in "z206sc_video_observations.zip," which is accessible from https://pubs.usgs.gov/ds/781/video_observations/data_catalog_video_observations.html.
Between 2006 and 2007, the seafloor 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. 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:

Additional information about the USGS field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=Z206SC
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.

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: Data Series DS 781, U.S. Geological Survey, Reston, VA.
Online Links:
- https://doi.org/10.3133/ds781
This is part of the following larger work.
Golden, Nadine E., 2012, California State Waters Map Series Data Catalog: Data Series DS 781, U.S. Geological Survey, Reston, VA.
Online Links:
- https://doi.org/10.3133/ds781
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
What does it look like?

https://pubs.usgs.gov/ds/781/video_observations/images/z206sc_video_observations.jpg (JPEG)
Location map of video observations along the California coastline.
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
What is the general form of this data set?
Geospatial_Data_Presentation_Form: vector digital data
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.

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)

Value	Definition
Rock	Exposed bedrock
Boulder	25.5 cm or greater
Cobble	Between 25.5 cm and 6.5 cm
Gravel	Between 6.5 and .2 cm
Coquina	broken shells and corals
Sand	Between .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)

Value	Definition
Rock	Exposed bedrock
Boulder	25.5 cm or greater
Cobble	Between 25.5 cm and 6.5 cm
Gravel	Between 6.5 and .2 cm
Coquina	Between broken shells and corals
Sand	Between .2 cm and .00625 cm
Mud	.00625 cm or smaller

SLOPE

A visual estimate of slope of the seafloor (Source: USGS)

Value	Definition
Low	Flat seafloor
Medium	Not flat or extreme.
High	Extreme rock face.

ABIO_COMP

Abiotic complexity (rugosity) or roughness of the seafloor. (Source: USGS)

Value	Definition
Low	No space available for potential refuge for both juvenile and adult species
Moderate	Some small holes and space available for potential refuge for both juvenile and adult species
High	Large holes and spaces available for potential refuge for both juvenile and adult species

BIO_COMP

Biologic Complexity (structure). (Source: USGS)

Value	Definition
Trace	No plant cover available for potential refuge for both juvenile and adult species
Low	Small amount of plant cover available for potential refuge for both juvenile and adult species
Moderate	Some plant cover available for potential refuge for both juvenile and adult species
High	High volume of plant cover available for potential refuge for both juvenile and adult species

BIO_COVER

Biologic cover (Source: USGS)

Value	Definition
Barren	Denotes no biological cover.
Low	Denotes small amount biological cover.
Moderate	Denotes some biological cover.
High	Denotes high volume biological cover is present.

ALGAE

algae (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

ANEMONE

anemone (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

BIVALVE

bivalve (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

BRITTLE STAR

brittle star (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

BYYZOAN

bryozoans (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

CRUSTACEAN

crustacean (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

CUP_CORAL

cup coral (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

DRIFTWEED

detached algae or kelp (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

FISHING_GE

Fishing Gear (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SHELL_HASH

Shell hash (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

FLATFISH

flat fish (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

GASTROPOD

gastropod (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

GORGONIAN

gorgonian (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

HOLE

biogenically hummocky seafloor (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

HYDROZAN

hydrozoan (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

INTERFACE

other interface (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

KELP

kelp (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

MOUND

mound of sediment, generally associated with burrowing (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

OCTOPUS

octopus (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

OTHER_FISH

other fish (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

ROCKFISH

rock fish (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

RUBBLE

garbage on seafloor (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SCOUR

scour (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEA_CUCUMBER

sea cucumber (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEA_HARE

sea hare (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEA_STAR

sea star (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEA_WHIP

other sea whip (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEDIMENT_R

sedimentary rock (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SEDIMENT_W

sedimentary (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

SPONGE

sponge (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

TRACKS

tracks/trails in sediment (biogenic) (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

TUBE_WORM

tube worm (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

URCHIN

urchin (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

WHITE_URCHIN

white urchin (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote presence of the species or feature.

WORM_TUBE

worm tube (Source: USGS)

Value	Definition
0	Denote absence of the species or feature.
1	Denote 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)

Value	Definition
1	Smooth sediment
2	Mixed sediment and smooth rock
3	Rugose 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?

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
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.
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

US

831-427-4747 (voice)

pcmsc_data@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?

From what previous works were the data drawn?
How were the data generated, processed, and modified?

Date: 2008 (process 1 of 6)
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 6)
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 6)
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 6)
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

Date: 19-Oct-2020 (process 5 of 6)
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:

U.S. Geological Survey

Attn: VeeAnn A. Cross

Marine Geologist

384 Woods Hole Road
Woods Hole, MA

508-548-8700 x2251 (voice)

508-457-2310 (FAX)

vatnipp@usgs.gov

Date: 21-Mar-2023 (process 6 of 6)
Metadata was modified to bring up to current USGS PCMSC standards. USGS Thesaurus and keywords were added, Point of Contact and Metadata Contact information was updated, and Process Steps were refined. Information about the data available for download and different Network Resource Name links and details were given in the Standard Order Process section. Minor typos were corrected. No data information was changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:

Susan A Cochran

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

Geologist

2885 Mission Street
Santa Cruz, CA

USA

(831) 460-7545 (voice)

scochran@usgs.gov
What similar or related data should the user be aware of?

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

How well have the observations been checked?
Visual observations of variable unknown accuracy
How accurate are the geographic locations?
Highly variable, on the order of 10 meters.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
Observations made without uniform protocol.
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	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.

Who distributes the data set? (Distributor 1 of 1)

U.S. Geological Survey

345 Middlefield Rd
Menlo Park, CA

USA

(650) 329-4309 (voice)
What's the catalog number I need to order this data set? The .zip file (https://pubs.usgs.gov/ds/781/video_observations/data/z206sc_video_observations.zip) includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata.
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.

How can I download or order the data?

Availability in digital form:

Data format:	The .zip file includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata. in format shapefile (version ArcMap (version 10.0, ESRI, 2011)) Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates. Size: 0.06
Network links:	https://pubs.usgs.gov/ds/781/video_observations/data/z206sc_video_observations.zip https://pubs.usgs.gov/ds/781/video_observations/data_catalog_video_observations.html https://doi.org/10.3133/ds781

Cost to order the data: none

Who wrote the metadata?

Dates:: Last modified: 21-Mar-2023
Metadata author:: U.S. Geological Survey, Pacific Coastal and Marine Science Center

Attn: PCMSC Science Data Coordinator

2885 Mission Street
Santa Cruz, CA

US

831-427-4747 (voice)

pcmsc_data@usgs.gov
Metadata standard:: Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

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