sw109sc_video_observations

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?
   Phillips, Eleyne, Dartnell, Pete, Edwards, Brian, Golden, Nadine, Krigsman, Lisa, and Gilbane, Lisa, 2013, sw109sc_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

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -120.552933
   East_Bounding_Coordinate: -118.276947
   North_Bounding_Coordinate: 34.513517
   South_Bounding_Coordinate: 33.280810
   

3. What does it look like?

   https://pubs.usgs.gov/ds/781/video_observations/images/sw109sc_video_observations.jpg (JPEG)

   Location map of video observations along the California coastline.

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

   Beginning_Date: 10-Aug-2009

   Ending_Date: 21-Aug-2009

   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 (2,380)
   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?

   sw109sc_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
   Sand	Between .2 cm or .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
   Sand	Between .2 cm or .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
   Medium	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
   Low	No plant cover available for potential refuge for both juvenile and adult species
   Medium	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
   no	Denote no biological cover.
   yes	Denote that biological cover is present.

   INTERFACE

   substrate change (Source: USGS)

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

   ALGAE

   Algae observed on the seafloor (Source: USGS)

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

   ANEMONE_AG

   aggregating anemone (Source: USGS)

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

   ANEMONE_SO

   solitary anemone (Source: USGS)

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

   ANEMONE_TU

   tube anemone (Source: USGS)

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

   ANTHR_FISH

   fishing gear (Source: USGS)

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

   ANTHR_GAUG

   anthropogenic gouge (Source: USGS)

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

   ANTHRO

   anthropogenic material (Source: USGS)

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

   ANTHRO_A

   assignable anthro key (Source: USGS)

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

   BAT_STAR

   bat star (Source: USGS)

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

   BIOTURB

   bioturbation of sediment (Source: USGS)

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

   BLOOD_STAR

   blood star (Source: USGS)

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

   BRACH

   brachiopod (Source: USGS)

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

   BRANCH_BRY

   branching bryozoan (Source: USGS)

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

   BRANCHIOPO

   branchiopod (Source: USGS)

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

   BRIT_IN

   brittle star in sediment (Source: USGS)

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

   BRIT_ON

   brittle star on sediment (Source: USGS)

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

   BRYOZOAN

   bryozoan (Source: USGS)

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

   COBBLE_ISO

   isolated cobble (outsized clast) (Source: USGS)

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

   COQUINA

   coquina (Source: USGS)

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

   CRAB

   Crab (Source: USGS)

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

   CRAB_CNCR

   cancer crab (Source: USGS)

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

   CRAB_HERMI

   hermit crab (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.

   CURRENT_SC

   current scour in sediment (Source: USGS)

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

   DEPRESSION

   depression in sediment - occasionally feeding pits (Source: USGS)

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

   DRIFT_WEED

   detached algae or kelp (Source: USGS)

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

   EGG_CASE_C

   chondrichthyes egg case (Source: USGS)

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

   EGG_CASE_M

   mollusc egg case (Source: USGS)

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

   ENCUSTING

   encrusting invertebrates (Source: USGS)

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

   FISH

   unassigned fish (Source: USGS)

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

   FISH_A

   placeholder fish species for on-the-fly identification (Source: USGS)

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

   FISH_B

   placeholder fish species for on-the-fly identification (Source: USGS)

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

   FISH_C

   placeholder fish species for on-the-fly identification (Source: USGS)

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

   FLATFISH

   flatfish (Source: USGS)

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

   FLESHY_PEN

   fleshy sea pen (Source: USGS)

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

   FRILL_CUC

   frilly sea cucumber (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.

   GEO_A

   placeholder for definable geologic descriptor (Source: USGS)

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

   GEO_B

   placeholder for definable geologic descriptor (Source: USGS)

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

   GEO_C

   placeholder for definable geologic descriptor (Source: USGS)

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

   GOBY

   goby (Source: USGS)

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

   GORG

   gorgonian (Source: USGS)

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

   GREENLING

   kelp greenling (Source: USGS)

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

   GREY_PUFFB

   grey puffball sponge (Source: USGS)

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

   HAGFISH

   hagfish (Source: USGS)

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

   HYDROCORAL

   hydrocoral (Source: USGS)

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

   HYDROID

   hydroid (Source: USGS)

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

   INTERFAC_1

   interface in substrate type during 10-second observation window (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.

   LINGCOD

   lingcod (Source: USGS)

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

   LOBSTER

   lobster (Source: USGS)

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

   MEDIASTER

   mediaster (Source: USGS)

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

   METRIDIUM

   metridium (Source: USGS)

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

   MOUND

   sediment mound - generally related to burrowing activity (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.

   ORANGE_PUF

   orange puffball sponge (Source: USGS)

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

   PINCUSHION

   pincushion star (Source: USGS)

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

   PINK_PIAS

   pink pisaster (Source: USGS)

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

   PROSTCNID

   prostrate cnidarian (Source: USGS)

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

   RAINBOW_ST

   rainbow star (Source: USGS)

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

   RATFISH

   ratfish (Source: USGS)

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

   RAY

   ray (Source: USGS)

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

   RIP_DEGRAD

   degraded ripples (Source: USGS)

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

   RIP_MEGA

   megaripples (Source: USGS)

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

   RIPPLE

   ripple (Source: USGS)

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

   ROCK_BROKE

   broken blocky rock (Source: USGS)

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

   ROCK_FRACT

   fractured rock (Source: USGS)

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

   ROCK_ISO

   rock island (in sediment) (Source: USGS)

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

   ROCK_SED

   sedimentary rock (Source: USGS)

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

   ROCK_TALUS

   rock talus (Source: USGS)

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

   ROCKFISH

   rockfish (Source: USGS)

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

   SAND_CHNL

   channel between rocky outcrops filled with sand (Source: USGS)

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

   SAND_DOLLA

   sand dollars (Source: USGS)

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

   SAND_STAR

   sand star (Source: USGS)

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

   SCULPIN

   sculpin (Source: USGS)

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

   SEA_CUC

   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_PEN

   pennatulid (Source: USGS)

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

   SEA_SLUG

   sea slug (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

   sea whip (Source: USGS)

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

   SHARK

   shark (Source: USGS)

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

   SHELL_SCAT

   scattered shells (Source: USGS)

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

   SHRIMP

   shrimp (Source: USGS)

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

   SKATE

   skate (Source: USGS)

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

   SPONGE3D

   sponge three dimensional (Source: USGS)

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

   STAR_BASK

   basket star (Source: USGS)

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

   STAR_LEATH

   leather star (Source: USGS)

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

   STOMUS

   sebastomus (Source: USGS)

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

   SUN_STAR

   sun star (Source: USGS)

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

   TRACKS_TRA

   tracks and trails (biogenic in sediment) (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.

   TUNICATE

   tunicate (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.

   VIS_LESS_1

   visibility <1m (Source: USGS)

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

   VIS_LESS_H

   visibility <.5m (Source: USGS)

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

   VIS_MORE_1

   visibility >1m (Source: USGS)

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

   WHIP_PEN

   pennatulid (short) (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 in this area, zone 2 (intertidal to 30 meters), 3 (30 to 100 meters) and 4 (greater than 100 meters), and slope classes 1 (0 to 5 degrees), 2 (5 to 30 degrees), 3 (30 to 60 degrees) and 4 (60 to 90 degrees). Zone 1 (intertidal) is 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?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Eleyne Phillips
   • Pete Dartnell
   • Brian Edwards
   • Nadine Golden
   • Lisa Krigsman
   • Lisa Gilbane
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. Jackson Currie, Peter Harkins, Hank Chezar, and Tim Elfers at the USGS Marine Facility (Santa Cruz, CA) contributed field support and logistical support.
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
   

   US

   831-427-4747 (voice)

   pcmsc_data@usgs.gov

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?

   Date: 2011 (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. On shore 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

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?
   Water proof camera is submerged and connected to GPS receiver at the surface with Red Hen Systems VMS 300 hardware. Georeferenced video and still photos are collected. 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?
   Observation are from one minute intervals. Some gaps in observations exist due to technical problems or sediment dispersion covering the camera lens.
5. How consistent are the relationships among the observations, including topology?
   Point features present.

How can someone get a copy of the data set?

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? The .zip file (https://pubs.usgs.gov/ds/781/video_observations/data/sw109sc_video_observations.zip) includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as 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:	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: 0.40
     Network links:	https://pubs.usgs.gov/ds/781/video_observations/data/sw109sc_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)