NOAA Point Shapefile - 100m2 Fish Density for Virgin Passage, United States Virgin Islands, Project NF-10-03-USVI, 2010, WGS84

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Frequently anticipated questions:


What does this data set describe?

Title:
NOAA Point Shapefile - 100m2 Fish Density for Virgin Passage, United States Virgin Islands, Project NF-10-03-USVI, 2010, WGS84
Abstract:
This data contains densities of fishes detected using mobile fisheries sonar on board the NOAA Ship Nancy Foster. The data were acquired in concert with a multibeam bathymetry survey of Virgin Passage, off the coast of United States Virgin Islands in 2010. Fish densities are presented by size classes, corresponding to individual lengths inferred from the intensity of acoustic target return, in units of fish per 100 square meters.
  1. How should this data set be cited?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Center for Coastal Ocean Science (NCCOS), Center for Coastal Fisheries and Habitat Research (CCFHR), Unpublished material, NOAA Point Shapefile - 100m2 Fish Density for Virgin Passage, United States Virgin Islands, Project NF-10-03-USVI, 2010, WGS84.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -65.250371
    East_Bounding_Coordinate: -65.086657
    North_Bounding_Coordinate: 18.244338
    South_Bounding_Coordinate: 18.178161

  3. What does it look like?

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

    Beginning_Date: 19-Mar-2010
    Beginning_Time: Unknown
    Ending_Date: 26-Mar-2010
    Ending_Time: Unknown
    Currentness_Reference: ground condition

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

  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):

      • Entity Point (11781)

    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?

    Virgin_Passage_2010
    Fish Distrubution in Virgin Passage, United States Virgin Islands 2010. Fish are divided into three size classes small(<11cm), medium(11cm-29cm), and Large(>29cm). Each point represents 100 square meter interval and the fish in that interval. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    FID
    Unique Feature Identifier (Source: ERSI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Geometric Shape (Source: ERSI)

    Defines Geometry of shape

    Interval
    Area of the survey divided into 100 meter square sections (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:1
    Maximum:970

    Latitude
    The angular distance north or south of the earth's equator, measured in degrees. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:18.178161
    Maximum:18.244338

    Longitude
    The angular distance East or West from the Prime Meridian, measured in deqrees. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:-65.086657
    Maximum:-65.250371

    Sm_Fish
    Average Size of Small Fish <11cm in a given interval. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:10.996956
    Units:cm

    Sm_Density
    Density of Small Fish(<11cm) in a given interval. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:19.499727

    Md_Fish
    Average Size of Medium Fish between 11cm and 29cm in a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:28.992504
    Units:cm

    Md_Density
    Density of Medium Size Fish(between11cm and 29cm) in a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:44.503576

    Lg_Fish
    Average Size of Large Fish >29cm in a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:199.307813
    Units:cm

    Lg_Density
    Density of Large Fish >29cm in a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:14.31356

    Density
    All fish in a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:22.610517

    Dist_above
    The average range in meter off the seafloor of fish in a given interval. (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:0
    Maximum:21.883324
    Units:Meter

    Date
    Average Date of the data during collection for a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:3/19/2010
    Maximum:3/26/2010

    EST
    Average Eastern Standard Time of the data during collection for a given interval (Source: Center for Coastal Fisheries and Habitat Research (CCFHR))

    Range of values
    Minimum:12:00 AM
    Maximum:11:59 PM


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Department of Commmerce (DOC), National Oceanic and Atmospheric Administration (NOAA), Nation Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Fisheries and Habitat Research (CCFHR), Applied Ecology and Restoration Research Branch
    Attn: Chris Taylor
    Ecologist
    101 Pivers Island Road
    Beaufort, North Carolina 28516

    2527283595 (voice)
    chris.taylor@noaa.gov

    Hours_of_Service: Monday-Friday 8:00am - 4:30pm EST


Why was the data set created?

To design and implement a mobile fisheries sonar survey in concert with multibeam echosounder hydrographic surveys to assess and map fish densities and biomass within management priority areas.2. To assess distribution of fish densities relative to management areas and habitat types. 3. To assess location and size of purported reef fish spawning aggregations.


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: 2010 (process 1 of 4)
    Acoustic data was collected aboard the NOAA Ship Nancy Foster using ES120-7C and ES38-B splitbeam transducers. The transducers was deployed via a hull mounting bracket. Kongsberg ES transceiver and Simard ES60 software was used in the data acquisition. Data was collected during all shifts of multibeam survey.

    Date: 2010 (process 2 of 4)
    Echoview 4 was used in this step of the data processing. The EK60 .raw file format was edited for erroneous ping returns and acoustic noise. Fish were track using a tracking algorithm and the fish tracks were export in a .csv format.

    Date: 2010 (process 3 of 4)
    A R script was used to calculate the density and size of fish through out the water column. Then projected in 100 square meter resolution ArcGIS shapefile.

    Date: 2010 (process 4 of 4)
    Arc Catalog was used to merge the daily shapefiles into one cruise shapefile.

  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?

    These data consist of fish densities in St. Johns Shelf, United States Virgin Islands. The data was collected during corresponding multibeam operations.

  5. How consistent are the relationships among the observations, including topology?

    Not applicable


How can someone get a copy of the data set?

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

Access_Constraints: Please cite any use of this data.
Use_Constraints: Not for Navigation

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

    Department of Commmerce (DOC), National Oceanic and Atmospheric Administration (NOAA), Nation Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Fisheries and Habitat Research (CCFHR), Applied Ecology and Restoration Research Branch
    Attn: Chris Taylor
    101 Piver Island Road
    Beaufort, North Carolina 28516

    2528380833 (voice)

  2. What's the catalog number I need to order this data set?

    Offline Data

  3. What legal disclaimers am I supposed to read?

    These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 20-Dec-2012
Last Reviewed: 19-Jan-2012
Metadata author:
Department of Commmerce (DOC), National Oceanic and Atmospheric Administration (NOAA), Nation Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Fisheries and Habitat Research (CCFHR), Applied Ecology and Restoration Research Branch
Attn: Erik Ebert
101 Piver Island Road
Beaufort, North Carolina 28516

2527288751 (voice)
erik.ebert@noaa.gov

Hours_of_Service: Monday-Friday 8:00am-5:00pm EST
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.13 on Fri Oct 24 10:44:27 2014