Single-beam bathymetry data collected in 2010 and 2011 in the vicinity of Arey Lagoon and Barter Islands, Alaska

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title:
Single-beam bathymetry data collected in 2010 and 2011 in the vicinity of Arey Lagoon and Barter Islands, Alaska
Abstract:
Single-beam bathymetry data were collected in 2010 and 2011 in the nearshore waters around Barter Island, Arey Island, and within Arey Lagoon, Alaska. Measurements were made from a small boat or dinghy using one of three systems: a Humminbird 898 SI Fish Finder with integrated GPS (2010 and 2011), an Ohmex Sonarmite BT integrated with a Trimble GeoHX series GPS (2011), or a Garmin Sounder with integrated GPS (2011). Each system collected single-beam water depth with accuracies better than 4 meters (m) horizontal and 25 centimeters (cm) vertical.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=ID411AR https://cmgds.marine.usgs.gov/fan_info.php?fan=L610AK Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Jones, Benjamin M., Storlazzi, Curt D., and Ohman, Karin A., 20201207, Single-beam bathymetry data collected in 2010 and 2011 in the vicinity of Arey Lagoon and Barter Islands, Alaska: data release DOI:10.5066/P9LGYO2Q, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Jones, Benjamin M., Storlazzi, Curt D., and Ohman, Karin A., 2020, Modeled 21st century storm surge, waves, and coastal flood hazards, and supporting oceanographic and geological field data (2010 and 2011) for Arey and Barter Islands, Alaska and vicinity: data release DOI:10.5066/P9LGYO2Q, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -144.029625
    East_Bounding_Coordinate: -143.656189
    North_Bounding_Coordinate: 70.140900
    South_Bounding_Coordinate: 70.076304
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/5ee2b4ee82ce3bd58d7e171e?name=BTI_20102011Bathymetry_tracklines.jpg&allowOpen=true (JPEG)
    Map of bathymetric survey tracklines
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 25-Aug-2010
    Ending_Date: 11-Jul-2011
    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 (70587)
    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 WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: WGS84
      Altitude_Resolution: 0.01
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    BTI_20102011Bathymetry_Data.csv
    Nearshore bathymetry measurements (Source: Producer defined)
    UTC_Date
    UTC date (Source: Producer defined)
    Range of values
    Minimum:08/25/2010
    Maximum:07/11/2011
    UTC_Time
    UTC time (Source: Producer defined) Unique value that represents the UTC time of acquisition in the format HH:MM:SS
    Longitude
    Longitude coordinate (Source: Producer defined)
    Range of values
    Minimum:-144.029624
    Maximum:-143.484014
    Units:Decimal degrees
    Resolution:0.000001
    Latitude
    Latitude coordinate (Source: Producer defined)
    Range of values
    Minimum:70.076304
    Maximum:70.160122
    Units:Decimal degrees
    Resolution:0.0000001
    Depth_MSL
    Water depth relative to approximate mean sea level (Source: Producer defined)
    Range of values
    Minimum:0.47
    Maximum:11.1
    Units:Meters
    Resolution:0.01
    TRUDEPTH_M
    Water depth at time of collection (Source: Producer defined)
    Range of values
    Minimum:0.38
    Maximum:12.65
    Units:Meters
    Resolution:0.01
    SYSTEM
    Instrument used to acquire data (Source: Producer defined)
    ValueDefinition
    GarminSounderGarmin Sounder with integrated GPS
    SonarmiteOhmex Sonarmite BT integrated with a Trimble GeoHX series GPS
    HumminbirdHumminbird 898 SI fishfinder with integrated GPS
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Li H. Erikson
    • Ann E. Gibbs
    • Bruce M. Richmond
    • Benjamin M. Jones
    • Curt D. Storlazzi
    • Karin A. Ohman
  2. Who also contributed to the data set?
    Arctic Landscape Conservation Cooperative (ALCC), U.S. Fish & Wildlife Service
  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?

Data were obtained to provide inputs and validation data for a numerical model, and additionally to provide baseline environmental data previously not available.

How was the data set created?

  1. From what previous works were the data drawn?
    water-level measurements (source 1 of 1)
    U.S. Geological Survey, 2020, Conductivity, temperature and depth time-series data collected in 2011 in the vicinity of Arey Lagoon and Barter Island, Alaska: U.S. Geological Survey, online.

    Online Links:

    Type_of_Source_Media: Digital Resources
    Source_Contribution:
    Water-level measurements were used to establish an approximate Mean Sea Level tidal datum and adjust the vertical datum of the 2011 bathymetry data.
  2. How were the data generated, processed, and modified?
    Date: 27-Sep-2011 (process 1 of 3)
    Single-beam bathymetry data were collected from a small boat on August 25-29, 2010 using a Humminbird 898 SI Fish Finder with integrated GPS. Accuracy is better than 4 meters (m) horizontal and 25 centimeters (cm) vertical. Data were processed using SonarWiz software and depths were extracted using automated bottom tracking methods. Depth values are meters below the water surface. The 2010 data were not adjusted to a Mean Sea Level datum.
    Date: 20-Oct-2011 (process 2 of 3)
    Single-beam bathymetry data were collected in 2011 from a small boat or dinghy using one of three systems: a Humminbird 898 SI Fish Finder with integrated GPS, an Ohmex Sonarmite BT integrated with a Trimble GeoHX series GPS, or a Garmin Sounder with integrated GPS. For shallow areas within Arey lagoon, a small dinghy with a draft of <0.5 m was equipped with the Ohmex Sonarmite; however, even with this low draft, measurements were not possible in the western part of Arey Lagoon owing to the very shallow water depths. Because the substrate was composed primarily of silt, making it unsafe for walking across, it was not possible to obtain depth measurements in this area. Each system collected single-beam water depth with accuracies better than 4 meters (m) horizontal and 25 centimeters (cm) vertical. Data were processed using SonarWiz software and depths were extracted using automated bottom tracking methods. Garmin Sounder and Ohmex Sonarmite data were processed using their respective proprietary software packages. Depth are referenced in meters to approximate mean sea level (MSL) using three months of water-level measurements obtained with concurrently recording Aquadopp and AWAC instruments.
    Date: 13-Oct-2021 (process 3 of 3)
    Edited metadata to add USGS Thesaurus keyword terms. In addition to other minor edits to correct typos. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Storlazzi, Curt D., Jones, Benjamin M., and Ohman, Karin A., 2020, Changing Storm Conditions in Response to Projected 21st Century Climate Change Scenarios and the Potential Impact on an Arctic Barrier Island Lagoon System: A Pilot Study for Arey Island and Lagoon, Eastern Arctic Alaska.

    Online Links:

    Other_Citation_Details:
    Erikson, L.H., Gibbs, A.E., Richmond, B.M., Storlazzi, C.D., Jones, B.M., and Ohman, K.A., 2020, Changing storm conditions in response to projected 21st century climate change and the potential impact on an arctic barrier island–lagoon system—A pilot study for Arey Island and Lagoon, eastern Arctic Alaska: U.S. Geological Survey Open-File report 2020-1142

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

  1. How well have the observations been checked?
    No formal accuracy assessment was performed. Standard operating procedures were used to collect all data and measurements are within the expected range.
  2. How accurate are the geographic locations?
    A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. GPS-enabled instruments used to acquire single-beam soundings of water depth are estimated to have accuracies better than 4 meters in the horizontal.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has not been conducted. GPS-enabled instruments used to acquire single-beam soundings of water depth are estimated to have accuracies better than 25 centimeters in the vertical.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted. Data has been checked for duplications and omissions. Missing data have been filled with NaN values. Where data were not collected a value of n/a value is used.

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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in csv format contained in a single zip file which also includes CSDGM FGDC compliant metadata and a survey trackline map.
  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?
  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with any text reading software.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2021
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)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P9LGYO2Q/BTI_20102011Bathymetry_metatata.faq.html>
Generated by mp version 2.9.50 on Thu Oct 14 14:47:22 2021