CRED Gridded Bathymetry of East Gardner Pinnacles (100-016) in the Northwestern Hawaiian Islands

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Frequently anticipated questions:

What does this data set describe?

Title:
CRED Gridded Bathymetry of East Gardner Pinnacles (100-016) in the Northwestern Hawaiian Islands
Abstract:
File 100-016b is a 60-m ASCII grid of depth data collected near E Gardner Pinnacles in the Northwestern Hawaiian Islands as of May 2003. This grid has been produced as part of the "Bathymetric Atlas of the Northwestern Hawaiian Islands -- A Planning Document for Benthic Habitat Mapping -- Draft -- May 2003. Data sources for the downloadable grids include: multibeam bathymetry from Simrad EM1002 and EM120 sonars aboard the R/V Kilo Moana collected in October/November 2003; multibeam bathymetry data from a SeaBeam 210 sonar aboard the R/V Kai'imikai-O-Kanaloa collected in 2000-2002; LIDAR data obtained using the LADS MK II lidar system; and depth data derived from IKONOS satellite imagery. No tidal corrections have been applied to the data. The data source location for each type of data is indicated in the "dot plot" browse objects. Additional single-beam bathymetric data are available in this area and are indicated on the 100-016b Plot C browse object, but these less accurate depths are not included in the downloadable grid. Multibeam data were processed using SABER editing software and MBSystem and multibeam, LIDAR and IKONOS data were integrated using MBSystem, and GMT. Grid spacing is 60-m, horizontal accuracy is 20m (no differential GPS correctors applied), vertical accuracy is depth dependent (~1% of water depth), WGS84 datum. These data are not to be used for navigation.
Supplemental_Information:

Browse_Graphic_File_Description These files shows all data available (multibeam, LIDAR, IKONOS depths, and single-beam echosounder)

Browse_Graphic_File_Type JPEG

  1. How should this data set be cited?

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), 200305, CRED Gridded Bathymetry of East Gardner Pinnacles (100-016) in the Northwestern Hawaiian Islands.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -167.817
    East_Bounding_Coordinate: -166.849
    North_Bounding_Coordinate: 25.849
    South_Bounding_Coordinate: 25.1

  3. What does it look like?

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

    Beginning_Date: 2000
    Ending_Date: 2003
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: raster digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Raster data set. It contains the following raster data types:

      • Dimensions 1345 x 1586 x 1, type Grid Cell

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 3
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -177.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using Row and Column
      Abscissae (x-coordinates) are specified to the nearest 60.482560
      Ordinates (y-coordinates) are specified to the nearest 60.482560
      Planar coordinates are specified in meters

      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?

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?

    1) Joyce E. Miller, Joint Institute for Marine and Atmospheric Research, University of Hawaii/ Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center 2) Dr. Bruce Appelgate and Paul Johnson, Hawaii Mapping Research Group, University of Hawaii 3) Dr. John R. Smith, Hawaii Undersea Research Laboratory, University of Hawaii. 4) Dr. Richard Stumpf and Kristine Holderied, NOAA National Center for Coastal Ocean Science 5) Dr. Michael Parke, Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center

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

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    1125B Ala Moana Blvd.
    Honolulu, HI 96814

    (808) 983-3776 (voice)
    (808) 983-2902 (FAX)
    pibhmc@soest.hawaii.edu

    Contact_Instructions: e-mail preferred

Why was the data set created?

The data provide baseline information about the location of bathymetric data that are available in the NWHI as of May 2003. The data have been synthesized as a starting point for formulation of a coordinated NOAA plan for future work in the area and as a guideline to data quality and usefulness for a variety of purposes, including coral reef analyses, reserve, sanctuaries and fisheries interests, and charting.

How was the data set created?

  1. From what previous works were the data drawn?

    Simrad EM 120 (source 1 of 6)
    Dr. Bruce Appelgate & Paul Johnson, University of Hawaii, Unknown, Simrad EM 120 multibeam bathymetric data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    Simrad EM 120 (12 kHz) bathymetry and imagery data were collected in depths of ~100m and greater. The EM 120 system was placed in stand-by mode in shallower water due to high noise levels.

    Simrad EM1002 (source 2 of 6)
    Dr. Bruce Appelgate & Paul Johnson, University of Hawaii, Unknown, Simrad EM1002 Bathymetric Data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    Simrad EM 1002 (95 kHz) bathymetry and imagery data were collected in depths of ~20-1000m. The EM 1002 system was placed in stand-by mode in water depths greater than ~500 m.

    SeaBeam 210 (source 3 of 6)
    Dr. John R. Smith, University of Hawaii, Unknown, SeaBeam 210 multibeam bathymetric data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    The SeaBeam 210 multibeam sonar system is a hull-mounted, roll and pitch compensated bathymetric deep seafloor mapping system capable of ensonifying a swath 70-80% of the water depth. These data were used to plan and lay out the KM0206 multibeam surveys. The SeaBeam bathymetric data, however, are of sufficient quality to provide depth information that can be used for determination of the 25-, 50, and 100-fm boundaries.

    Simrad EK50 (source 4 of 6)
    Joyce E. Miller, Joint Institute for Marine and Atmospheric Research, Unknown, Simrad EK50 single-beam echosounder data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    The depth information was used to plan and layout the 25-fm survey lines, which facilitated more efficient surveying. The QTC system is designed for use in bottom classification; processing and analysis of the QTC information for benthic habitat mapping is on-going.

    IKONOS (source 5 of 6)
    Dr. Richard Stumpf and Kristine Holderied, NOAA National Ocean Services, Unknown, IKONOS estimated depths.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    IKONOS estimated depth data are used to map very shallow water, up to 16 meters in depth.

    NOS Single-beam (source 6 of 6)
    Dr. Michael Parke, NOAA Coral Reef Ecosystem Division/Pacific Island Fisheries Sciences Center, Unknown, NOS Single-beam data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    Historical data are used for water depth data in areas not surveyed for this project.

  2. How were the data generated, processed, and modified?

    Date: 10-Dec-2003 (process 1 of 1)
    Metadata imported

  3. What similar or related data should the user be aware of?

    NOAA, U.S. Dept. of Commerce, National Ocean Service, 200303, Atlas of the Shallow-Water Benthic Habitats of the Northwestern Hawaiian Islands.

    Online Links:

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

  1. How well have the observations been checked?

    Horizontal accuracy is ~20 m as data were collected using GPS with no differential corrections. Vertical accuracy of data is data type and depth dependent; no tidal corrections were applied multibeam, IKONOS or single-beam data. Multibeam echosounder data are good to approximately 1% of water depth (depth ranges from ~10-5000m) ; IKONOS satellite depths are estimated to have a vertical accuracy of plus or minus 15 per cent; LIDAR data are accurate to IHO class 1 standards and are tide corrected.

  2. How accurate are the geographic locations?

    Variable

  3. How accurate are the heights or depths?

    Variable

  4. Where are the gaps in the data? What is missing?

    Varies

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

    These data are believed to be logically consisten though no tests were performed

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: These data are NOT TO BE USED FOR NAVIGATION

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

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    1125B Ala Moana Blvd.
    Honolulu, HI 96814

    (808) 983-3776 (voice)
    (808) 983-2902 (FAX)
    pibhmc@soest.hawaii.edu

    Contact_Instructions: e-mail preferred
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any 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-Mar-2011
Metadata author:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
1125B Ala Moana Blvd.
Honolulu, HI 96814

(808) 983-3776 (voice)
(808) 983-2902 (FAX)
pibhmc@soest.hawaii.edu

Contact_Instructions: e-mail preferred
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.13 on Fri May 24 06:52:51 2013