Rugosity grid derived from gridded bathymetry of of Galvez Bank, South Galvez Bank, and 11-Mile Reef, Territory of Guam, USA.

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Frequently anticipated questions:


What does this data set describe?

Title:
Rugosity grid derived from gridded bathymetry of of Galvez Bank, South Galvez Bank, and 11-Mile Reef, Territory of Guam, USA.
Abstract:
Rugosity is derived from gridded (5 m cell size) multibeam bathymetry, aboard NOAA Ship Oscar Elton Sette. Cell values reflect the (surface area) / (planimetric area) ratio for the area contained within that cell's boundaries. They provide indices of topographic roughness & convolutedness. This data set is for Galvez Bank, South Galvez Bank, and 11-Mile Reef, Territory of Guam, USA.
Supplemental_Information:
Gridded bathymetry data were collected aboard the NOAA Ship Oscar Elton Sette, a 224' (68 m) United States National Oceanographic and Atmospheric Administration research ship. The NOAA Ship Sette's survey sensors included a 240-kHz pole-mounted Reson 8101ER sonar, which provides bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position,velocity, attitude and heading, and a Seabird SBE19 CTD used to measure sound velocity profiles. The metadata for the bathymetry is documented in this product metadata: <ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry/3Banks_Guam_5m.txt> Specific equipment configurations are documented in metadata from cruise SE1002. These metadata can be accessed at: <http://www.soest.hawaii.edu/pibhmc/pibhmc_cruise-catalog.htm>

Rugosity was calculated using the Rugosity Builder tool within the Benthic Terrain Modeler (<http://www.csc.noaa.gov/digitalcoast/tools/btm/>). References: Jenness, J. 2003. Grid surface areas: Surface area and ratios from elevation grids [Electronic manual]. Jenness Enterprises: ArcView Extensions. <http://www.jennessent.com/arcview/arcview_extensions.htm>

Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information gal_5m_rug Raster_Object_Type Grid Cell Row_Count 1869 Column_Count 1623 Vertical_Count 1 Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information sgal_5m_rug Raster_Object_Type Grid Cell Row_Count 905 Column_Count 1293 Vertical_Count 1 Spatial_Data_Organization_Information Direct_Spatial_Reference_Method Raster Raster_Object_Information ele_5m_rug Raster_Object_Type Grid Cell Row_Count 357 Column_Count 307 Vertical_Count 1

  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), 20121130, Rugosity grid derived from gridded bathymetry of of Galvez Bank, South Galvez Bank, and 11-Mile Reef, Territory of Guam, USA..

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 144.391
    East_Bounding_Coordinate: 144.500
    North_Bounding_Coordinate: 13.233
    South_Bounding_Coordinate: 12.983

  3. What does it look like?

    <http://www.soest.hawaii.edu/pibhmc/CNMI_images/GAL_5m_rug_440.jpg> (JPEG)
    Gridded Bathymetry Derivative

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

    Beginning_Date: 11-Feb-2010
    Ending_Date: 14-Mar-2010
    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?

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 55
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: .9996
      Longitude_of_Central_Meridian: -147
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000
      False_Northing: 0

      Planar coordinates are encoded using Row and Column
      Abscissae (x-coordinates) are specified to the nearest 5
      Ordinates (y-coordinates) are specified to the nearest 5
      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.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: mean lower low water
      Depth_Resolution: 0.01
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute Values

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview: none
    Entity_and_Attribute_Detail_Citation: none


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?

    NOAA PIFS, CRED, PIBHMC, JIMAR, and SOEST

  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), NOAA National Marine Fisheries Service (NMFS)
    NOAA IRC
    Honolulu, HI 96818
    USA

    808 725-5360 (voice)
    nmfs.pic.credinfo@noaa.gov

    Contact_Instructions: e-mail preferred


Why was the data set created?

The data were derived in support of NOAA Coral Reef Conservation Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems. This data set specifically addresses Objective 1 and 4: to develop high-resolution benthic maps and to characterize priority deep water reefs and associated habitats. This derivative of bathymetry provides a GIS layer that may be used for benthic and essential fish habitat characterization, and for the study of geologic features. By combining the dataset with bathymetry, backscatter, other derivatives, and in situ data, they collectively compose benthic habitat maps which are designed to be used to understand and predict moderate depth (~20m &#150; 150m) benthic habitats for different organisms that inhabit coral reef ecosystems.


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: 22-Nov-2012 (process 1 of 1)
    Rugosity was derived from the gridded multibeam bathymetry of Galvez Bank (gal5m), South Galvez Bank (sgal5m) and Eleven-mile Reef (ele5m) using the Benthic Terrain Modeler (BTM) in ArcGIS 9.3. The BTM (written for ArcGIS 8.x, 9.x or 10.x) may be downloaded from <http://dusk2.geo.orst.edu/djl/samoa/tools.html>. It includes a component for deriving rugosity using methods by Jeff Jenness that he wrote for ArcView 3.x.

  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?

    Data are collected for resource management and research purposes and are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data.

  2. How accurate are the geographic locations?

    Horizontal positioning system: GPS C/A Horizontal position accuracy: 25 meters

  3. How accurate are the heights or depths?

    Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth

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

    Complete

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

    These data are believed to be logically consistent 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 purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center (PIFSC) Coral Reef Ecosystem Division (CRED) and the Pacific Islands Benthic Habitat Mapping Center, and the Joint Institute for Marine and Atmospheric Research (JIMAR) and School of Ocean and Earth Science and Technology (SOEST), University of Hawaii as the sources of this information.

  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), NOAA National Marine Fisheries Service (NMFS)
    NOAA IRC
    Honolulu, HI 96818
    USA

    808 725-5360 (voice)
    nmfs.pic.credinfo@noaa.gov

    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: 12-Mar-2014
Last Reviewed: 03-Dec-2012
Metadata author:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA National Marine Fisheries Service (NMFS)
NOAA IRC
Honolulu, HI 96818
USA

808 725-5360 (voice)
nmfs.pic.credinfo@noaa.gov

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


Generated by mp version 2.9.13 on Thu Oct 23 10:42:27 2014