NOAA ESRI Grid - 10m Bathymetric Rugosity around Bajo de Cico, Puerto Rico, Project NF-07-06, 2007, UTM 19 NAD 83

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Frequently anticipated questions:


What does this data set describe?

Title:
NOAA ESRI Grid - 10m Bathymetric Rugosity around Bajo de Cico, Puerto Rico, Project NF-07-06, 2007, UTM 19 NAD 83
Abstract:
This dataset contains an ESRI Grid representing the rugosity of a 10 m bathymetric grid for selected portions of seafloor around Bajo de Cico in Puerto Rico, derived from data collected in 2007. Rugosity is defined as the ratio of surface area to planar area and is used as a measure of benthic terrain complexity or "roughness". Rugosity values near 1 represent flat, smooth terrain, while higher values reflect increasing rugosity or terrain roughness. For rugosity grid interpretation, it is recommended that the grid be reclassified according to standard deviation divisions.

NOAA's NOS/NCCOS/CCMA Biogeography Team, in collaboration with NOAA vessel Nancy Foster and territory, federal, and private sector partners, acquired multibeam bathymetry data in Puerto Rico from 4/14/07 to 4/24/07. Data was acquired with a hull-mounted Kongsberg Simrad EM 1002 (95 kHz) multibeam echosounder. It was processed by a NOAA contractor using CARIS HIPS software. Data has all correctors applied (attitude, sound velocity) and has been reduced to mean lower low water (MLLW) using final approved tides and zoning from NOAA COOPS. Data is in UTM zone 19 north, datum NAD83. The processed CARIS data was used to generate a CARIS BASE surface based on swath angle. An ASCII XYZ file was exported from the BASE surface and opened in ESRI ArcMap 9.x using the XYZ to raster tool. The Benthic Terrain Modeller (BTM) tool, a collection of ArcGIS terrain visualization tools developed by the Oregon State University (OSU) Department of Geosciences and the National Oceanic and Atmospheric Administration (NOAA) Coastal Services Center, was used to calculate the rugosity of that bathymetric grid. More information on the specific algorithms used can be found in the BTM's documentation.

The project was conducted to meet IHO Order 1 and 2 accuracy standards, dependant on the project area and depth. All users should individually evaluate the suitability of this data according to their own needs and standards.

Supplemental_Information:
Depth datum is mean lower low water, units are meters and encoding method is explicit depth coordinate included with horizontal coordinates. Vertical Coordinate System information may be found in the Data Acquisition and Processing Report (DAPR) for cruise number NF-07-06 at <http://ccma.nos.noaa.gov/products/biogeography/usvi_nps/pdf/NF-07-06_DAPR.pdf>
  1. How should this data set be cited?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 200711, NOAA ESRI Grid - 10m Bathymetric Rugosity around Bajo de Cico, Puerto Rico, Project NF-07-06, 2007, UTM 19 NAD 83: NOAA's National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Silver Spring, MD.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -67.441594
    East_Bounding_Coordinate: -67.376146
    North_Bounding_Coordinate: 18.263454
    South_Bounding_Coordinate: 18.208976

  3. What does it look like?

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

    Beginning_Date: 14-Apr-2007
    Ending_Date: 24-Apr-2007
    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 597 x 687 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: 19
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -69.000000
      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 10.000000
      Ordinates (y-coordinates) are specified to the nearest 10.000000
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  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?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program

    NOAA - NMAO personnel and R/V NANCY FOSTER

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

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
    Project Manager - Puerto Rico
    1305 East West Highway, SSMC4
    Silver Spring, MD 20910
    USA

    (301) 713-3028 (voice)
    (301) 713-4388 (FAX)

    Contact_Instructions:
    Contact info is for CCMA general reception. Please ask for current Biogeography project manager for Puerto Rico.


Why was the data set created?

This multibeam data was collected as IOCM (Integrated Ocean and Coastal Mapping) project NF-07-06 during the fourth year of an ongoing NOAA scientific research mission in the US Caribbean to characterize nearshore to deep water coral reef habitats at depths down to 1,000 meters. The mission purpose is to better understand the resources within the surveyed reef habitats, and ultimately develop species utilization models linking physical habitats with biological information. The multibeam backscatter, multibeam bathymetry, and ground truth video footage collected during the 2007 mission will be used internally to characterize sea floor topography and to create benthic habitat maps, helping NOAA meet its mapping commitment to the US Coral Reef Task Force. The resulting publicly-distributed data is also a contribution to the greater scientific community interested in the US Caribbean seafloor.


How was the data set created?

  1. From what previous works were the data drawn?

    NF-07-06 Raw Multibeam Data (source 1 of 5)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 2007, NF-07-06 Raw Multibeam Data.

    Type_of_Source_Media: external hard drive
    Source_Contribution: Original raw full resolution dataset.

    NF-07-06 HDCS Processed Multibeam Data (source 2 of 5)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, Unpublished Material, NF-07-06 HDCS Processed Multibeam Data.

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Processed, cleaned, and corrected full resolution dataset. Sourced from raw ALL data.

    NF-07-06 BASE Surface (source 3 of 5)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, Unpublished Material, NF-07-06 CARIS BASE Surface.

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Downsampled CARIS BASE (Bathymetry Associated with Statistical Error) grid with best depth layer. Sourced from processed HDCS data.

    NF-07-06 HDCS ASCII XYZ Multibeam Data (source 4 of 5)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 200711, NOAA ESRI Grid File- Multibeam Bathymetry - Puerto Rico, Project NF-07-06 (2007)..

    Online Links:

    Type_of_Source_Media: external hard drive
    Source_Contribution:
    Downsampled ASCII text file containing XYZ values. XYZ = northing, easting, and depth in meters. Sourced from CARIS BASE surface.

    NF-07-06 HDCS ESRI Grid Multibeam Bathymetry (source 5 of 5)
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 200711, NOAA ESRI Grid- Multibeam Bathymetry, Puerto Rico, Project NF-07-06.

    Online Links:

    Type_of_Source_Media: external hard drive
    Source_Contribution: Gridded bathymetry.

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

    Date: 2007 (process 1 of 5)
    or this project, the Chief Scientist was NOAA/NOS/NCCOS/CCMA's Tim Battista and the Lead Hydrographer was independent contractor Mike L. Stecher. Data was collected aboard the NOAA ship Nancy Foster from 4/14/2007 and 4/24/2007. Multibeam data for 2007 were acquired in .all format with a hull-mounted Kongsberg Simrad 1002 ER multibeam echosounder (95 kHz). Backscatter snippet collection was enabled. Line spacing for acquisition was 3.5 times the water depth, and data was retained out to 55 degrees from nadir, depending on project area. Heave, roll, pitch and heading correctors were collected using an Applanix POS/MV Model 320 V4 inertial measurement unit (IMU) and associated Trimble GPS antennas. Sound velocity profiles were acquired with a Seabird Electronics SBE-911 and SBE-19 CTD profiler and processed using NOAA's Velocwin V8.85 software and converted to Simrad and CARIS format, then applied directly to the raw Simrad data. Positioning was obtained using Trimble Zephyr GPS receivers with differential correctors from U.S. Coast Guard CORS beacon Isabel, Puerto Rico. Data was reduced to Mean Lower-Low Water (MLLW) using final approved tides from NOAA COOPS, based on National Water Level Observation Network (NWLON).

    Data sources used in this process:

    • NF-07-06 HDCS Multibeam Data

    Date: 2007 (process 2 of 5)
    Raw Simrad (.all format) were converted and processed using CARIS HIPS v5.4 and v6.0 software, resulting in a CARIS HDCS format dataset with all correctors applied. Attitude and SWMB data was cleaned of fliers, and SWMB data was reviewed in subset mode by a NOAA contractor.

    Data sources used in this process:

    • NF-07-06 HDCS Multibeam Data

    Date: 2007 (process 3 of 5)
    After being submitted to CCMA by the contractor, CARIS HIPS v5.4 and v6.0 were used to generate a CARIS BASE surface (similar to a DTM), based on weighted swath angle, from the processed HDCS data. Then CARIS export tool "BASE Surface to ASCII" was used to export a comma delimited ASCII XYZ file, with Easting, Northing, and Depth values, using ground position units (NAD83 UTM zone 19N).

    Data sources used in this process:

    • NF-07-06 HDCS BASE Surface

    Date: 2007 (process 4 of 5)
    The ASCII XYZ file was opened in ArcMap 9.x and the 'Display XY Data' option was used to add the XY data as an event with spatial reference NAD83 UTM zone 19N. Finally, the ArcToolbox 9.x conversion tool "Feature to Raster" was then used to convert the XY event into an ESRI Grid, based on the depth field Z. These steps were accomplished using an inhouse Arc script which combined these functions and allowed bulk processing.

    Data sources used in this process:

    • NF-07-06 HDCS ASCII XYZ Multibeam Data

    Date: 2007 (process 5 of 5)
    An ESRI grid of source bathymetry was input into the Rugosity Builder Tool, a component of the ArcGIS Benthic Terrain Modeller (BTM). The BTM tool, a collection of ArcGIS terrain visualization tools developed by the Oregon State University (OSU) Department of Geosciences and the National Oceanic and Atmospheric Administration (NOAA) Coastal Services Center, calculated the rugosity of that bathymetric grid based on an algorithm developed by Jeff Jenness. A short summary of the process, quoted directly from the BTM's documentation, is as follows:

    "...rugosity derivation relies, in part, on a neighborhood analysis using a 3 grid cell by 3 grid cell neighborhood. An algorithm is passed through the Raster Map Algebra Operation object within Spatial Analyst that calculates the planar distance between the center point of the center cell and of each of the eight surrounding cells in the neighborhood. Next, using the Pythagorean Theorem, the surface distance is calculated for each planar distance using the difference in elevation between the cells. The result of this function is sixteen separate grid data sets with each cell value equal to this surface distance. The next step in the process is to calculate the area formed by three adjacent sides. The result is eight triangular surface area grids. These grid datasets are combined to obtain a surface area data set for the input bathymetric data set. The final step in the process is to create a data set that represents the ratio of surface area to planar area. This final data set represents rugosity for the study area."

    More information on the specific algorithms used, and contact points for questions, can be found in the BTM's documentation.

    Rugosity values near 1 represent flat smooth terrain, while higher values reflect increasing rugosity or terrain roughness. For rugosity grid interpretation, is recommended that the grid be reclassified according to standard deviation divisions.

    Data sources used in this process:

    • NF-07-06 HDCS ESRI Grid Multibeam Bathymetry

  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?

    See Data Acquisition and Processing Report (DAPR) for NF-07-06.

  3. How accurate are the heights or depths?

    See Data Acquisition and Processing Report (DAPR) for NF-07-06.

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

    This ESRI Grid is sourced from a gridded dataset. The original full-resolution multibeam data was used to create a downsampled uniform-resolution CARIS BASE (Bathymetry Associated with Statistical Error) surface grid with a best depth component. The downsampled grid nodes from that depth surface were then exported and used to generate the ESRI Grid. Some positional shifts may have occurred between the original data points and the transformed grid.

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

    While the project was conducted to meet IHO Order 1 and 2 accuracy standards, dependant on project area and depth, all users should independently analyze the dataset according to their own needs and standards to determine data usability.


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:
Note: NOT TO BE USED FOR NAVIGATION.

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 in this report, 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 of authors 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.

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

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
    Project Manager - US Caribbean Seafloor Characterization
    1305 East West Highway, SSMC4
    Silver Spring, MD 20910
    USA

    (301) 713-3028 (voice)
    (301) 713-4388 (FAX)

    Contact_Instructions:
    Contact info is for CCMA general reception. Please ask for current Biogeography project manager for US Caribbean.
  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 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 in this report, 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 of authors 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.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 18-Sep-2014
Last Reviewed: 02-Jan-2009
Metadata author:
NOAA/NOS/NCCOS/CCMA Biogeography
Attn: Project Manager
1305 East West Highway, SSMC4
Silver Spring, MD 20910
USA

(301) 713-3028 (voice)

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)


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