H12007_UTM: 1-m Bathymetric Grid Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12007 in the Vicinity of Cross Rip Channel, Nantucket Sound (UTM Zone 19, NAD83)

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Frequently-anticipated questions:


What does this data set describe?

Title:
H12007_UTM: 1-m Bathymetric Grid Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12007 in the Vicinity of Cross Rip Channel, Nantucket Sound (UTM Zone 19, NAD83)
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA), is producing detailed geologic maps of the coastal sea floor. Bathymetry, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities off southern New England, shows the character and terrain of the seabed, and provides information on sediment transport and benthic habitat. During April-May 2009 NOAA completed hydrographic survey H12007 in the vicinity of Cross Rip Channel in Nantucket Sound off southern Cape Cod, Massachusetts and during June 2011 bottom photographs and surficial sediment data were acquired as part of ground-truth reconnaissance surveys of this area. Interpretations were derived from the multibeam echo-sounder data and the ground-truth data used to verify them.
  1. How should this data set be cited?

    National Oceanic and Atmospheric Administration, and U.S. Geological Survey, 2012, H12007_UTM: 1-m Bathymetric Grid Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12007 in the Vicinity of Cross Rip Channel, Nantucket Sound (UTM Zone 19, NAD83): Open-File Report 2011-1222, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Schaer, J.D., and Wright, D.B., 2012, Sea-Floor Geology and Sedimentary Processes in the Vicinity of Cross Rip Channel, Nantucket Sound, Offshore Southeastern Massachusetts: Open-File Report 2011-1222, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -70.305859
    East_Bounding_Coordinate: -70.221773
    North_Bounding_Coordinate: 41.464108
    South_Bounding_Coordinate: 41.435931

  3. What does it look like?

    <https://pubs.usgs.gov/of/2011/1222/data/bathy/grids/utm/h12007_utm.gif> (GIF)
    Thumbnail image showing the 1-m gridded multibeam bathymetry collected during NOAA survey H12007 in UTM Zone 19, NAD83

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

    Beginning_Date: 23-Apr-2009
    Ending_Date: 04-May-2009
    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 3027 x 6981 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 1.000000
      Ordinates (y-coordinates) are specified to the nearest 1.000000
      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.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Mean lower low water
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    A 1-m grid of the multibeam bathymetry from NOAA survey H12007 in the UTM Zone 19, NAD83 coordinate system.


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?

    U.S. Geological Survey
    c/o Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov


Why was the data set created?

To release a 1-m grid of the multibeam bathymetry generated during NOAA survey H12007 in the vicinity of Cross Rip Channel in Nantucket Sound, offshore southeastern Massachusetts in UTM Zone 19, NAD83.


How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    National Ocean Survey, National Oceanic and Atmospheric Adminis, Unpublished Material, H12007 bathymetry.

    Type_of_Source_Media: disc
    Source_Contribution: Original processed multibeam bathymetric data.

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

    Date: 2009 (process 1 of 6)
    Two 8.5-m aluminum Jensen launches and the NOAA Ship Thomas Jefferson were used to acquire the multibeam echosounder (MBES) bathymetric data for survey H12007 during April-May 2009 in central Nantucket Sound, offshore southeastern Massachusetts. The MBES data on launch 3101 were collected with a hull-mounted RESON SeaBat 455-kHz 8125 shallow-water system. This system measures two-way sound travel time across a 120-degree swath. The SeaBat 8125 has 240 beams with a cross-track beam width of 0.5 degrees at nadir. The MBES data were collected aboard the ship and launch 3102 with RESON 7125 systems which measured two-way sound travel time across a 140-degree swath. Original horizontal resolution of the MBES data was 0.5 m for depths less than 20 m and 1 m for the deeper areas. Vertical resolution of the MBES data is about 0.5% of the water depth. The bathymetric data were acquired and logged with HYPACK Hysweep and processed by NOAA using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce the continuous digital terrain model. All positioning and attitude were determined with Trimble DSM212L DGPS receivers and Applanix POS/MV Model 320 v.4 inertial navigation systems; HYPACK 2009 was used for acquisition line navigation. Sound velocity corrections were derived using frequent SEACAT CTD (conductivity-temperature-depth) profiles. Typically, a CTD cast was conducted every three to four hours of MBES acquisition. Tidal zone corrections were calculated from the tide station at Nantucket Island, Massachusetts. Vertical datum is mean lower low water. Individuals interested in detail descriptions of the MBES acquisition and processing should consult the descriptive reports. The data were gridded to 1-m resolution and saved as a CARIS HIPS/SIPS v6.1 SP2 database in UTM Zone 19, NAD83.

    Vertical offsets are present in the data, but none exceed the permissible error limits. The sources of these offsets include 1) change and acceleration of current flow in the narrow channel that changed the draft of the survey vessel, 2) shifting of sand waves due to strong currents, 3) a consistent 15-20 cm positive bias in the data from launch 3102, and 4) a faulty RESON 7125 multibeam receiver on the Thomas Jefferson.

    Person who carried out this activity:

    National Oceanic and Atmospheric Administration
    c/o Jasper Schaer
    Field Operations Officer
    439 West York Street
    Norfolk, VA 23510
    USA

    757-441-6746 (voice)
    jasper.schaer@noaa.gov

    Data sources produced in this process:
    • H12007 CARIS HIPS database

    Date: 2011 (process 2 of 6)
    The H12007 CARIS HIPS base surface H12007_1_CUBE_NOAA_1m_Final (fieldsheet H12007_Combined) was opened in CARIS HIPS/SIPS v7.0.2 and exported as a Bathymetry Attributed Grid (.bag) file using the CARIS HIPS Export Wizard.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • H12007 CARIS HIPS database

    Data sources produced in this process:

    • h12007_utm_nad83_1m.bag

    Date: 2011 (process 3 of 6)
    The H12007 .bag file was then imported into the DMagic v7.2 program and converted to a Scientific Data Object (.sd) file.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • h12007_utm_nad83_1m.bag

    Data sources produced in this process:

    • h12007_utm_nad83_1m.sd

    Date: 2011 (process 4 of 6)
    The H12007 Scientific Data Object (.sd) surface was then exported as an ESRI ASCII raster file using the DMagic v7.2 program.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • h12007_utm_nad83_1m.sd

    Data sources produced in this process:

    • h12007_utm_nad83_1m.asc

    Date: 2011 (process 5 of 6)
    The ESRI ASCII raster file was then imported into ArcCatalog v9.3 and converted to an ESRI 32-bit floating point grid using the ASCII to Raster conversion tool (ArcToolbox - Conversion Tools - To Raster - ASCII to Raster).

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • h12007_utm_nad83_1m.asc

    Data sources produced in this process:

    • h12007_utm

    Date: 2011 (process 6 of 6)
    Defined the projection as UTM Zone 19, NAD83 using ArcCatalog v9.3 (ArcToolbox - Data Management Tools - Projections and Transformations - Define Projection).

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • h12007_utm

    Data sources produced in this process:

    • h12007_utm

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

    Schattgen, P. Tod , 2009, H12007: Descriptive Report H12007, National Ocean Survey, National Oceanic and Atmospheric Administration, Atlantic Hydrographic Branch, Norfolk, VA.

    Online Links:

    Poppe, L.J., Ackerman, S.D., Foster, D.S., Blackwood, D.S., Butman, B., Moser, M.S., and Stewart, H.F., 2007, Sea-floor character and surface processes in the vicinity of Quicks Hole, Elizabeth Islands, Massachusetts: Open-File Report 2006-1357, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., Ackerman, S.D., Foster, D.S., Blackwood, D.S., Williams, S.J., Moser, M.S., Stewart, H.F., and Glomb, K.A., 2007, Sea-floor character and sedimentary processes of Great Round Shoal Channel, offshore Massachusetts: Open-File Report 2007-1138, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-floor character and sedimentary processes in the vicinity of Woods Hole, Massachusetts: Open-File Report 2008-1004, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Moser, M.S., and Glomb, K.A., 2010, Geological interpretation of the sea floor offshore of Edgartown, Massachusetts: Open-File Report 2009-1001, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    McMullen, K.Y., Poppe, L.J., Denny, J.F., Haupt, T.A., and Crocker, J.M., 2008, Sidescan-sonar imagery and surficial geologic interpretations of the sea floor in central Rhode Island Sound: Open-File Report 2007-1366, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    McMullen, K.Y., Poppe, L.J., Ackerman, S.D., Blackwood, D.S., Schaer, J.D., Nadeau, M.A., and Wood, D.A., 2011, Surficial geology of the sea floor in central Rhode Island Sound southeast of Point Judith, Rhode Island: Open-File Report 2011-1005, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Blackwood, D.S., Irwin, B.J., Schaer, J.D., and Forrest, M.R., 2011, Sea-floor geology and character of eastern Rhode Island Sound west of Gay Head, Massachusetts: Open-File Report 2011-1004, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM


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?

    Horizontal position of the ship and launches acquiring multibeam bathymetry were determined by differential GPS. Real-time original horizontal resolution of the MBES data was 0.5 m for depths less than 20 m and 1 m for the deeper areas; the final CARIS combined base surface for the MBES data were produced at a 1-m cell size.

  3. How accurate are the heights or depths?

    Attitude of the vessels (e.g. pitch, roll, and heave) acquiring multibeam bathymetry were monitored by Applanix TSS POS/MV 320 Version 3 GPS aided navigation systems. The vertical accuracy of the original bathymetry data is approximately 0.5% of the water depth.

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

    All collected data were processed and used to produce this dataset. Although all data were used, we recognize that vertical offsets are present in the data. None of the offsets exceed the permissible error limits. The sources of these offsets include 1) change and acceleration of current flow in the narrow channel that changed the draft of the survey vessel, 2) shifting of sand waves due to strong currents, 3) a consistent 15-20 cm positive bias in the data from launch 3102, and 4) a faulty RESON 7125 multibeam receiver on the Thomas Jefferson.

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

    No additional checks for consistency were performed on this data.


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:
Data are not to be used for navigation purposes.

Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration (NOAA) and U.S. Geological Survey (USGS) as the originators of this information.

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

    U.S. Geological Survey
    c/o Larry Poppe
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS or NOAA in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    The user must have a program capable of reading the ESRI grid data format. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. The directory structure as it appears in the WinZip file must be maintained or else the binary grid is unusable.


Who wrote the metadata?

Dates:
Last modified: 04-Oct-2011
Metadata author:
Larry Poppe
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2314 (voice)
(508) 457-2310 (FAX)
lpoppe@usgs.gov

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


Generated by mp version 2.8.25 on Tue Oct 04 14:23:42 2011