H11079_GEO_GSHS.TIF: Grayscale Shaded-Relief GeoTIFF Image Showing the 3-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H11079 in Great Round Shoal Channel, Offshore Massachusetts (Geographic)

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Frequently-anticipated questions:

What does this data set describe?

Title:
H11079_GEO_GSHS.TIF: Grayscale Shaded-Relief GeoTIFF Image Showing the 3-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H11079 in Great Round Shoal Channel, Offshore Massachusetts (Geographic)
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provide a fundamental framework for research and management activities along this part of the Massachusetts coastline, show the composition and terrain of the seabed, and provide information on sediment transport and benthic habitat. Interpretive data layers were derived from multibeam echo-sounder and sidescan sonar data collected in Great Round Shoal Channel, a passage through the shoals at the eastern entrance to Nantucket Sound, off Cape Cod, Massachusetts. In June 2006, bottom photographs and surficial sediment data were acquired as part of a ground-truth reconaissance survey.
  1. How should this data set be cited?

    U.S. Geological Survey, 2007, H11079_GEO_GSHS.TIF: Grayscale Shaded-Relief GeoTIFF Image Showing the 3-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H11079 in Great Round Shoal Channel, Offshore Massachusetts (Geographic): Open-File Report 2007-1138, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    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 Science Center, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -70.023078
    East_Bounding_Coordinate: -69.832400
    North_Bounding_Coordinate: 41.450230
    South_Bounding_Coordinate: 41.401765

  3. What does it look like?

    <http://pubs.usgs.gov/of/2007/1138/data/bathy/geotifs/geograyscale/h11079_geo_gshs.gif> (GIF)
    Overview image showing the location and extent of the grayscale GeoTIFF image produced from multibeam data collected during NOAA survey H11079

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

    Calendar_Date: 2007
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: remote-sensing image

  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 1797 x 7070 x 1, type Pixel

    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 .000001. Longitudes are given to the nearest .000001. Latitude and longitude values are specified in Decimal degrees.

      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:
      Altitude_System_Definition:
      Depth_System_Definition:

  7. How does the data set describe geographic features?

    h11079_geo_gshs.tif

    ObjectID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Value


    Count


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 Lawrence 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 hill-shaded grayscale GeoTIFF image of the 3-m bathymetry generated from NOAA survey H11079 in Great Round Shoal Channel, offshore Massachusetts in geographic.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    .

    Type_of_Source_Media: DVD-ROM
    Source_Contribution:
    The original multibeam bathymetric data acquired with a Reson 8125 and 8101 echosounder systems during NOAA survey H11079 aboard the NOAA ship Thomas Jefferson.

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

    Date: 2004 (process 1 of 6)
    The multibeam data was acquired in XTF (extended Triton data format), recorded digitally through an ISIS data acquisition system, and processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce a base surface at 3-m resolution. The data were exported in text (.txt) format in UTM Zone 19.

    Person who carried out this activity:

    Marc Moser
    National Oceanic and Atmospheric Administration
    Field Operations Officer
    439 West York Street
    Norfolk, VA 23510
    USA

    (757) 441-6746 (voice)
    marc.s.moser@noaa.gov

    Data sources produced in this process:
    • h11079_3mutm19_xyz.txt

    Date: 2006 (process 2 of 6)
    The gridded text file was imported into Fledermaus and converted to a .dtm file. The .dtm file was exported from Fledermaus as an ESRI ASCII grid file.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • h11079_3mutm19_xyz.txt

    Data sources produced in this process:

    • h11079_3m.dtm
    • h11079_utm19_3m_av.asc

    Date: 2006 (process 3 of 6)
    The ESRI ASCII grid file was converted into a raster dataset using the ArcGIS Toolbox ASCtoRaster tool, and saved as a UTM zone 19 bathymetric grid.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • h11079_utm19_3m_av.asc

    Data sources produced in this process:

    • h11079_utm_b

    Date: 2006 (process 4 of 6)
    A hill-shaded surface was generated from the grid with sun illumination from 315 degrees and an angle 45 degrees above the horizon, and to vertically exaggerate the surface 5x.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • h11079_utm_b

    Data sources produced in this process:

    • h11079_utm_hs

    Date: 2006 (process 5 of 6)
    The UTM Zone 19 hill-shaded grid was reprojected into geographic, WGS84, in ArcCatalog.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • h11079_utm_hs

    Data sources produced in this process:

    • h11079_geo_hs

    Date: 2007 (process 6 of 6)
    ArcView 3.3 extension grid2image (Image Conversion-Georeferencing) was used to create the grayscale GeoTIFF image.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    GIS Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources used in this process:
    • h11079_geo_hs

    Data sources produced in this process:

    • h11079_geo_gshs.tif
    • h11079_geo_gshs.tfw

  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?

    Navigation was by differential GPS

  3. How accurate are the heights or depths?

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

    All collected data were processed and used to produce this dataset.

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

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 U.S. Geological Survey (USGS) as the source 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?

    Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS 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 the USGS 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?

    These data are available in Environmental Systems Research Institute (ESRI) Raster GRID format. The user must have software capable of importing and processing the data files.

Who wrote the metadata?

Dates:
Last modified: 25-Jul-2007
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 2.8.6 on Wed Jul 25 08:27:18 2007