H11044N_OUTLINE: Outline of the Interpolated Bathymetry Produced From Data Collected In The Northern Part Of National Oceanic and Atmospheric Administration (NOAA) Survey H11044 (Geographic)

Metadata also available as Outline | Text

Frequently-anticipated questions:

What does this data set describe?

Title:
H11044N_OUTLINE: Outline of the Interpolated Bathymetry Produced From Data Collected In The Northern Part Of National Oceanic and Atmospheric Administration (NOAA) Survey H11044 (Geographic)
Abstract:
During 2001 the NOAA Ship RUDE completed charting survey H11044 that covered a roughly 293 km2 area of the sea floor in north-central Long Island Sound, off Milford Connecticut. Although 100 percent coverage was achieved with sidescan sonar for charting purposes, only reconnaissance (spaced line) bathymetry was acquired with shallow-water multibeam and single-beam systems. Therefore, further processing was conducted at the USGS's Woods Hole Science Center to provide bathymetric datasets with more continuous coverage. This project produced grids and GeoTIFF imagery of the combined and interpolated shallow-water multibeam and single-beam bathymetry generated from the northern part of this data set. Anthropogenic wastes, toxic chemicals, and changes in land-use patterns resulting from residential, commercial, and recreational development have stressed the environment of the Sound, causing degradation and potential loss of benthic habitats. Detailed maps of the sea floor are needed to help evaluate the extent of adverse impacts and to help manage resources wisely in the future. Therefore, in a continuing effort to better understand Long Island Sound, we have interpolated and gridded shallow-water multibeam and single-beam bathymetric data within specific areas of special interest.
  1. How should this data set be cited?

    U.S. Geological Survey, 2008, H11044N_OUTLINE: Outline of the Interpolated Bathymetry Produced From Data Collected In The Northern Part Of National Oceanic and Atmospheric Administration (NOAA) Survey H11044 (Geographic): Open-File Report 2008-1146, 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., McMullen, K.Y., Schattgen, P.T., Schaer, J.D., and Doran, E.F., 2008, Interpolation of Reconnaissance Multibeam and Single-Beam Bathymetry Offshore of Milford, Connecticut: Open-File Report 2008-1146, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole 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: -73.128867
    East_Bounding_Coordinate: -72.937163
    North_Bounding_Coordinate: 41.246090
    South_Bounding_Coordinate: 41.127943

  3. What does it look like?

    <http://pubs.usgs.gov/of/2008/1146/data/basemaps/outline/h11044n_outline.gif> (GIF)
    Thumbnail image showing the outline of interpolated bathymetry produced from data collected in the northern part of NOAA survey H11044

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

    Calendar_Date: 2008
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (1)

    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 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_84.
      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?

    h11044n_outline
    Shapefile of an outline of the interpolated bathymetry of the northern part of NOAA survey H11044 (Source: Scientist)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ID
    Attribute automatically generated when shapefile was created. (Source: Scientist)

    Entity_and_Attribute_Overview:
    An outline of the interpolated bathymetry of the northern part of NOAA survey H11044 in geographic.

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

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

Why was the data set created?

To release an outline of the interpolated bathymetry produced from data collected in the northern part of NOAA survey H11044 off Milford, Connecticut, in a Geographic Coordinate System.

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 acoustic data acquired during NOAA survey H11044 aboard the NOAA ship Rude.

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

    Date: 2008 (process 1 of 2)
    The geographic GeoTIFF of the 10-m interpolated bathymetry from the northern part of NOAA survey H11044 were imported into the ArcView 3.3 GIS project view. These acoustic data were outlined using the available graphic tools then converted to an ArcView 3.3 polygon shapefile.

    Person who carried out this activity:

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

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

    Data sources used in this process:
    • h11044n_mb10_geo.tif

    Data sources produced in this process:

    • h11044n_outline.shp
    • h11044n_outline.shx
    • h11044n_outline.dbf

    Date: 2008 (process 2 of 2)
    ArcGIS 9.2 was used to define the projection of the ESRI shapefile and to create the .prj file.

    Person who carried out this activity:

    Larry Poppe
    U.S. Gelolgical Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • h11077outline.shp

    Data sources produced in this process:

    • h11077outline.prj

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

    Poppe, L.J., Ackerman, S.D., Doran, E.F., Beaver, A.L., Crocker, J.M., and Schattgen, P.T., 2006, Interpolation of Reconnaissance Bathymetry from North-Central Long Island Sound: Open-File Report 2005-1145, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

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?

    Outline shows extent of a bathymetric dataset that was navigated by differential GPS

  3. How accurate are the heights or depths?

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

    This data layer shows the extent and location of the northern part of the area surveyed during NOAA cruise H11044

  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:
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the originator of this information.

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

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

    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 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.

    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) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.

Who wrote the metadata?

Dates:
Last modified: 30-Sep-2008
Metadata author:
U.S. Geological Survey
c/o Larry Poppe
Geologist
384 Woods Hole Road
Woods Hole, MA 02543-1598

508-548-8700 x2314 (voice)
508-457-2310 (FAX)

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

Generated by mp version 2.8.6 on Tue Sep 30 11:23:57 2008