Maine Inner Continental Shelf Sediment Data (BARNHARDT shapefile)

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Frequently anticipated questions:

What does this data set describe?

Title:
Maine Inner Continental Shelf Sediment Data (BARNHARDT shapefile)
Abstract:
Surficial geologic maps play and important role in understanding the present sea floor and the processes that shape it. Between 1984 and 1991, over 1,700 bottom sample stations were occupied in the northwestern Gulf of Maine. Although the data were originally collected for a variety of research projects, contracts, and graduate student theses, they were eventually compiled as part of a Maine Geological Survey and University of Maine program to map the inner continental shelf of this region.
  1. How might this data set be cited?
    Poppe, Lawrence J., and Hastings, Mary E., 2003, Maine Inner Continental Shelf Sediment Data (BARNHARDT shapefile): Open-File Report 03-001, 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., Paskevich, V.F., Williams, S.J., Hastings, M.E., Kelley, J.T., Belknap, D.F., Ward, L.G., Fitzgerald, D.M., and Larsen, P.F., 2003, Surficial Sediment Data from the Gulf of Maine, Georges Bank, and vicinity: a GIS Compilation: Open-File Report 03-001, U. S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 CD-ROM
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.812833
    East_Bounding_Coordinate: -67.129700
    North_Bounding_Coordinate: 44.578314
    South_Bounding_Coordinate: 42.833833
  3. What does it look like?
    http://pubs.usgs.gov/of/2003/of03-001/data/seddata/barnhardt/barnhardt-thumb.gif (GIF)
    Thumbnail image showing extent and distribution of data layer coverage.
    http://pubs.usgs.gov/of/2003/of03-001/data/seddata/barnhardt/barnhardt.gif (GIF)
    Image map showing extent and distribution of data layer coverage.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1998
    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):
      • Entity point (1739)
    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 0.00000001. Longitudes are given to the nearest 0.00000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.
  7. How does the data set describe geographic features?
    barnhardt.dbf
    Shapefile Attribute Table (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    SITE
    Unique number assigned to each sample location (Source: Scientist)
    Range of values
    Minimum:1
    Maximum:1902
    Units:stations
    Resolution:1
    SAMPLE
    Name used to identify samples (Source: Scentist) Names of characters and munerics identifying samples
    LATITUDE
    Latitude coordinate of sample location (Source: Scientist)
    Range of values
    Minimum:42.833833
    Maximum:44.578314
    Units:decimal degrees
    Resolution:0.000001
    LONGITUDE
    Longitude coordinate of sample location (Source: Scientist)
    Range of values
    Minimum:-70.812833
    Maximum:-67.129300
    Units:decimal degrees
    Resolution:0.000001
    DEPTH_M
    Water depth in meters (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:211
    Units:meters
    Resolution:1
    C_CODE
    Classification code (Source: Scientist) Abbreviations of lithologic descriptions
    LITHOLOGY
    Lithologic/textural descriptions of the seafloor (Source: Scientist) Lithologic descriptions
    GRAVEL
    Percentage of gravel (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1
    SAND
    Percentage of sand in sample (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1
    SILT
    Percentage of silt in sample (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:74
    Units:percent
    Resolution:1
    CLAY
    Percentage of clay in sample (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:85
    Units:percent
    Resolution:1
    MUD
    Percentage of mud (silt plus clay) in sample (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1
    MEAN_PHI
    Mean of the grain size distribution in phi (Source: Scientist)
    Range of values
    Minimum:-4.9
    Maximum:11.6
    Units:phi
    Resolution:0.1
    STDDEV
    Standard deviation of the grain size distribution in phi units (Source: Scientist)
    Range of values
    Minimum:0
    Maximum:7.6
    Units:phi
    Resolution:0.1
    BAY
    Bay or region where the sample was collected (Source: Scientist) Names of bays and regions along the inner continental shelf

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Lawrence J. Poppe
    • Mary E. Hastings
  2. Who also contributed to the data set?
    Please review the cross reference information for the original data set credit to Kelley and others (1998), and Larry Poppe for creating this ArcView shapefile.
  3. To whom should users address questions about the data?
    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

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

Why was the data set created?

The purpose of this data layer is to make available a subset of a data set produced by the Maine Geological Survey and the University of Maine. This subset contains information for those samples with raw grain size data, and which are located on the inner continental shelf from the northwestern Gulf of Maine.

How was the data set created?

  1. From what previous works were the data drawn?
    Information unavailable from original metadata. (source 1 of 2)
    Kelley, J.T., Barnhardt, W.A., Belknap, D.F., Dickson, S.M., and Kelley, A.R., 1998, The Seafloor Revealed: The Geology of the Northwestern Gulf of Maine Inner Continental Shelf: Maine Geological Survey Open-File 96-6, 55 p., Maine Geological Survey, Department of Conservation, Augusta, ME.

    Type_of_Source_Media: CD-ROM
    Source_Contribution: Information unavailable from original metadata.
    Information unavailable from original metadata. (source 2 of 2)
    Barnhadt, W.A., Kelley, J.T., Dickson, S.M., Belknap, D.F., and Kelley, A.R., 1996, Surficial Geology of the Maine Inner Continental Shelf: Maine Geological Survey Map Series scale 1:100,000, Maine Geological Survey, Augusta, ME.

    Type_of_Source_Media: Information unavailable from original metadata.
    Source_Contribution: Information unavailable from original metadata.
  2. How were the data generated, processed, and modified?
    Date: 29-Oct-2002 (process 1 of 5)
    Textural and lithologic data from the northwestern Gulf of Maine were clipped from the whole Maine Geological Survey and University of Maine dataset from the Surficial Geology of the Maine Inner Continental Shelf map series in Excel and exported to an ASCII file. Stations and sediment data were imported from the ASCII text file to an ArcView table. The table was later converted to an event theme and saved as the final shapefile. Person who carried out this activity:
    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov
    Data sources used in this process:
    • barnhardt.txt
    Data sources produced in this process:
    • barnhardt.shp
    • barnhardt.dbf
    • barnhardt.shx
    Date: 01-Dec-2015 (process 2 of 5)
    Edits to the metadata were made to fix any errors that MP v 2.9.32 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). The source information was incomplete and had to be modified to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 3 of 5)
    USGS Thesaurus keywords added to the keyword section. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 18-Nov-2019 (process 4 of 5)
    Crossref DOI link was added as the first link in the metadata. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 08-Sep-2020 (process 5 of 5)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Kelley, J.T., Barnhardt, W.A., Belknap, D.F., Dickson, S.M., and Kelley, A.R., 1998, The Seafloor Revealed: The Geology of the Northwestern Gulf of Maine Inner Continental Shelf: Maine Geological Survey Open-File 96-6, 55 p., Maine Geological Survey, Department of Conservation, Augusta, ME.

    Barnhardt, W.A., Kelley, J.T., Dickson, S.M., Belknap, D.F., and Kelley, A.R., 1996, Surficial Geology of the Maine Inner Continental Shelf: Maine Geological Survey Map Series scale 1:100,000, Maine Geological Survey, Augusta, ME.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    All attributes were checked by the compilers in a consistent manner.
  2. How accurate are the geographic locations?
    Navigation was variously performed with Loran C (+/- 100 m accuracy) and dfferential GPS (+/- 10 m accuracy). No location-by-location differentiation is made between these navigational systems.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Locations, grain-size data, textural classifications, and identifiers are provided for 1,739 samples.
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for topological 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:
Public domain data from the U.S. Government 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)
    Lawrence J. Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    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 these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. 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?
    • Availability in digital form:
      Data format: Five files (barnhardt.shp, barnhardt.dbf, barnhardt.shx, barnhardt.sbx, barnhardt.sbn) comprising the ArcView point shapefile components, 'prj' and 'avl' files, metadata text file and browse graphic. in format SHP (version 3.2) ESRI point shapefile Size: 0.047
      Network links: http://pubs.usgs.gov/of/2003/of03-001/data/seddata/barnhardt/barnhardt.zip
      Media you can order: CD-ROM (Density 650 Mbytes) (format ISO 9600)
      Note: The user must have a computer system with a CD-ROM available. To browse the information contained on this CD-ROM, the user must have a current WWW browser available. The user must also have software installed on their computer to unzip the archived file.
    • Cost to order the data: None

  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 the 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: 16-Nov-2021
Metadata author:
Lawrence J. Poppe
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x2314 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2003-001/barnhardt.shp.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:29 2021