Point Shapefile indicating John Day Reservoir bottom photographs locations - 2000

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Frequently anticipated questions:

What does this data set describe?

Title:
Point Shapefile indicating John Day Reservoir bottom photographs locations - 2000
Abstract:
A two-week field operation was conducted in the John Day Reservoir on the Columbia River to image the floor of the pool, to measure the distribution and thickness of post-impoundment sediment, and to verify these geophysical data with video photography and bottom sediment samples. The field program was a cooperative effort between the USGS Coastal and Marine Geology Team of the Geologic Division and the USGS Columbia River Research Laboratory of the Biological Resources Division. The data collection was completed aboard the R/V ESTERO during September 13-27, 2000. The interest in sediment accumulation in the reservoir was two-fold. First, it was unknown how effective this reservoir was as a sediment trap to material that otherwise would have been transported down-river to the estuary and eventually to the ocean. The recent erosion of beaches along the Washington coast has been attributed to a decreased contribution of sediment from the Columbia River to the coastal system due to the damming of the river. Second, sediment accumulation on the floors of reservoirs along the Columbia River has been suggested to be diminishing salmon spawning grounds. The extent of changes in habitat since construction of the John Day Dam, however, had not been documented. Common data sets were needed to address both of these questions, and for these reasons this geophysical and sampling program was undertaken.
Supplemental_Information:
For more information about the field activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2000-030-FA.
  1. How might this data set be cited?
    Twichell, David. C., and Cross, VeeAnn A., 2004, Point Shapefile indicating John Day Reservoir bottom photographs locations - 2000: Open-File Report 2004-1014, 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.

    Cross, VeeAnn A., and Twichell, David C., 2004, Geophysical, Sedimentologic, and Photographic Data from the John Day Reservoir, Washington and Oregon: Data Archive and Preliminary Discussion: Open-File Report 2004-1014, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -120.630400
    East_Bounding_Coordinate: -119.835817
    North_Bounding_Coordinate: 45.844383
    South_Bounding_Coordinate: 45.691083
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 25-Sep-2000
    Ending_Date: 27-Sep-2000
    Currentness_Reference:
    ground condition
  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 (48)
    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 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?
    jd2000
    Information unavailable from original metadata. (Source: Information unavailable from original metadata.)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    SAMPLE_ID
    Identification representing the sample where JD indicated John Day, and the number represents the sample number. (Source: Dave Twichell) character set
    LATITUDE
    Latitude fix for the location of the video image. (Source: Correlated value of the time of the video image with the GPS file.)
    Range of values
    Minimum:45.691083
    Maximum:45.844383
    LONGITUDE
    Longitude fix for the location of the video image. (Source: Correlated value of the time of the video image with the GPS file.)
    Range of values
    Minimum:-120.630400
    Maximum:-119.835817
    DESCRIPTIO
    Description of the video image. (Source: Dave Twichell) character set
    IMAGE
    Prefix portion of the name of the image. (Source: Dave Twichell) character set
    SAMPLE_ACQ
    Indicates whether or not a sediment sample was actually acquired during the deployment of the sampler. (Source: VeeAnn A. Cross) character set
    IMAGE_TIME
    The time (UTC) indicating when the image was grabbed from the video. (Source: Dave Twichell) character set
    HOTLINK
    Path indicating the location of the corresponding bottom photograph hotlinked to this point. This path contains an environment variable specifying the root directory of the project. (Source: Data processor.) character set
    Entity_and_Attribute_Overview:
    There are 2 instances where there is no image_time. In one case (JD01), the raw GPS was not recorded to hard disk, therefore the sample location is what was recorded in the original log book. In another case (JD20), no video was recorded corresponding to the sampler deployment. Although the attempt was made to grab an image from the video close to when the sediment sample was acquired, this was not always possible. Therefore, these locations refer to when/where the image was acquired, not the corresponding grab sample.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • David. C. Twichell
    • VeeAnn A. Cross
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    David C. Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

Why was the data set created?

This shapefile is intended to provide the locations for which bottom photographs of the floor of the John Day Reservoir have been acquired.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: unknown (process 1 of 7)
    A log book was maintained during the sediment sampling portion of the cruise. This logbook contained information about the time that video imagery was being acquired (both in UTC time and VHS time), as well as the time and location fix of when a sampling attempt was made. The complete GPS data was recorded to the hard disk for all but the first sample taken. The video imagery was collected using the USGS SeaBOSS system and recorded to Hi8 8mm tape.
    Date: unknown (process 2 of 7)
    In the lab, the SeaBOSS tapes were played back on a Sony EVS-5000 Hi8 video player and the desired sections were written to DVD using a Pioneer PRV-9000 DVD recorder. Data sources used in this process:
    • Blackwood, D.B., Parolski, K.F., 2001, Seabed observation and sampling system: Sea Technology, February 2001, v. 44, no. 2, p. 39-43.
    Date: unknown (process 3 of 7)
    Once the DVD was finalized, the DVD was played on a Macintosh G4 computer, and individual frames were grabbed by the Snapz Pro X software. The time presented in these images is the time (hours, minutes, seconds) from the start of the video tape (VHS time).
    Date: 06-Dec-2017 (process 4 of 7)
    Edits to the metadata were made to fix any errors that MP v 2.9.36 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.). Added the link to the data catalog page in the Identification section, and a link to the publication in the Larger Work Citation. Added online link to the data in the Distribution section. Added a link to the field activity. The information in the quantitative horizontal accuracy assessment was moved to the horizontal positional accuracy report. 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 Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 5 of 7)
    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 6 of 7)
    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 7 of 7)
    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?

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?
    The navigation system is believed to have an accuracy better than 10m, but because the instrument is towed, this reduces the navigational accuracy. Assumed accruacy is 10 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Information unavailable from original metadata.
  5. How consistent are the relationships among the observations, including topology?
    Information unavailable from original metadata.

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 The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    David C. Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@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?
    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 published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 18-Mar-2024
Metadata author:
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA

(508) 548-8700 x2251 (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 person is no longer with USGS. (updated on 20240318)
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/ofr2004-1014/jd2000meta.faq.html>
Generated by mp version 2.9.51 on Mon Mar 25 16:05:22 2024