2010_015_997PHOTOGRAPHS.TXT: SEABOSS Images from Cruise 2010-015-FA in JPEG Format

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Frequently-anticipated questions:

What does this data set describe?

Title:
2010_015_997PHOTOGRAPHS.TXT: SEABOSS Images from Cruise 2010-015-FA in JPEG Format
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 and sidescan-sonar imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities in Long Island Sound, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. During October 2008 NOAA completed hydrographic survey H11997 offshore in eastern Long Island Sound, and during May 2010 bottom photographs and surficial sediment data were acquired as part of a ground-truth reconnaissance survey of this area. Two interpretive data layers were derived from the multibeam echo-sounder and the ground-truth data used to verify them. For more information on the ground-truth survey see <http://quashnet.er.usgs.gov/data/2010/10015/>
  1. How should this data set be cited?

    Poppe, L.J., 2011, 2010_015_997PHOTOGRAPHS.TXT: SEABOSS Images from Cruise 2010-015-FA in JPEG Format: Open-File Report 2010-1150, 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., Blackwood, D.S., Schaer, J.D., Forrest, M.R., Ostapenko, A.J., and Doran, E.F., 2011, Sea-Floor Geology and Topography Offshore in Eastern Long Island Sound: Open-File Report 2010-1150, 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: -72.392933
    East_Bounding_Coordinate: -72.150029
    North_Bounding_Coordinate: 41.241927
    South_Bounding_Coordinate: 41.149420

  3. What does it look like?

    <https://pubs.usgs.gov/of/2010/1150/data/botphotos/2010_015_997photographs.gif> (GIF)
    Thumbnail image showing location and extent of bottom photo locations offshore in eastern Long Island Sound

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

    Beginning_Date: 24-May-2010
    Ending_Date: 27-May-2010
    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.

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?


    Entity_and_Attribute_Overview:
    Mid-res (75) and high-res (70) SEABOSS bottom photographs and frame grabs from the cruise 2010-015-FA in JPEG format. The five frame grabs from stations 997-4, 997-7, and 997-21 are provided in mid-res, but not high resolution versions. Frame grabs have "fg" inserted into their file names (e.g., 997-4a_fgmr.jpg) to differentiate them from the still photographs.

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?

    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

Why was the data set created?

The purpose of this dataset is to release the mid-resolution and full-resolution JPEG images of photographs and frame grabs of video of the sea floor acquired offshore in eastern Long Island Sound, with a mid-sized SEABOSS system during USGS survey 2010-015-FA conducted aboard the OSV Bold during May 24-28, 2010. These photographs can be used to provide information on surface geology, sedimentary processes, and habitats.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Source_Contribution:
    The mid-sized SEABOSS was designed and built at the USGS Woods Hole Science Center. This system is equipped with two video cameras, a still camera, and a van Veen grab sampler. This system, weighing approximately 185 lbs, can be used to depths up to 40 meters. The multi-conductor electrical cable is manually deployed. The system also has a 50 Watt/second flash unit powered by 8 AA batteries. Two battery-powered lasers are set 15 cm apart for scale measurements. The red laser dots can usually be seen in the video depending on the bottom type and the distance to the sea floor. A third battery powered laser is positioned at an angle so that when it intersects the other lasers, the mid-sized SEABOSS is at the optimum height off the bottom for a still photograph. The camera is set to a manual focus and set to a default focus distance once the camera is powered up. The default focus distance is slightly less than the optimum height above the seafloor to account for optical distortion under water.

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

    Date: 2010 (process 1 of 5)
    The USGS mid-sized SEABOSS system was deployed to capture still photos and bottom video offshore in eastern Long Island Sound. This system was used to obtain video and 1 to 4 images at each station as the OSV Bold drifted over the seabed for 2 to 5 minutes. The video was collected with a Kongsberg Simrad model OE1365 video camera. The third laser on the system was set to an angle such that the optimum photograph height was 50 cm. The default focus on the camera was set to 50 cm. The imaged area is most often within .3 to 1 meter from left to right. Other camera settings are as follows: aperture is set at f/8; shutter speed is 1/250 second. A total of 70 acceptable still photographs of the sea floor, which were recorded on 35-mm film, were acquired at 25 stations within the study area with a Photosea 1000 stills camera. Although the images themselves have no georeferencing information, the navigation related to each photograph is available in an ESRI formatted shapefile: 2010_015_997botphotos.shp. This data can be downloaded from the following locations: <https://pubs.usgs.gov/of/2010/1150/data/botphotos/2010_015_997botphotos.zip>; <https://pubs.usgs.gov/of/2010/1150/html/catalog.html>

    Person who carried out this activity:

    Dann Blackwood
    U.S. Geological Survey
    Photographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2227 (voice)
    (508) 457-2310 (FAX)
    dblackwood@usgs.gov

    Date: 2010 (process 2 of 5)
    Back ashore, the rolls of 35-mm film taken on the cruise within the study area were commercially developed and scanned to produce the digital images.

    Person who carried out this activity:

    Dann Blackwood
    U.S. Geological Survey
    Photographer
    384 Woods Hole Road
    Woods Hole, MA 02643

    508-548-8700 x2227 (voice)
    508-457-2310 (FAX)
    dblackwood@usgs.gov

    Date: 2010 (process 3 of 5)
    The original JPEG images were renamed from a sequential roll/shot filename to a filename reflecting station location. This was done for each individual file in Windows Explorer.

    Person who carried out this activity:

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02536
    USA

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

    Date: 2010 (process 4 of 5)
    Frame grabs of the 8-mm bottom video were taken using SnapzProX to acquire images of the sea floor at three stations where acceptable still photographs of the sea floor had not been collected (stations 997-4, 997-7, and 997-21). Frame grabs have "fg" inserted into their file names (e.g., 997-4a_fgmr.jpg) to differentiate them from the still photographs.

    Person who carried out this activity:

    Dann Blackwood
    U.S. Geological Survey
    Photographer
    384 Woods Hole Road
    Woods Hole, MA 02543

    508-548-8700 x2227 (voice)
    508-457-2310 (FAX)
    dblackwood@usgs.gov

    Date: 2010 (process 5 of 5)
    The full-resolution JPEG images (2560x1920 pixels) were downsampled using Photoshop CS to create JPEG images with 600 x 450 pixels. The filenames indicate the resolution. For instance, the full-resolution JPEG image - 997-8a_fr.jpg - was downsampled to produce mid-resolution JPEG image 997-8a_mr.jpg.

    Person who carried out this activity:

    Dann Blackwood
    U.S. Geological Survey
    Photographer
    384 Woods Hole Road
    Woods Hole, MA 02543

    508-548-8700 x2227 (voice)
    508-457-2310 (FAX)
    dblackwood@usgs.gov

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

    Blackwood, D.S., and Parolski, K.F., 2001, Seabed observation and sampling system: Sea Technology February 2001, v. 44, no. 2, Sea Technology.

    Valentine, P.C., Blackwood, D.S., and Parolski, K.F., 2002, Seabed observation and sampling system: Fact Sheet 136-01, 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?

  3. How accurate are the heights or depths?

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

    All images of the sea floor collected within the study area offshore in eastern Long Island Sound, on cruise 2010-015-FA with the mid-sized SEABOSS system are included. Total station numbers range from 997-1 to 997-28. Frame grabs of video are supplied with the mid-res dataset; not all of the photos collected on the cruise were collected within the study area.

  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 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)

    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

  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 the Connecticut Department of Environmental Protection (CT DEP) 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, NOAA, or the CT DEP 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 as JPEG images. To utilize these data, the user must have an image viewer capable of opening JPEG images. The full-resolution images are 2560x1920 pixels; the medium resolution images are 600x450 pixels. Although a WinZip file of the full-resolution images is provided, it is large and individuals may want to download the images individually.

Who wrote the metadata?

Dates:
Last modified: 19-Oct-2010
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 2.9.6 on Tue Oct 19 13:46:36 2010