Locations of seafloor photographs, San Pedro shelf, southern California - PHOTOPT.SHP

Frequently anticipated questions:

What does this data set describe?

Title:
Locations of seafloor photographs, San Pedro shelf, southern California - PHOTOPT.SHP
Abstract:
Photopt.shp is a GIS file of locations where seafloor photographs were collected by the U.S. Geological Survey during September 2004 during survey O-1-04-SC.
This data set is one of a collection of digital files of a geographic information system (GIS) of spatially referenced data related to the study of seafloor geology and benthic habitats of the San Pedro shelf off southern California.
The San Pedro shelf study area covers approximately 400 sq km offshore of the metropolitan Los Angeles area out to a water depth of about 150 m (492 ft). The seafloor hosts a rich and varied biologic community and is subject to anthropogenic inputs from shipping traffic, sewage outfall systems, commercial fisheries, and recreational use. Between 1998 and 2004, the U.S. Geological Survey (in cooperation with Los Angeles and Orange County Sanitation Districts) mapped the seafloor with sonar technologies, collected video and still photography, and collected sediment samples to develop a characterization of this shelf area.
Supplemental_Information:
Additional information about the field activities from which this data set was derived are available online at 
 <http://walrus.wr.usgs.gov/infobank/o/o104sc/html/o-1-04-sc.meta.html>
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
  1. How should this data set be cited?

    Phillips, Eleyne L. , and Wong, Florence L. , 2012, Locations of seafloor photographs, San Pedro shelf, southern California - PHOTOPT.SHP: U.S. Geological Survey Data Series 552, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

    • <https://pubs.usgs.gov/ds/552/>

    This is part of the following larger work.

    Wong, Florence L. , Edwards, Brian D. , Dartnell, Peter, and Phillips, Eleyne L. , 2012, Seafloor Geology and Benthic Habitats of the San Pedro shelf, southern California: U.S. Geological Survey Digital Series 552, U.S. Geological Survey, Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -118.338133
    East_Bounding_Coordinate: -117.949982
    North_Bounding_Coordinate: 33.715607
    South_Bounding_Coordinate: 33.562234

  3. What does it look like?

    photopt.gif (JPEG)
    map of photo locations

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

    Calendar_Date: 2004
    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 (183)

    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_1984.
      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?

    photopt
    location of seafloor photos (Source: this sutdy)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    IMAGEID
    photo identification label (Source: this study)

    photo labels

    LONGITUDE
    longitude (Source: standard use)

    Range of values
    Minimum:-180
    Maximum:180

    LATITUDE
    latitude (Source: standard use)

    Range of values
    Minimum:-90
    Maximum:90

    THUMBNAIL
    path to thumbnail image (Source: this study)

    path to thumbnail image

    IMAGE_URL
    link to location of full size image (Source: this study)

    link to location of full size image

    label
    filename before first underscore; camera reel number (Source: this study)

    first part of image file name

    lblflag
    flag for plotting camera reel number in attribute LABEL (Source: this study)

    ValueDefinition
    1yes
    0no

    caption
    brief description of image (Source: this study)

    image description

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
    Attn: Florence L. Wong
    345 Middlefield Road Mail Stop 999
    Menlo Park, CA 94025
    USA

    650-329-5327 (voice)
    fwong@usgs.gov

Why was the data set created?

These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.

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: 01-Jun-2010 (process 1 of 4)
    Metadata imported.

    Data sources used in this process:

    • d:\TEMP\xmlF7.tmp

    Date: 01-Jun-2010 (process 2 of 4)
    Metadata imported.

    Data sources used in this process:

    • d:\TEMP\xmlFE.tmp

    Date: 01-Jun-2010 (process 3 of 4)
    Metadata imported.

    Data sources used in this process:

    • d:\TEMP\xml144.tmp

    Date: 29-Aug-2012 (process 4 of 4)
    Metadata imported.

    Data sources used in this process:

    • d:\temp\xml4E.tmp

  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?

  3. How accurate are the heights or depths?

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

    Complete.

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

    Point features present.

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: None

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

    U.S. Geological Survey
    Attn: Florence L. Wong
    345 Middlefield Road Mail Stop 999
    Menlo Park, CA 94025
    USA

    (650) 329-5327 (voice)
    fwong@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?

    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, 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 U.S. Geological Survey 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: 01-Jun-2010
Last Reviewed: 2010
Metadata author:
U.S. Geological Survey
Attn: Florence L Wong
345 Middlefield Road Mail Stop 999
Menlo Park, CA 94025
USA

650-329-5327 (voice)
fwong@usgs.gov

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

Generated by mp version 2.9.15 on Wed Aug 29 12:38:28 2012