Contours -- Point San Luis map area [sheet 5]

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Frequently anticipated questions:

What does this data set describe?

Title: Contours -- Point San Luis map area [sheet 5]
Abstract:
This part of SIM 3327 presents data for bathymetric contours on the offshore geologic and geomorphic map of the Point San Luis map area, in the vicinity of Pismo Beach, California. The vector data file "Contours_PointSanLuis.zip," which is accessible from <https://pubs.usgs.gov/sim/3327/data/sim3327_data_catalog.html>.
The bathymetric contours for the Point Piedras Blancas to Pismo Beach area in central California were generated from bathymetry data collected by California State University, Monterey Bay (CSUMB) between 2007 and 2010, with additional bathymetry from the 1/3 arc second NOAA Tsunami Inundation DEM, and the regional 3 arc second DEM from the NOAA National Geophysical Data Center (NGDC). Before and during 2008, the CSUMB multibeam data was collected using a 244-kHz Reson 8101 multibeam system was used. After 2008, a 100-kHz Reson 7111 was used in deep water, and a 200/400-kHz Reson 7125 was used in shallow water. The mapping missions collected bathymetry from the 0-m isobath to beyond the 3-nautical-mile limit of California's State Waters. To generate contours, a smooth arithmetic mean convolution function that assigns a weight of one-ninth to each cell in a 3-pixel by 3-pixel matrix was applied iteratively to the bathymetry ten times. Following smoothing, contour lines were generated at 10-meter intervals from -10 m to -100 m and at 50-meter intervals from -100 m to -400 m.
Supplemental_Information:
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?

    Watt, Janet T., 2015, Contours -- Point San Luis map area [sheet 5]:.

    This is part of the following larger work.

    Watt, Janet T., Johnson, Samuel Y., Hartwell, Stephen R., and Roberts, Michelle, 2015, Offshore Geology and Geomorphology from Point Piedras Blancas to Pismo Beach, San Luis Obispo and Santa Barbara Counties, California: Scientific Investigations Map SIM 3327, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -120.998130
    East_Bounding_Coordinate: -120.613617
    North_Bounding_Coordinate: 35.291089
    South_Bounding_Coordinate: 35.072024

  3. What does it look like?

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

    Calendar_Date: 2015
    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):

      • String (151)

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

      The map projection used is WGS 1984 UTM Zone 10N.

      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000100
      Ordinates (y-coordinates) are specified to the nearest 0.000100
      Planar coordinates are specified in Meter

      The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257224.

  7. How does the data set describe geographic features?

    Contours_MorroBay3.shp
    Entity_Type_Definition: The shapefile attributes include FID - Internal Feature Number, SHAPE - feature geometry, ID - feature ID, and CONTOUR - contour depth value. The shapefile can be added to any ESRI ArcMap project. (Source: This report)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry (Source: ESRI)

    Polyline

    ID
    Unique identifier for each contour line. Value of 0 means the line segment has been generated during the smoothing process. (Source: ESRI)

    Range of values
    Minimum:0
    Maximum:410
    Units:Double

    CONTOUR
    Contours are lines that connect points of equal depth based on the bathymetry grid. (Source: USGS)

    Range of values
    Minimum:10
    Maximum:-200
    Units:Integer values 1-4 representing slope classes as described above.

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?

    USGS Pacific Coastal & Marine Science Center
    Attn: Janet Watt
    Geologist
    400 Natural Bridges Drive
    Santa Cruz, CA 95060
    USA

    (831) 460-7565 (voice)
    (831) 427-4748 (FAX)
    jwatt@usgs.gov

Why was the data set created?

These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to aid in assessments and mitigation of geologic hazards in the central California coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore.

How was the data set created?

  1. From what previous works were the data drawn?

    CSUMB (2009) (source 1 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_ba2_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 2 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_ba3_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 3 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bb_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 4 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bc_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 5 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bd_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 6 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_be_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 7 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bf_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 8 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bg_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 9 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bh_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 10 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bi_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

    CSUMB (2009) (source 11 of 11)
    Seafloor Mapping Lab, California State University Monterey Bay, 20091231, cc_bj_2mbthy.

    Online Links:

    Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID)
    Source_Contribution: Digital Elevation Model (2 meter resolution)

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

    Date: 2011 (process 1 of 1)
    The bathymetric contours for the Point Piedras Blancas to Pismo Beach area in central California were generated from bathymetry data collected by California State University, Monterey Bay (CSUMB) between 2007 and 2010, with additional bathymetry from the 1/3 arc second NOAA Tsunami Inundation DEM, and the regional 3 arc second DEM from the NOAA National Geophysical Data Center (NGDC). Before and during 2008, the CSUMB multibeam data was collected using a 244-kHz Reson 8101 multibeam system was used. After 2008, a 100-kHz Reson 7111 was used in deep water, and a 200/400-kHz Reson 7125 was used in shallow water. The mapping missions collected bathymetry from the 0-m isobath to beyond the 3-nautical-mile limit of California's State Waters. To generate contours, a smooth arithmetic mean convolution function that assigns a weight of one-ninth to each cell in a 3-pixel by 3-pixel matrix was applied iteratively to the bathymetry ten times. Following smoothing, contour lines were generated at 10-meter intervals from -10 m to -100 m and at 50-meter intervals from -100 m to -400 m.

  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?

    2 meters

  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?

    Unspecified Map elements were visually checked for overshoots,

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Use_Constraints:
This information is not intended for navigational purposes.
Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.

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

    U.S. Geological Survey, Coastal and Marine Geology Program
    Attn: Janet Watt
    400 Natural Bridges Drive
    Santa Cruz, CA 95060-5792
    US

    831-460-7565 (voice)
    831-427-4748 (FAX)
    jwatt@usgs.gov

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    This information is not intended for navigational purposes.
    This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
    Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: Jan-2013
Last Reviewed: Jan-2012
Metadata author:
U.S. Geological Survey, Coastal and Marine Geology Program
Attn: Steve Hartwell
400 Natural Bridges Drive
Santa Cruz, CA 95060-5792
US

831-460-7814 (voice)
831-427-4748 (FAX)
shartwell@usgs.gov

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.16 on Tue Apr 28 11:02:08 2015