Paleoshorelines--Offshore Monterey Map Area, California

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Frequently anticipated questions:


What does this data set describe?

Title: Paleoshorelines--Offshore Monterey Map Area, California
Abstract:
This part of DS 781 presents data for the paleoshorelines for the geologic and geomorphic map of Offshore Monterey, California. The vector data file is included in "Paleoshorelines_OffshoreMonterey.zip," which is accessible from http://dx.doi.org/10.3133/ofr20161110. Sea level has risen about 125 to 130 m over about the last 21,000 years (for example, Stanford and others, 2011), leading to broadening of the continental shelf, progressive eastward migration of the shoreline, and associated transgressive erosion and deposition. Sea-level rise was apparently not steady, leading to development of a submerged shoreline along the flank of Carmel Canyon (water depths of 80 to 90 m) during a relative stillstand. Paleoshorelines were primarily mapped by interpretation of bathymetry and backscatter data. The bathymetry and backscatter data were collected between 2006 and 2009. References Cited Stanford, J.D., Hemingway, R., Rohling, E.J., Challenor, P.G., Medina-Elizalde, M., and Lester, A.J., 2011, Sea-level probability for the last deglaciation—A statistical analysis of far-field records: Global and Planetary Change, v. 79, p. 193–203, doi:10.1016/j.gloplacha.2010.11.002.
Supplemental_Information:
Map political location: Monterey County, California Compilation scale: 1:24,000 Base maps used are hillshades generated from IfSAR, LiDAR, and multibeam mapping both onshore and offshore (see "BathymetryHS_OffshoreMonterey_metadata.txt", DS 781, for more information).
  1. How might this data set be cited?
    Hartwell, S.R., Johnson, S.Y., Davenport, C.W., and Watt, J.T, 2016, Paleoshorelines--Offshore Monterey Map Area, California:.

    This is part of the following larger work.

    Johnson, Samuel Y., Dartnell, Peter, Hartwell, Stephen R., Cochrane, Guy R., Golden, Nadine E., Watt, Janet T., Davenport, Clifton W., Kvitek, Rikk G., Erdey, Mercedes D., Krigsman, Lisa M., Sliter, Ray W., and Maier, Katherine L., 2016, California State Waters Map Series--Offshore Monterey Map Area, California: Open-File Report OFR 2016–1110, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.064886
    East_Bounding_Coordinate: -121.811775
    North_Bounding_Coordinate: 36.692799
    South_Bounding_Coordinate: 36.532722
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/56cf5fc5e4b015c306ed183c?f=__disk__ec%2F89%2Fe9%2Fec89e9f49359b9b93c46254800f970f5a20b5955&allowOpen=true (JPEG)
    Pealeoshorelines of Offshore Monterey map area.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 2006
    Ending_Date: 2012
    Currentness_Reference:
    ground condition at the time the data were collected
  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 (14)
    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 0.0001
      Ordinates (y-coordinates) are specified to the nearest 0.0001
      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 1/298.257223563.
  7. How does the data set describe geographic features?
    Paleoshorelines
    lines representing mapped paleoshorelines (Source: This report)
    FID
    Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: Esri) Coordinates defining the features.
    Shape_Leng
    Length of feature in meters. (Source: Esri) Positive real numbers that are automatically generated.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • S.R. Hartwell
    • S.Y. Johnson
    • C.W. Davenport
    • J.T Watt
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: Stephen Hartwell
    Geologist
    400 Natural Bridges Drive
    Santa Cruz, CA
    USA

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

Why was the data set created?

To expand geologic mapping to the seafloor within California's State Waters, to update coastal geologic mapping, and to contribute to a uniform regional geologic database. Additionally, to provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the Monterey Bay coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes

How was the data set created?

  1. From what previous works were the data drawn?
    DS 781 ("Bathymetry_OffshoreMonterey_metadata.txt") (source 1 of 2)
    Dartnell, Peter, and Kvitek, Rikk G., 2016, Bathymetry--Offshore of Monterey Map Area, California: Data Series DS 781, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    See metadata for ("Bathymetry_OffshoreMonterey_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information.
    Type_of_Source_Media: digital file of gridded bathymetry data (ArcInfo GRID)
    Source_Contribution: Gridded bathymetry data (2-meter and 5-meter-resolution).
    DS 781 ("Backscatter--Offshore of Monterey Map Area, California") (source 2 of 2)
    Dartnell, Peter, and Kvitek, Rikk G., 2016, Backscatter--Offshore of Monterey Map Area, California: Data Series DS 781, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    See metadata for ("BackscatterA_CSUMB_OffshoreMonterey_metadata.txt" and "BackscatterB_USGS_OffshoreMonterey_metadata.txt") in DS 781 for amplitude source data and postprocessing/reprocessing information.
    Type_of_Source_Media: digital file of gridded amplitude data (ArcInfo GRID)
    Source_Contribution: Gridded amplitude data (1-meter and 5-meter-resolution).
  2. How were the data generated, processed, and modified?
    Date: 2014 (process 1 of 1)
    Paleoshorelines were digitized by heads-up screen digitization of line data from the interpretation of (1) 2-meter-resolution hillshaded-bathymetry data from bathymetric-lidar and sonar surveys, and (2) 2-meter-resolution amplitude (backscatter) data from bathymetric-sonar surveys (both listed in the Source Information section), as well as (3) slope and curvature derivatives of the bathymetry data.
  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?
    Paleoshorelines were primarily mapped by one of the following methods: (1) interpretation of 2-meter-resolution hillshaded bathymetry data from bathymetric lidar and sonar surveys; (2) interpretation of 2-meter-resolution amplitude (backscatter) data from bathymetric sonar surveys and (3) interpretation of 2-meter slope and curvature derivatives of bathymetry data. Paleoshorelines were digitized by heads-up screen digitization of line data on 2-meter-resolution DEMs described above. Horizontal accuracy is estimated to be between 2 and 5 meters depending on how clearly contacts can be resolved using heads-up screen digitizing methods.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Data are complete: no offshore features that could be accurately identified and represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 100 square meters. All geospatial database elements are attributed.
  5. How consistent are the relationships among the observations, including topology?
    Map elements were visually checked for overshoots, undershoots, duplicate features, and other errors by the lead authors and by the GIS technician(s) who created the digital database. Review drafts of the map were reviewed internally by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards.

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
    345 Middlefield Rd
    Menlo Park, CA
    USA

    (650) 329-4309 (voice)
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    These databases, identified as geology maps of Monterey Bay and Vicinity, California have been approved for release and publication by the U.S. Geological Survey (USGS). Although these databases have been subjected to rigorous review and are 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 these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. 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. These data are not intended for navigational use.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: The .zip file for a shapefile includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as the text (.txt) and XML (.shp.xml) versions of the metadata for the Paleoshoreline data layer of Offshore Monterey, California. in format SHP (version ArcMap (version 10.0, Esri , 2011)) Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates, with datum WGS84. Size: 0.2
      Network links: https://www.sciencebase.gov/catalog/file/get/57a260dde4b006cb45553f27
      http://pubs.usgs.gov/ds/781/
    • Cost to order the data: none

  5. What hardware or software do I need in order to use the data set?
    The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcMap TIFF. Users should download the ArcGIS Project File, OffshoreMontereyGIS.mxd.zip, a compressed (with the "zip" command) version of the ArcMap document (.mxd) that has all the data layers loaded in the table of contents for "Offshore Monterey" and has all the data symbolized as on the SIM map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.

Who wrote the metadata?

Dates:
Last modified: 09-May-2017
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: Stephen R. Hartwell
400 Natural Bridges Drive
Santa Cruz, CA
US

831-460-7814 (voice)
831-427-4748 (FAX)
shartwell@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/cal_state_waters/Paleoshorelines_OffshoreMonterey_metadata.faq.html>
Generated by mp version 2.9.49 on Mon Sep 10 17:43:40 2018