Grid of depth to basement in deep-water basins offshore Washington, Oregon, and California (cowbsmg.tif) based on data collected in 1984

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Frequently anticipated questions:


What does this data set describe?

Title:
Grid of depth to basement in deep-water basins offshore Washington, Oregon, and California (cowbsmg.tif) based on data collected in 1984
Abstract:
COWBSMG is a 1000-m resolution grid of depth to basement off of Washington, Oregon, and California constructed from depth to basement contour data (cowbsm.shp, also in this data set) from 1:1,000,000-scale maps (Gardner and others, 1992, 1993a, 1993b). The range in depth to basement in this region is -5582 to -985 m with a mean of -3817 m.
Supplemental_Information:

References cited

Gardner, J.V., Cacchione, David A, Drake, D.E., Edwards, B.D., Field, M.E., Hampton, M.A., Karl, H.A., Kenyon, N.H., Masson, D.G., McCulloch, David S, Grim, M S, 1992, Map showing depth to basement in the deep-sea basins of the Pacific continental margin, Point Conception to Point Loma: U. S. Geological Survey Miscellaneous Investigations Series I-2089-B, 1 sheet, scale 1:1,000,000 [https://pubs.usgs.gov/imap/2089/b/].

Gardner, J.V., Cacchione, D.A., Drake, D.E., Edwards, B.D., Field, M.E., Hampton, M.A., Karl, H.A., Kenyon, N.H., Masson, D.G., McCulloch, D.S., Grim, M.S., 1993a, Map showing depth to basement in the deep-sea basins of the Pacific continental margin, Strait of Juan de Fuca to Cape Mendocino: U. S. Geological Survey Miscellaneous Investigations Series I-2091-B, 1 sheet, scale 1:1,000,000 [https://pubs.usgs.gov/imap/2091/b/].

Gardner, J.V., Cacchione, D.A., Drake, D.E., Edwards, B.D., Field, M.E., Hampton, M.A., Karl, H.A., Kenyon, N.H., Masson, D.G., McCulloch, D.S., Grim, M.S., 1993b, Map showing depth to basement in the deep-sea basins of the Pacific continental margin, Cape Mendocino to Point Conception: U. S. Geological Survey Miscellaneous Investigations Series I-2090-B, 1 sheet, scale 1:1,000,000, [https://pubs.usgs.gov/imap/2090/b/].

Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology.
  1. How might this data set be cited?
    Wong, Florence L., and Grim, Muriel S., 2015, Grid of depth to basement in deep-water basins offshore Washington, Oregon, and California (cowbsmg.tif) based on data collected in 1984: U.S. Geological Survey, Coastal and Marine Geology Program, Pacific Coastal and Marine Science Center, Santa Cruz and Menlo Park, CA.

    This is part of the following larger work.

    Wong, Florence L., and Grim, Muriel S., 2015, Depth-to-basement, sediment-thickness, and bathymetry data for the Deep-Sea Basins offshore of Washington, Oregon, and California: U.S. Geological Survey Open-File Report OF 2015-1118, U.S. Geological Survey, Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -131.6487
    East_Bounding_Coordinate: -117.8917
    North_Bounding_Coordinate: 48.3597
    South_Bounding_Coordinate: 30.5860
  3. What does it look like?
    https://pubs.usgs.gov/of/2015/1118/images/cowbsmg.jpg (JPEG)
    preview image of report
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1984
    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. It contains the following raster data types:
      • Dimensions 1957 x 1023 x 1, type Grid Cell
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 10
      Transverse_Mercator:
      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 row and column
      Abscissae (x-coordinates) are specified to the nearest 1000.0
      Ordinates (y-coordinates) are specified to the nearest 1000.0
      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?
    Attribute Table
    Table containing attribute information associated with the data set. (Source: Producer defined)
    Value
    depth to basement (Source: Producer defined)
    Range of values
    Minimum:-5583
    Maximum:-985
    Units:meter
    Entity_and_Attribute_Overview:
    Cell Size =       1000.000    Data Type:  Floating Point
    Number of Rows    =   1957
    Number of Columns =   1023
    
          BOUNDARY  STATISTICS
    
    Xmin =    -144063.285    Minimum Value =  -5582.953
    Xmax =     878936.715    Maximum Value =   -985.293
    Ymin =    3402967.315    Mean=  -3817.224
    Ymax =    5359967.315    Standard Deviation =    779.386
    
          COORDINATE SYSTEM DESCRIPTION
    
    Projection   UTM
    Zone          10
    Datum      WGS84
    Units     METERS
    Spheroid   WGS84
    
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

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
    Geologist
    Mail Stop 999, 345 Middlefield Road
    Menlo Park, CA
    US

    650-329-5327 (voice)
    650-329-5299 (FAX)
    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: 2011 (process 1 of 1)
    
    
    A 1000-m grid was constructed from the following inputs to ArcGIS TopoToRaster tool: (1) digital contours from construction of 1992-1993 depth to basement maps (cowbsm.shp, also in this data set), and (2) points enclosed by outlines of "seamount peak" that were treated as "no data."
    
    CONTOUR cowbsm.shp depth_m
    ENFORCE OFF
    DATATYPE CONTOUR
    ITERATIONS 40
    ROUGHNESS_PENALTY 0.00000000000
    DISCRETE_ERROR_FACTOR 1.00000000000
    VERTICAL_STANDARD_ERROR 0.00000000000
    TOLERANCES 2.50000000000 100.00000000000
    EXTENT -126063.28536691575 3390967.31523177210 865936.71463308425 5368967.31523177210
    CELL_SIZE 1000.00000000000
    MARGIN 20
    
    
    The resulting grid was clipped to the extent of the input contours.
  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?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    Contour data (cowbsm.shp, 200-m interval from -800 to -5400 m) from which this grid was generated have a displacement of as much as 10km.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable.
  4. Where are the gaps in the data? What is missing?
    Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Attributes mean the same thing throughout the data set.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None. Please see 'Distribution Info' for details.
Use_Constraints:
These data are not to be used at scales greater than 1:500,000.

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 ArcGIS format, this metadata file may include some ArcGIS-specific terminology.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey (USGS) Coastal and Marine Geology (CMG)
    Attn: Florence L. Wong
    Geologist, GIS Coordinator
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5327 (voice)
    (650) 329-5190 (FAX)
    fwong@usgs.gov
  2. What's the catalog number I need to order this data set? cowbsm_tif.zip
  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: Apr-2015
Last Reviewed: Apr-2014
Metadata author:
U.S. Geological Survey
Attn: Florence L. Wong
Geologist, GIS Coordinator
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA
USA

(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.32 on Mon Jun 22 13:15:21 2015