ArcInfo GRID format of the 2004 Multibeam Backscatter Data in the Northeastern Channel Islands Region, Southern California [mos.zip]

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Dartnell, Peter, Cochrane, Guy R., and Dunaway, Mary Elaine, 2005, ArcInfo GRID format of the 2004 Multibeam Backscatter Data in the Northeastern Channel Islands Region, Southern California [mos.zip]: Open-File Report DOI:10.3133/ofr20051153, U.S. Geological Survey, Reston, Virginia.

   Online Links:

   • http://pubs.usgs.gov/of/2005/1153/ci-data.html
   • http://pubs.usgs.gov/of/2005/1153/data/mos.zip

   This is part of the following larger work.
   Dartnell, Peter, Cochrane, Guy, and Dunaway, Mary Elaine, 2005, Multibeam Bathymetry and Backscatter Data: Northeastern Channel Islands Region, Southern California: Open-File Report 2005-1153, U.S. Geological Survey, Reston, VA.

   Online Links:

   • http://pubs.usgs.gov/of/2005/1153/ci-index.html

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -119.72
   East_Bounding_Coordinate: -119.03
   North_Bounding_Coordinate: 34.33
   South_Bounding_Coordinate: 33.88
   

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 06-Aug-2004

   Ending_Date: 15-Aug-2004

   Currentness_Reference:

   ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: ArcInfo GRID
   

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, 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: 11
      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -117.00000
      Latitude_of_Projection_Origin: 0.00000
      False_Easting: 0.00
      False_Northing: 0.00
      

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 15.0
      Ordinates (y-coordinates) are specified to the nearest 15.0
      Planar coordinates are specified in Meters
      The horizontal datum used is WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.00.
      The flattening of the ellipsoid used is 1/0.003352811.
      
7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   MOS is an ArcInfo GRID with the following attributes: Cell Size = 15.000 Data Type: Floating Point Number of Rows = 3163 Number of Columns = 3945
   BOUNDARY Xmin = 251306.282 Xmax = 310481.282 Ymin = 3753319.315 Ymax = 3800764.315
   STATISTICS Minimum Value = 3.000 Maximum Value = 247.931 Mean = 206.873 Standard Deviation = 9.064

   Entity_and_Attribute_Detail_Citation: none
   

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Peter Dartnell
   • Guy R. Cochrane
   • Mary Elaine Dunaway
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: PCMSC Science Data Coordinator

   2885 Mission Street

   Santa Cruz, CA
   

   US

   831-427-4747 (voice)

   pcmsc_data@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) or other software to display acoustic backscatter data of the Northeastern Channel Islands, CA Region.

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: 30-Nov-2004 (process 1 of 3)

   The multibeam bathymetry and acoustic backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM1002 multibeam sonar system. The data are cleaned of bad navigation and depth readings and corrected for tides to mean lower low water datum using a predictive tide model. The depth readings are gridded into a common grid. The gridded data are converted to ArcInfo GRID format using ArcInfo's ASCIIGRID command. Person who carried out this activity:
   

   Peter Dartnell

   U.S. Geological Survey, Coastal and Marine Geology Program

   Physical Scientist

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   (831) 460-7415 (voice)

   pdartnell@usgs.gov

   Date: 19-Nov-2019 (process 2 of 3)

   Keywords were refined. Point of Contact and Metadata Contact were changed to static contact information. Several other typos were corrected and the metadata file was upgraded overall to current PCMSC standards. No data were changed. Person who carried out this activity:
   

   Susan A Cochran

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission St.

   Santa Cruz, CA
   

   United States

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 19-Oct-2020 (process 3 of 3)

   Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: VeeAnn A. Cross

   Marine Geologist

   384 Woods Hole Road

   Woods Hole, MA
   

   508-548-8700 x2251 (voice)

   508-457-2310 (FAX)

   vatnipp@usgs.gov

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?
   Not applicable for raster data.
2. How accurate are the geographic locations?
   0.5 meters
3. How accurate are the heights or depths?
   0.05 percent of the water depth.
4. Where are the gaps in the data? What is missing?
   Complete
5. How consistent are the relationships among the observations, including topology?
   Unspecified

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:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.

1. Who distributes the data set? (Distributor 1 of 1)
   
   U.S. Geological Survey, Coastal and Marine Hazards and Resources Program

   Attn: Peter Dartnell

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   (831) 460-7415 (voice)
2. What's the catalog number I need to order this data set? USGS Open-File Report 2005-1153 Acoustic Backscatter Data ESRI ArcInfo GRID [mos.zip]
3. What legal disclaimers am I supposed to read?

   Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by 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.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	ArcInfo GRID format (version 8.0.2) Size: 15.0
     Network links:	http://pubs.usgs.gov/of/2005/1153/data/mos.zip

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 19-Oct-2020

Metadata author:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Attn: PCMSC Science Data Coordinator

2885 Mission Street

Santa Cruz, CA

US

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

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