Multibeam Sonar Mapping and Modeling of a Submerged Bryophyte Mat in Crater Lake, Oregon

Frequently-anticipated questions:

• What does this data set describe?
  1. How should 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 should this data set be cited?

   United States Geological Survey, 2008, Multibeam Sonar Mapping and Modeling of a Submerged Bryophyte Mat in Crater Lake, Oregon:.

   Online Links:

   • <https://pubs.usgs.gov/ds/366/>
   • <https://pubs.usgs.gov/ds/366/data.html>

   This is part of the following larger work.

   Dartnell, Peter, Collier, Robert, Buktenica, Mark, Jessup, Steven, Girdner, Scott, and Triezenberg, Peter, 2008, Multibeam Sonar Mapping and Modeling of a Submerged Bryophyte Mat in Crater Lake, Oregon: Data Series 366, U.S. Geological Survey, Coastal and Marine Geology Program, Western Coastal and Marine Geology, Menlo Park, CA.

   Online Links:

   • <https://pubs.usgs.gov/ds/366/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.16555054

   East_Bounding_Coordinate: -122.0498355

   North_Bounding_Coordinate: 42.97851439

   South_Bounding_Coordinate: 42.90490823

3. What does it look like?

   <https://pubs.usgs.gov/ds/366/images/bpi.jpg> (JPEG)

   Illustration of Bathymetric Positional Index calculated from 2000 multibeam bathymetry data set.

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

   Beginning_Date: 06-Aug-2004

   Ending_Date: 02-Apr-2008

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: Raster

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: 10

      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.9996

      Longitude_of_Central_Meridian: -123.00000

      Latitude_of_Projection_Origin: 0.00000

      False_Easting: 500000.0

      False_Northing: 0.00

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 2.0
      Ordinates (y-coordinates) are specified to the nearest 2.0
      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 meters.
      The flattening of the ellipsoid used is 1/0.003352811.
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   BPI15 is an ESRI GRID file with the following attributes: Cell Size = 2.000 Data Type: Integer Number of Rows = 4137 Number of Columns = 4677
   BOUNDARY Xmin = 568119.572 Xmax = 577473.572 Ymin = 4750592.815 Ymax = 4758866.815
   
   

   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)
   • United States Geological Survey (USGS),

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Peter Dartnell
   U.S. Geological Survey, Coastal and Marine Geology
   Physical Scientist
   345 Middlefield Rd MS-999
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5460 (voice)
   (650) 329-5411 (FAX)
   pdartnell@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 Bathymetric Positional Index in Crater Lake, OR.

How was the data set created?

1. From what previous works were the data drawn?

   dds-72 (source 1 of 1)

   U.S. Geological Survey, 200103, 2000 Multibeam Sonar Survey of Crater Lake Oregon: Data, GIS, Images, and Movies: U.S. Geological Survey, Menlo Park, CA.

   Online Links:

   • <http://wrgis.wr.usgs.gov/dds/dds-72/index.htm>

   Type_of_Source_Media: online

   Source_Contribution: base material

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

   Date: 2006 (process 1 of 1)

   The Bathymetric Positional Index was calculated from the 2000 multibeam bathymetry data using ESRI GRID map algebra and the following formula, BPI = int((bathymetry - focalmean(bathymetry, annulus, irad, orad)) + 0.5), where: int = GIS integer function, focalmean = GIS area function, annulus = processing neighborhood comprised of one smaller circle within a larger circle (donut shape), irad = inner radius of annulus in cells, and orad = outer radius or annulus in cells.

   Person who carried out this activity:
   

   Peter Dartnell
   U.S. Geological Survey, Coastal and Marine Geology
   Physical Scientist
   345 Middlefield Rd MS-999
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5460 (voice)
   (650) 329-5411 (FAX)
   pdartnell@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:

Please recognize the U.S. Geological Survey (USGS), the National Park Service (NPS), Oregon State University (OSU), and Southern Oregon University (SOU) as the source of this information. USGS-authored or produced data and information are in the public domain.

1. Who distributes the data set? (Distributor 1 of 1)
   U.S. Geological Survey, Information Services
   345 Middlefield Rd MS-532
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-4309 (voice)
   

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

   N-1-06-OR data sets

3. What legal disclaimers am I supposed to read?

   
   These data not intended for navigational purposes.
   Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.
   
   Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.
   
   Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.
   
   
   

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

     Data format:	ESRI GRID (version 9.1)
     Network links:	none

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 07-Apr-2008

Metadata author:

Peter Dartnell
U.S. Geological Survey, Coastal and Marine Geology
Physical Scientist
345 Middlefield Rd MS-999
Menlo Park, CA 94025-3561
USA

(650) 329-5460 (voice)
(650) 329-5411 (FAX)
pdartnell@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata ("CSDGM version 2") (FGDC-STD-001-1998)