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/video_ops.jpg> (JPEG)

   Illustration of point coverage with real-time lake floor observations recorded during 2006 ground-truthing cruise 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: 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):

      • Elliptical arc (1)

   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?

   map_limits

   name of shapefile (Source: none)

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   AREA

   Area of point (Source: ESRI)

   NA

   PERIMETER

   Perimeter of point (Source: ESRI)

   NA

   VIDEOOPS_

   Internal feature number (Source: ESRI)

   Coordinates defining the features.

   VIDEOOPS_1

   Internal feature number (Source: ESRI)

   Coordinates defining the features.

   LONG

   Geographic Coordinate (Longitude) (Source: ESRI)

   Coordinates defining the features.

   LAT

   Geographic Coordinate (Latitude) (Source: ESRI)

   Coordinates defining the features.

   TIME

   Time of observation (UTC) (Source: ESRI)

   Time defining the features.

   Comment

   Lake Floor Observation (Source: ESRI)

   Observation defining the features.

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,
   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 5-m isobaths within 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)

   Using the 2000 multibeam data as basemaps, a camera sled was towed behind the NPS RV Neuston and collected over 23 line kilometers of regular and high-definition video. For scale, paired lasers were associated with each video camera and were spaced 16 cm apart. The video cameras had a real-time feed up to the R/V Neuston where the video could be observed as well as recorded onto miniDV tapes. From these video, real-time observations such as presence or absence of the bryophyte mat, as well as the lake floor composition (rock, sediment) were recorded every minute into a navigational system (YoNav). Each observation was stamped with a time and a geographic coordinate based on differential GPS. The observations were converted into an ESRI shapefile.

   Person who carried out this activity:
   

   Peter Dartnell
   U.S. Geological Survey,
   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?

   These data contain attributes automatically generated by ESRI ArcGIS software, defined by the source, and additional user-defined attributes for use in analysis or model development.

2. How accurate are the geographic locations?

   unknown

3. How accurate are the heights or depths?

   not applicable

4. Where are the gaps in the data? What is missing?

   Complete

5. How consistent are the relationships among the observations, including topology?

   These data represent video observations recorded during August 2006 lake floor video survey.

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,
   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 shapefile (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,
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)