2009 Multibeam Sonar Data collected from the CCGS Nahidik

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?

   Ocean Mapping Group (OMG), 2009, 2009 Multibeam Sonar Data collected from the CCGS Nahidik: Ocean Mapping Group, University of New Brunswick, Fredericton, New Brunswick, Canada.

   Online Links:

   • <http://www.omg.unb.ca/Projects/Arctic/index.html>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -137

   East_Bounding_Coordinate: -133

   North_Bounding_Coordinate: 71

   South_Bounding_Coordinate: 70

3. What does it look like?

   <http://www.omg.unb.ca/Projects/Arctic/google/index.html> (Tiled Google Maps)

   Google Maps Interface of the OMG Arctic Multibeam Data

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

   Beginning_Date: 29-Aug-2009

   Ending_Date: 09-Sep-2009

   Currentness_Reference: NULL

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

   Geospatial_Data_Presentation_Form: OMG Merged Files, ESRI Grids and Images

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is WGS84 (G1150).
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.00 meters.
      The flattening of the ellipsoid used is 1/298.257 223 563.
      

7. How does the data set describe geographic features?

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Ocean Mapping Group (OMG)

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Ocean Mapping Group
   Attn: John Hughes Clarke
   Chair in Ocean Mapping
   Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
   Fredericton, New Brunswick E3B 5A3
   Canada
   

   506-453-4568 (voice)
   506-453-4943 (FAX)
   jhc@omg.unb.ca
   

Why was the data set created?

Multibeam Surveys were carried out as part of the Ocean Mapping Group's role in the ArcticNet program.

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: 01-Jan-2010 (process 1 of 3)

   Multibeam bathymetry, watercolumn and backscatter data were collected using a Kongsberg Simrad EM3002 multibeam sonar system. Standard collection settings used auto depth mode, angular coverage of +/- 65 degrees and highdensity equidistant beamforming. SIS was used to collect the data, while daily cleaning of data outliers was done using the Ocean Mapping Group's Swathed toolkit after conversion to OMG binary format. IMU data was parsed by the SIS software from a Coda Octopus F185. Secondary IMU data was logged from a Seatex MRU-6 motion sensor on the EM3002 Pole. RTG GPS data from a CNav 2050 GPS was used as the primary position input for SIS. Soundspeed information was from AML SVP&T sensor. F185 Firmware Version:, Software Version:, SIS Version:,; EM3002 PU Version:, CNav Unit: 2050, WaterColumn Settings: x_log_offset = 20

   Person who carried out this activity:
   

   James Muggah
   Ocean Mapping Group (OMG)
   Research Assistant
   Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
   Fredericton, New Brunswick E3B 5A3
   Canada
   

   506-453-5146 (voice)
   jmuggah@unb.ca
   

   Date: 01-Jan-2010 (process 2 of 3)

   - Multibeam Data was converted from the Kongsberg binary format to the Ocean Mapping Group binary format. - Primary navigation was set as the CNav 2050 output position (-0.4m ahead of EM3002 and -2.20m to starboard of EM3002).- The Attitude information was merged with the sounding data (RP set as EM3002 head). The patch test results were applied in post processing, roll: +2 degrees, pitch: +2 degrees, heading: +3.6 degrees. - The Navigation data was merged with the sounding data- Tides were applied using predicted tides from the Arctic8 tide model data. Depths are referenced to MSL.- Backscatter data was generated- Watercolumn data was extracted from the Kongsberg binary wcd format

   Person who carried out this activity:
   

   James Muggah
   Ocean Mapping Group (OMG)
   Research Assistant
   Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
   Fredericton, New Brunswick E3B 5A3
   Canada
   

   506-453-5146 (voice)
   jmuggah@unb.ca
   

   Date: 01-Jan-2010 (process 3 of 3)

   - The sounding data was inspected for errors in Sound Velocity using the soundscape software package.- The data was checked for integrity to ensure that previous processing steps were not missed.- The bathymetry and backscatter data was gridded into our 15'x30' basemap series. (<http://www.omg.unb.ca/Projects/Arctic/basemaps/index.html>)- The bathymetry and backscatter basemap tiles were used to generate the google map tiles. (<http://www.omg.unb.ca/Projects/Arctic/google/index.html>)

   Person who carried out this activity:
   

   James Muggah
   Ocean Mapping Group (OMG)
   Research Assistant
   Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
   Fredericton, New Brunswick E3B 5A3
   Canada
   

   506-453-5146 (voice)
   jmuggah@unb.ca
   

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?

   All sounding data was inspected daily and in post-processing and then all overlapping data was checked to ensure reliability.

2. How accurate are the geographic locations?

   1.0 meter (95% confidence) from CNav RTG GPS

3. How accurate are the heights or depths?

   Tidal accuracy estimated at 0.3 m (95% confidence) from Arctic8 tidal model

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

   Data was collected when the EM3002 was deployed for seabed mapping.

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

   NULL

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: Public

Use_Constraints: Not to be used for navigation

1. Who distributes the data set? (Distributor 1 of 1)
   Ocean Mapping Group (OMG)
   Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
   Fredericton, NB E3B 5A3
   Canada
   

   506-453-4568 (voice)
   

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

3. What legal disclaimers am I supposed to read?

   Research programs, the Ocean Mapping Group or ArcticNet take no liability for the use or transmission of this data

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

     Data format:	ESRI Grid and Image
     Network links:	<http://www.omg.unb.ca>

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 27-Feb-2015
Last Reviewed: 27-Feb-2015

Metadata author:

James Muggah
Ocean Mapping Group (OMG)
Research Assistant
Department of Geodesy and Geomatics Engineering University of New Brunswick 15 Dineen Drive P.O. Box 4400
Fredericton, NB E3B 5A3
Canada

(506) 453-5146 (voice)
jmuggah@unb.ca

Metadata standard:

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