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Import magnetometer data into SonarWiz
Apply cable out to navigation
Filter and edit your raw magnetometer data
Identify, mark and report on magnetic anomalies
Grid and contour the total and analytic magnetic fields
Display your data in 3D
For more information about the individual commands, please refer to the User Guide found in the Help Menu of SonarWiz. You can download a PDF version of this guide here.
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Download Demonstration Data |
Create a Project and Import Magnetometer Data:
1. Select the Create a New Project option in the Quick Access Toolbar.
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2. Enter a Project Name and then set the position of the data. Most magnetometer files are stored as a .CSV text file and the Get From File option will not be able to pull a valid position. In this case, you will need to either know the Approximate Latitude and Longitude of the project or select the project coordinate system manually.
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Approximate Project Position as shown:
Latitude: 21° 21.00000' N
Longitude: 157° 58.00000' W
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Click the Automatically Select CRS button. You should see that SonarWiz has selected EPSG:32604 (UTM Zone 4 North) as the coordinate system for this project.
3. Once the project is created, navigate to the Post Processing tab and use Click the Import drop down menu to select Magnetometer Files…
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Unlike sonar data that has a recognizable file format that SonarWiz can import, you will need to select the correct file template for your magnetometer files and your data must conform exactly to the fields in the template. For a complete list of the supported formats, see the Supported Magnetometer File Formats page.
By default, SonarWiz will downsample your magnetometer data to 1Hz (for example 10,000 raw records at 10Hz will result in 1,000 imported samples). This option can be turned off in the Downsampling Options section.
If your magnetometer data was recorded in projected easting and northing, you will need to specify the coordinate system used in the Import Geodesy section in order for SonarWiz to reproject into the project coordinate system.
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button to open the Import Dialog
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On the Import dialog, check Magnetometer and click the Options button to open the Magnetometer Setting panel:
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On the settings panel, select the File Template that matches your data. (GEMS Gradiometer for the example data used here).
Select the file to import and click the Import button.
4. Once the data is imported into the project, you will see files added to the Project Explorer as well as navigation track lines in the main display.
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