The SEG-Y (sometimes SEG Y) file format is one of several standards developed by the Society of Exploration Geophysicists (SEG) for storing geophysical data. It is an open standard, and is controlled by the SEG Technical Standards Committee, a non-profit organization. SEG-Y files are also suitable for storing bathymetric data, and some echosounder brands, including Innomar, Knudsen and SyQwest, are using this file format to export position, depth and echogram data.
At this moment Hydromagic can only export single beam (sub bottom) data as SEG-Y.
The SEG-Y export tool can only be started from the "Raw Data File Manager" in Hydromagic Survey. This option is not available in Hydromagic Dredging, since no raw data files are used in this application. First open the "Raw Data File Manager" by right-clicking the "Raw Data" folder in the "Project Explorer". From the pop up menu which appears, select the "Manage Files..." option.
Right click the "Raw Data" folder and select "Manage Files...".
In the "Raw Data File Manager", multiple export options are offered, including HYPACK, SEG-Y and XTF format. Using the exporting tools, you can export one or more files. Select the raw data files you want to export and click the "Export SEG-Y" button to start the SEG-Y export tool.
The raw data files manager shows a list of raw data files in the project.
Click the "Browse..." button to select in which folder the SEG-Y files will be written. By default the "Exports" folder in your project map will be used, unless you selected another folder in the past. When one or more files already exist you will be notified. To force replacement of existing files, check the "Overwrite existing files without warning" check box.
When you didn't select any file from the "Raw Data File Manager" tool before opening the SEG-Y export tool, you can select the files to export by clicking the "Select..." button. From the windows that opens, you can select the files to be exported by setting the checkboxes.
Select which raw data files will be included in the export.
Check the sounding channel you want to export. For SEG-Y files, only one channel can be saved at a time. To export multiple channels, export them one by one, and adjust the "File Name Prefix" value to indicate what is stored in the file. You can choose the regular echo sounder channels (low and high frequency) as well as sub bottom data channels. When echo envelope samples are available they will be stored in the generated SEG-Y files as well. You can click the "OK" button to start the export process. When the export process did not complete successfully, you can refer to the "Processing" tab of the activity view for more details on the error shown.
Select which channel to export, and click OK to start the export process.
