New in Echoview 3.25
Welcome to Echoview 3.25!
This help file has been prepared for the beta release of Echoview 3.25. It is still undergoing development and may contain omissions or errors. In case of uncertainty please contact SonarData. A complete and accurate help file will be delivered with the final release of Echoview 3.25.
Echoview 3.25 introduces features designed to further enhance your data manipulation and visualization, and to streamline your workflow.
Echoview workspaces may now be saved upon exit and restored to the same state when next opened. Echograms now optionally include analysis information using integrams to display a property or statistic of each ping, while the Variables window now also shows platform and transducer geometry with their relationship to each variable. All open multibeam echograms can optionally be synchronized. Multibeam ping curtains have been developed to more clearly show schools and other objects.
Click the links below to find out more about these and many other new features and changes that have been introduced with this release. If you have any questions or would like additional information, please contact Echoview support.
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New features and changes for all Echoview users |
New features and changes for users of data from specific echosounders |
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Note: Each link will take you to a subsection on this page. |
Note: Each link will take you to a separate page. |
Auto-synchronization
Echoview now supports auto-synchronization of multibeam echograms. Auto-synchronized echograms will respond in unison to the replay controls.
See: See Auto-synchronization of multibeam echograms for more information.
Save and restore workspace
Echoview will now save the size, position and contents of all windows you are using when you close or save your EV file, and restore these when you open the EV file again. This is optional and can be configured. See workspace and EV File page of the EV File Properties dialog box for further information.
Variables and Geometry window
The Variables window has been expanded to include transducer geometry. It is now the Variables and Geometry window and shows transducer and platform objects, and their relationships. You can now clearly visualize and document these relationships. The Variables and Geometry window can now be used to access any raw or virtual variable, and to check platform or transducer properties.
Integram: displaying integration results
What was the user ping status area in earlier releases (a colored band you can display beneath your echograms) is now the integram area. This area is now used for an integram in which you can now choose to display mean Sv, maximum Sv or ping status beneath an echogram on a per-ping basis. Data excluded from analysis is not included in the integram calculations. With this tool you can now easily identify where bottom signal inclusions occur in your analyses.
Roll Correction
Echoview can now read roll data from data files, and you can present this as a graph or apply it to multibeam variables to provide a limited form of roll correction. To do this you will need to use the new multibeam roll at transducer operator.
Multibeam ping curtains
An echogram curtain is useful for adding details that appear on an echogram, such as fish marks, to a scene. These were available for single beam echograms, and are now available for multibeam echograms as well. There is now a new type of 3D object, the multibeam ping curtain. You can create multibeam ping curtains to be used as a backdrop showing the lateral and temporal extent of fish schools, and to visualize the motion of the platform.
New and modified operators
Echoview's new operators primarily target more effective noise removal, data processing and roll correction for multibeam data.
New operators
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New operators |
Description |
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Multibeam operators useful for noise removal |
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Finite Impulse Response (FIR) |
This operator applies a finite impulse response filter to multibeam data. |
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This operator applies an infinite impulse response filter to multibeam data. |
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This operator calculates the median of N pings (the current ping and N-1 earlier pings as available). |
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This operator calculates the minimum of N pings (the current ping and N-1 earlier pings as available). |
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Data manipulation operators |
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This operator is used to fill the data points in matching regions with a statistic describing the data within those regions. A new echogram could be produced for example, in which all regions covering schools were filled with the mean Sv of those schools. The result could then be used to classify the data in those schools. |
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This operator thresholds the data in one variable such that it is maximally equal to the data in a second variable, on a sample for sample basis. |
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Multibeam roll correction operators |
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This operator applies roll from a roll variable to a multibeam variable assuming it occurred at the transducer location, and in the same plane as the beam fan. This provides a limited form of roll correction for multibeam data. |
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This operator selects the closest beam to a specified angle from vertically down, for multibeam data. |
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Modified operators
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Modified operators |
Description |
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Resample by distance interval |
These operators can now calculate not only the mean value over any sampling interval, but also minimum, maximum, median or percentile values. |
See Operators for more information about these, and other, operators.
Note: The Average of N previous pings operator which appeared in Echoview 3.20 is now called Mean of N previous pings.
New file formats
The following file formats are now supported in Echoview: