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The EV File Properties dialog box is used to enter settings associated with the current EV file.
To display the EV File Properties dialog box:
.The EV File Properties dialog box contains the following pages:
The Classification page is used to create, edit and view classification rules for the Classify region feature. Classification can be applied with a 2D school detection, or to selected 2D regions on single beam echograms. For more information refer to Classifying regions.
The following sections are available:
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Section |
Description |
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| Rules |
The Rules section specifies a Rule's Name and a Rule's Region class.
The Rule's Name can by typed. The Rule's Region Class can be selected from the list of available classes. Notes:
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| Special cases |
The Special cases section is used when there are multiple Rules. You can specify a Region Class to apply for the listed Special cases:
Select an available Region Class from the list. The Do Nothing item leaves the region class unchanged. |
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| Analysis variable, Condition, Value |
This section specifies a Rule's conditional tests which are used to assess a region.
A conditional test is specified by the relationship between the Analysis variable, Condition and Value.
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The Echogram page of the EV File Properties dialog box controls the display of echograms in the EV file.
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Settings |
Description |
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Echogram mode |
Defines whether the vertical dimension on echograms is displayed in depths or ranges. See About depth and range mode for further details. |
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Show on echogram
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If selected, a color bar is displayed at the bottom of the echogram indicating the position status of pings and GPS fix status. |
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If selected, Echoview displays analysis-hatching covering the analyzed area upon completion of an on-screen integration or an on-screen analysis on an echogram. |
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If selected, region names are displayed with each region on the echogram. |
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If selected, region classes are displayed with each analysis region on the echogram. Note: A Region class is not displayed for unclassified regions. |
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If selected, annotations (Notes) for marker regions are displayed with each marker region on the echogram. |
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If selected, the geographic position of the platform at each time/distance grid line is displayed on the echogram. The geographic positions will be displayed as degrees (latitude/longitude) or meters (eastings/northings) depending on the settings on the Mapping page of the EV file Properties dialog box. |
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If selected, bad data regions are subtly shaded when they are not actively selected on the echogram. |
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If selected, analysis regions are subtly shaded when they are not actively selected on the echogram. |
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If selected, marker regions are subtly shaded when they are not actively selected on the echogram. |
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Defines the replay rate for multibeam echograms. Note: You can assign a user-defined keyboard shortcut to increment or decrement the replay rate.
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About Echograms
Understanding echograms
Depth and Range Mode
About regions
The Line Pick page of the EV File Properties dialog box is used to enter the settings for picking lines in single (or split or dual) beam echograms.
The following line pick algorithms are offered:
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Line pick algorithm |
Description |
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Delta Sv |
See Delta Sv algorithm for details. |
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Maximum Sv |
See Maximum Sv algorithm for details. |
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Best bottom candidate |
See Best bottom candidate line pick algorithm for details. |
Available settings depend on the algorithm chosen:
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Basic settings |
Description |
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Start depth |
Determines at what depth the Line picking algorithm will start, i.e. data above this depth will not be considered. This is particularly useful if you have high return areas at the top of your echogram that you wish to avoid being picked as bottom. |
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Stop depth |
Determines at what depth the Line Picking algorithm will stop i.e. data below this depth will not be considered. |
| Minimum Sv for good pick (dB) | See Maximum Sv algorithm or Best bottom candidate settings description for details. |
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Minimum Sv delta for pick (dB) |
See Delta Sv algorithm for details. |
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Backstep settings |
Description |
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Use Backstep |
When checked the Discrimination level and Backstep range settings are available. |
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Discrimination level (dB) |
See Best bottom candidate settings description or Maximum Sv algorithm for details. |
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Backstep range (m) |
See Best bottom candidate settings description or Maximum Sv algorithm for details. |
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Advanced settings |
Description |
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Peak threshold (dB) |
See Best bottom candidate settings description for details. |
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Maximum dropout (samples) |
See Best bottom candidate settings description for details. |
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Window radius (samples) |
See Best bottom candidate settings description for details. |
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Minimum peak asymmetry |
See Best bottom candidate settings description for details. |
About lines
Line picking and bottom detection
Line picking algorithms
Multibeam bottom detection algorithm
About the Best bottom candidate line pick
The ping status page is used to configure the available ping status values.
Each ping in an EV file has an associated ping status flag that can be defined by the user. For example, the status might be used to visually classify the echogram according to bottom type or to flag areas where interpretation is uncertain.
The color bar at the bottom of each echogram will show the ping status if Show ping status has been selected in the Integram analysis section on the Echogram Display page of the Variable Properties dialog box.
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Settings |
Description |
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0 (not set) |
This cannot be changed and is used to represent pings that have no ping status assigned. |
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1......10 |
Enter a name and choose a color for each ping status you would like to define. Each ping status defined will be made available on the shortcut menu (right-click) for defining ping status. See Integram area. |
The Export page of the EV File Properties dialog box is used to select the variables and format of export files generated by the Export menu commands.
The Export these analysis variables section is used to select the analysis variables you want included in your exports. Matches to text in the filter area can help you to select export variables (from the export categories).
The analysis variables are grouped into categories and presented in a tree. To expand or collapse a category click the + or - sign next to the category name.
To select an analysis variable for export, or a whole category, select the check box next the variable or category's name. The check box next to a category name indicates the status of the individual analysis variables as follows:
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none | of the analysis variables in this category are selected for export |
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some | |
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all |
See About analysis variables for full descriptions and details on when different variables are exported.
The Analysis by cells section is used to select the export format for analysis-by-cells and analysis-by-regions-by-cells exports. The following options are available:
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Settings |
Description |
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Database format (multiple files) |
Exports data to multiple .csv files:
The exported data are formatted for use with a database application. |
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Spreadsheet format (single file) |
Exports data to a single .csv file. The exported data can be opened in any application that supports the .csv file format, e.g. a spreadsheet application. Note: This format is the only format available for analysis by region and analysis by selection exports. |
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Output empty cells |
See Output Empty Cells for details on this check box. |
When the Output empty single target pings setting is checked, empty pings are exported for Single target exports. This allows exported Single target .csv data to be correctly re-imported into Echoview.
The Biomass export setting is used to select the units that will be used for the Density_number and Density_weight analysis variables. This setting will affect all exports made from the EV file.
The Schools page of the EV File Properties dialog box is used to enter the settings that control schools (shoal) detection.
The Single-beam schools section is used to enter schools detection settings for two dimensional echograms (as opposed to multibeam echograms).
Echoview schools detection identifies data points which can be determined as "school candidates". "School candidates" are data points which meet the minimum requirements for length and height. Candidates which meet the relevant criteria can be linked to one another to form a larger candidate.
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Settings |
Description |
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Minimum total school length |
After linking is completed, schools shorter than this length will not be included in detections. |
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Minimum total school height |
After linking is completed, schools shorter than this height will not be included in detections. |
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Minimum candidate length |
Minimum length allowed for a single school candidate. |
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Minimum candidate height |
Minimum height allowed for a single school candidate. |
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Maximum vertical linking distance |
Maximum vertical distance allowed between two school candidates being linked to form a school. |
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Maximum horizontal linking distance |
Maximum horizontal distance allowed between two school candidates being linked to form a school. Note: The two linking distances form the vertical and horizontal semi-axes of an ellipse. The ellipse is, in effect, moved around the boundary of a school candidate. If any part of any other school candidate falls within the ellipse, a link is created between the school candidates. |
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Distance mode |
Choose whether GPS or vessel log information is used to determine distance for all school detection settings. The length measurement used in the calculation of Schools analysis variables, pertaining to distance or length, is also determined by this setting. |
Notes:
Other settings are also relevant to schools detection, in particular the settings on the Data page of the Variable Properties dialog and the Exclude above line and Exclude below line settings on the Analysis page.
Assumptions about the data used for schools detection and for calculating corrected schools parameters are made in some schools detection algorithms, for example, that only a minimum Sv threshold has been applied to the data. Echoview can filter and condition data in ways that may not be compatible with the assumptions of the schools detection algorithms. It is not possible for the software to automatically check for situations in which these assumptions are not met. Please review the algorithms.
School candidates are linked when there is a clear path between them. The presence of valid samples between school candidates can result in candidates not being linked by the algorithm. If you are confident that particular schools should be linked (but aren't by the algorithm), the intervening "valid" samples can be included in a bad data region and you can redo the schools detection.
The detection can be applied when live-viewing data or at the post-processing stage. Following a detection, classification with rules can be applied.
3D Schools detection is used for multibeam data only.
Click 3D Schools detection properties to open the 3D Schools Detection Properties dialog box.
About detecting schools
Using the schools module
Notes about schools detection
Schools detection module algorithms
The Fish Tracks page of the EV File Properties dialog box is used to access fish track detection settings and control 3D single target graph displays.
Click Track Detection Properties to display the Track Detection Properties dialog box.
Note: Other settings that are relevant to fish track detection, in particular Exclude above line and Exclude below line, are located on the Analysis page of the Variable Properties dialog box.
Select the Show multiple 3D beams check box to show multiple 3D beams on 3D single targets graphs.
Note: 3D single targets graphs require a lot of memory and are currently limited to approximately 50 evenly spaced beams, including the first and last beams.
Fish track editing
Fish track analysis variables
About beam geometry
Exporting Fish Tracks
The EV File page of the EV File Properties dialog box is used for file management and window display actions of the EV file.
Data file locations displays the folders that Echoview will look for data files in when an EV file is opened.
Calibration file locations displays folders that Echoview will look for ECS files in when an EV file is opened.
The display is managed with the following settings:
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Settings |
Description |
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New |
Adds a new folder to the list. The following options are available on the button menu:
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Delete |
Deletes the selected folder from the list. |
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Move up |
Moves the selected folder up in the list. |
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Move down |
Moves the selected folder down in the list. |
The following special folder names may appear in the list:
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Folder |
Description |
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%Data File Folder% |
This is the path to the folder from which data files were first added. Note: For new EV files, the Data files location specified on the File Locations page of the Echoview Configuration dialog box is listed as the default Data files folder. |
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%EV File Folder% |
This is the folder the EV file is stored in. |
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%Calibration File Folder% |
This is the path to the folder from which ECS files were first added. Note: For new EV files, the Calibration files location specified on the File Locations page of the Echoview Configuration dialog box is listed as the default Calibration files folder. In addition, by default, Echoview will look in %EV File Folder%. |
The workspace in Echoview consists of windows, their positions and contents. When an EV file is opened Echoview provides the workspace defined here.
In the When this EV file is opened list you can selection one of:
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Setting |
Description |
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Restore windows from last close |
When you open this EV file in Echoview it will restore all of the windows, their positions and contents as they were displayed when you closed the EV file. Note: To close the EV file without altering the workspace click Close on the File menu. This feature is useful if, when you open an EV file, you would like to see the EV file as you left it. The workspace is saved when you close the EV file. |
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Restore windows from last save |
When you open this EV file in Echoview it will restore all of the windows, their positions and contents as they were displayed when you last saved the EV file. This feature is useful if you would like to define a stable workspace which is not influenced by changes you make during any one session working with Echoview. The workspace is saved when you save the EV file. |
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Open these windows |
When you open the EV file the selected windows will be displayed in their default positions (the workspace is not saved, the choice of windows only is saved). Click in the list, any of the following types of window:
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Setting |
Description |
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Select this setting when you want to interpret Simrad Ex60 multiplexed channels. You can change the setting only before data files are added to a fileset. |
The Classes page of the EV File Properties dialog box is used to create, edit and delete Region classes, Target classes and Species.
Classes are displayed under section headings for Region Classes, Species and Target Classes.
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Settings |
Description |
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New |
Click a class in the desired section and click New to display:
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Properties |
Click a class in the desired section and click Properties to edit properties for: You can also display the Properties by double-clicking on the region class, species name or target class in the list. |
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Delete |
Click a class in the desired section and click Delete to delete the selected Region class, Species or Target class. Notes:
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Create marker regions from data files |
Select this setting to automatically create marker regions when data files are added to an EV file. Uncheck this setting to improve Echoview's performance whilst loading data files with marker regions. Existing marker regions in the EV file are unaffected. |
The Mapping page of the EV File Properties dialog box is used:
Echoview currently supports Equirectangular and UTM projections, but other mapping projections will be supported in future. See About mapping and projections for further information.
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Settings |
Description |
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Datum |
Displays the datum for geographical information. Note: only the WGS 84 datum is currently supported by Echoview. |
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Map Projection |
Select the appropriate projection from this list. |
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Units |
Displays the appropriate units for the selected projection. Note: When UTM projection is selected, geographic position is reported as eastings and northings in meters; otherwise geographic data is in the form of decimal degrees of longitude and latitude. |
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UTM zone |
This section is only available when the UTM projection has been selected. Select the Zone number and hemisphere in which the data was collected. |
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Standard parallel |
This section is only available when the Equirectangular projection has been selected. Choose Adaptive or Specified latitude as standard reference. Note: If Specified latitude is selected, the latitude must also be entered in either decimal degrees or degree and minutes format. |
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Map and waypoint files |
Click Add to load map and waypoint files that can be displayed with cruise tracks. Select a file in the list and click Remove to delete it from the list. Notes:
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Notes:
Geographic position data will be displayed on the status bar in units appropriate to the selected projection.
Changing the projection while viewing a scene or cruise track may cause the scene or cruise track to change.
If exported geo-referenced images from scenes or cruise tracks are expected to match up with other geo-referenced data from other sources, it is important that they all use the same projection and datum.
The Response Curves page of the EV File Properties dialog box is used to define the color response curves available in an EV file. See About color response curves for further information.
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Settings |
Description |
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Lists the response curves currently defined. By default there is one response curve provided which you cannot edit. It is called Linear. To create a new response curve, position the mouse pointer over the Response curves list area and on the shortcut menu (right-click), click New. You can also Rename, Delete and Copy response curves using the shortcut menu commands. Click on a response curve to select it, and display its graph. |
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Example color scheme |
Select a color scheme to use on the edges of the graph. |
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Graph |
This is the graph which defines the response curve. The default response curve (Linear) is a straight line. You cannot edit this graph for this response curve. To edit a response curve you must first create a new response curve (see Response curves). To edit a response curve you can:
Note: there are constraints to which the curve must conform. You may not be able to add, delete or move nodes with complete freedom. See About color response curves for further information. |
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Coordinates |
If the mouse pointer is over the graph then the coordinates of the mouse pointer on the graph will appear here. The coordinates are measured for In and Out from 0% to 100%. See About color response curves for further information. |
The Notes page of the EV File Properties dialog box displays the version of Echoview that was last used to save the EV file and can be used to record any extra information about the EV file that is not otherwise captured in Echoview.