About Cruise Tracks

A cruise track is a graphic representation of the geographic position data in a position variable, optionally combined with the data in an acoustic variable. The types of cruise track in Echoview are:

See also

GPS fixes

GPS fixes cruise tracks are created from position variables and provide information on the status of the GPS data.

To display a GPS fixes cruise track, do one of the following:

Cruise track window features

GPS fixes are displayed in the following way:

Notes:

See also

Using cruise tracks
Processing and smoothing cruise tracks

Adding map and Waypoint files to cruise tracks windows

Cruise track keyboard shortcuts

Processing GPS data

Mouse pointer duplication

Bottom classification display

A bottom classification produces a bottom points variable that contains geographic and bottom points data. The bottom points cruise track may be used to display bottom point class in alongtrack or point style. The bottom points cruise track can be auto-synchronized with a bottom points table, bottom points integram, echograms and Media window. From more information refer to About bottom classification.

To display a bottom points cruise track, do one of the following:

Alongtrack display

Alongtrack display is a color-coded cruise track showing integration or other processing results derived from an acoustic variable. For example, it is possible to create a cruise track showing the depth of the sea floor, or the mean Sv value, as seen below. Alongtrack displays can only be created from raw or virtual variables with a data type of Sv. For instructions, refer to Using cruise tacks: Displaying an alongtrack display cruise track.

To display an Alongtrack display, do one of the following:

Analysis results that can be output to an alongtrack display are:

To select analysis results for output to an alongtrack display, see Using cruise tracks: Alongtrack display.

Each segment on the cruise track shows the mean value of the selected analysis variable calculated across a range of pings. The range of pings for each segment is determined by the time/distance grid settings in the Variable Properties dialog box and can be based on time, distance, or number of pings. In the above example, each segment in the cruise track shows the mean Sv for every 20 pings of data.

Notes:

See also

Echogram navigation: Mouse Pointer duplication

3D cruise tracks

3D cruise tracks are a 3D object which can be added to scenes.

The 3D cruise track plots the position of the GPS antenna. See About transducer geometry for further information about how the position of the GPS antenna is specified.

See Displaying a 3D cruise track and Using a 3D cruise track for scene animation for further information.

Cruise track display controls

Scale bar

To display a scale bar for the cruise track window, select Show scale bar on the Cruisetrack Display page of the Variable properties dialog box. The scale bar shows nautical miles (nmi) and kilometers/meters (km or m).

Note: This is not available on 3D cruise tracks.

Grid lines

To display a gird lines for the cruise track window, select Show grid lines on the Cruisetrack Display page of the Variable properties dialog box. Grid line labels are affected by the Map Projection on Mapping page of the EV File Properties dialog box.

Zoom controls

To display a Zoom controls for the cruise track window, select Show zoom controls on the Cruisetrack Display page of the Variable properties dialog box.

Note: This is not available on 3D cruise tracks.

What is plotted where?

Each cruise track plots the course of a slightly different point of the echosounder system:

Track type Position
GPS fix cruise tracks GPS antenna
3D cruise tracks GPS antenna
alongtrack display cruise tracks transducer
bottom classification display transducer

The About transducer geometry page contains more information on how the GPS and transducer positions interrelate.

See also

Using cruise tracks
Processing and smoothing cruise tracks

Adding map and Waypoint files to cruise tracks windows

Cruise track keyboard shortcuts

About color schemes

About setting variable properties

Export positions

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