Exporting georeferenced samples

You can export Georeferenced Samples (as 3D points) from selected acoustic variables of supported data types to a .points.csv file.

To export all Georeferenced Sample data from a variable:

Display an acoustic variable.
On the Echogram menu, point to Export, Georeferenced Samples and click Whole Echogram...
When it is a multibeam variable, specify the pings to export.
Enter the filename for your export in the Export data as Georeferenced Samples dialog box.

Output is *.points.csv or *.mb.points.csv (multibeam data).

To export Georeferenced Sample data from a selection or region:

Display an acoustic variable.
Use one of the selection tools to make a selection for export or select a region.
On the Shortcut menu, point to Export Selection or Export Region, and click Georeferenced Samples...
When it is a multibeam variable, specify the pings to export.
Enter the filename for your export in the Export data as Georeferenced Samples dialog box.

Output is *.points.csv or *.mb.points.csv (multibeam data).

To export Georeferenced Samples by Regions:

Display an acoustic variable.
On the Echogram menu, point to Export, Georeferenced Samples and click By Regions...
Specify the region class or classes on the Export values as Georeferenced Samples by Regions - Select Classes dialog box and click Export.
Enter the filename for your export.

Output is *.points.csv or *.mb.points.csv (multibeam data).

A selection and Georeferenced Samples by Regions

Georeferenced Samples are exported for regions that overlap a selection time. For this type of export, the region(s) might not overlap the selection.

Display an acoustic variable.
Use one of the selection tools to make a selection on the echogram.
On the Shortcut menu, point to Export Selection, Georeferenced Samples by Regions...
Specify the region class or classes on the Export Selected Values as Georeferenced Samples by Regions - Select Classes dialog box and click Export.
Enter the filename for your export.
Click Save.

Output is *.points.csv

To export via the Measurements - georeferenced samples object

You can also export georeferenced sample data by adding a Measurements - georeferenced samples object from the Dataflow Toolbox.

Drag the Measurements - georeferenced samples exporter to the Dataflow window from the Dataflow Toolbox.
Right-click and select Exporter Properties dialog box and connect it to an acoustic variable of a supported data type from the Operands page.
Set the Export range in the Measurements - Georeferenced Samples page. Click OK.
Double-click Measurements - georeferenced samples object in the Dataflow view. Enter the export file name and click Save.

Output is *.points.csv or *.mb.points.csv depending on the input data.

Notes:

See also Cancel export.
For the georeferenced sample export for complex data output by ping, no data samples are not included in the export.
For the georeferenced sample export for complex data output by region, no data samples are included in the export.
Empty export files are often caused by missing or unsuitable GPS data.

Each line in the file is described by the .points.csv format.

3D points in Eonfusion

Exported Georeferenced Samples from a ME70 Multibeam echogram and a ME70 Single beam echogram from the middle beam in the fan displayed in Eonfusion.

School in Eonfusion

Exported Georeferenced Samples from multibeam pings in a ME70 echogram - Sv linked to scene slider and school revealed in Eonfusion.

Georeferenced samples as 3D points export files (*.points.csv)

The .points.csv format is used by:

the Echogram menu, Export, Georeferenced Sample, Whole Echogram... feature
the Echogram menu, Export, Georeferenced Samples, By Regions... feature
the Shortcut menu, Export Region, Georeferenced Samples... feature
the Shortcut menu, Export Selection, Georeferenced Samples... feature
the Measurements – georeferenced samples object in the Dataflow window feature

A *.points.csv file may include some or all of the following variables:

Variable

Description

Ping_index

Ping number

Note: In Echoview, pings are renumbered sequentially beginning with 0.

Beam_index

The beam index number.

Note: Only exported for multibeam data.

Latitude

The latitude (degrees) of the GPS antenna at the time the ping was transmitted.

Longitude

The longitude (degrees) of the GPS antenna at the time the ping was transmitted.

Altitude

Altitude of the sample in meters.

Depth

Depth of the sample in meters.

Depth is relative to the Z coordinate of the water level (relative to the platform system reference point) on the Position page of the Platform Properties dialog box.

Sample value

Sample value for the acoustic variable.

Includes complex and pulse compressed complex data types.

Sample value	File extension
Sv (dB re 1m-1)	.sv.points.csv .sv.mb.points.csv
TS (dB)	*.ts.points.csv
Angular position Minor (axis) in degrees Major (axis) in degree	.angles.points.csv .angles.mb.points.csv
Boolean Color Linear Power Unspecified dB	.boolean.points.csv .boolean.mb.points.csv .color.points.csv .color.mb.points.csv .linear.points.csv .power.points.csv .db.points.csv .db.mb.points.csv
Magnitude Phase	.mag.mb.points.csv .phase.mb.points.csv
Current velocity	*.currentvelocity.points.csv

Region ID

The ID number of the region.

This variable is output when the Echogram menu, Export, Georeferenced Samples, By Regions ... feature is used.

Notes:

Echoview does not include projection metadata (associated with the data) with the export. Any projection metadata should be recorded separately.
Analysis page Exclusions are applied to exported georeferenced data.

Exporting georeferenced samples

Georeferenced samples as 3D points export files (*.points.csv)

See also