Exporting positions
GPS fixes
GPS fixes can be exported from position GPS fixes variables to a .gps.csv file or to an Echoview Data File Format file (.evd).
To export positions:
- Display the cruise track for a position variable.
- On the Cruise Track menu, click Export Data... or Export to Echoview Data File Format...
- OR -
- Display the position GPS fixes table.
- On the Table menu, click Export Data... or Export to Echoview Data File Format...
GPS fixes export files (.gps.csv)
The first line of the .csv file lists the variables that are exported (these will be used as column headings if the file is loaded into a spreadsheet program). Each subsequent line contains the value for each variable for a single GPS fix.
The following data are exported.
|
Variable |
Description |
|
GPS_fix |
A sequential fix number (Optional data*) |
|
GPS_date |
yyyy-MM-dd |
|
GPS_time |
HH:mm:ss |
|
GPS_milliseconds |
ms |
|
Latitude |
degrees |
|
Longitude |
degrees |
|
NMEA |
altitude data (Simrad files only) or any NMEA GPS-fix letter groups identified by Echoview (Optional data*) |
|
GPS_status |
GPS fix status, (Optional data) as follows:
0 = Good |
|
GPS_filename |
Name of the data file from which the GPS fix is sourced.(Optional data) Note: This will be blank for GPS fixes exported from a virtual variable. |
|
Distance |
Calculated distance (nmi) between the fix and the last fix. |
Notes:
- Files in this format (.gps.csv) can be added into an EV file and read by Echoview as a raw variable.*Optional data is ignored when the export file is added to a fileset.
- The latitude/longitude location exported is for the GPS antenna, not the transducer. Refer to About transducer geometry and the Position page of the Platform Properties dialog box for more information.
See also
Export file formats
GPS fixes
Processing GPS data
About Tables
Text data files
Raw variables derived from text data files