Eye4Software Hydromagic

  Hydrographic Survey Software

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Hydromagic Data window

The data window is used to display all incoming data from the hardware or simulators. The data window is integrated in the Hydromagic environment as a docked window. By default, it is displayed left of the map display. The following information can be displayed in this window:

Invalid, missing or unreliable data is displayed in red. When data has been received in the last three seconds and is valid, it will be displayed in green.

Hydromagic data window
Example data view window configuration

Showing or hiding the window

By default, the data window is displayed as a docked tabbed window. If you want to show or hide this window, just select the "Navigation Data" option from the "View" menu.

Show or hide the data window from the menu
Show or hide the data view window from the main menu.

Sometimes the windows is already displayed, but as a tabbed window.
You have to select the "Navigation Data" tab to bring the window to the foreground. This tabs look like the image below:

Data window Tab
Click the "Navigation Data" tab to activate the view.

Adjusting font size

When not all selected items fit in the window, you have to either remove some items or decrease the font size. It is not possible to use the scroll bar, since the view is updated all the time. There are three ways to adjust the font size: From the settings dialog (see below), using the font size buttons at the top of the dataview, or by selecting the window and using the mouse wheel together with the "CTRL" key on your keyboard. Adjust the font size so that all items fit the screen.

Use the font size buttons to fit all items in the window
Use the font size buttons to fit all items in the window.

Select items to display

You can easily modify the data window by showing and hiding items. By showing only the needed information, the display will become more well organized. To select the items to display, right-click on the data window to show the following dialog. You can just select the items to display, by checking them.

Select the items to be viewed in the data view
The data view window can be customized to your needs.

Position - Latitude / Longitude

Your current GNSS position in WGS84 latitude and longitude format (geographic coordinates). It is possible to change the coordinate display format used. The display format can be modified from in the "Units" tab in the preferences window ( "Preferences..." from the "Options" menu ).

Position - User Selected Grid

Your current GNSS position displayed as easting and northing coordinates. This projection is the same as the projection displayed in the status bar at the bottom of the screen (the projection selected at the time the Hydromagic project was created).


Altitude of your GNSS antenna. Depending on the GNSS or RTK settings, this can be the altitude above mean sea level (MSL), or the altitude above the WGS84 geoid (in most cases the latter). The altitude can be displayed in Meters or Feet. Which units is used depends on your project settings. Once a project has been created, you cannot use the vertical or horizontal units of measure. The GNSS altitude corrected with the antenna height (tide) can be displayed by selecting the "Tide" item into the data view window.


Displays both the low and high frequency (if applicable) depths returned by the echo sounder as well as the depths corrected with the current tide value (elevations). When the connected echo sounder does not have dual frequency capabilities, both the "Sounder Lo" and "Corrected Lo" values will remain invalid (red color).


Displays the current tide value. Depending on the settings, either the manual, RTK or tide receiver tide level will be displayed here. When RTK tides are used, this value is only accurate when the GNSS receiver has a RTK fixed position solution.


Heading or course calculated by the GNSS receiver or measured by a compass or gyro. Also known as course over ground. Depending on which heading sensor to use, true or magnetic heading will be displayed here. You can switch between heading modes from the "Calibration" tab in the "Preferences" window. This window can be opened by selecting the "Preferences" option from the "Options" menu at the top of the main screen.


Speed calculated by the GNSS receiver. Also known as speed over ground. The speed can be displayed in Miles per Hour, Meters per Second, Knots and Kilometers per Hour. The current speed unit setting can be modified from the "Units" tab in the preferences window ( "Preferences..." from the "Options" menu ).

GNSS Information

This option can be selected to retrieve more information on the GNSS fix. This section in the data window includes the quality of the GNSS fix (no fix, GNSS fix, SBAS fix, RTKL fix, etc...), the number of satellites used and some basic information on the DGPS/WAAS or EGNOS reference station used (not available when using EGNOS/WAAS/RTK).


Display motion information received from a motion sensor, IMU or echo sounder with built in motion or heave sensor. Enabling this option will display heave, roll and pitch information in the data view.

Sound velocity

When a sound velocity probe is used during the survey, the current speed of sound (sound velocity) will be displayed here. This display can be toggled between feet and meters per second from the "Units" tab in the preferences window ( "Preferences..." from the "Options" menu ).

Position Error

This items displays the estimated position error as calculated by your GNSS receiver. Please note that the NMEA0183 "GST" sentence needs to be enabled in your receivers firmware in order to receive this information.


This option can be selected to enable the DOP (Dilution Of Precision) section in the data window. It shows PDOP (overall dilution of precision or position dilution of precision), HDOP (horizontal dilution of precision) and VDOP (vertical dilution of precision). Low DOP values will result in low accuracy position information or loosing RTK fix.


This items is only populated with data when an autopilot is used. It shows the distance and bearing to the next waypoint.


Shows whether raw data recording is enabled or not, the raw data file name which is currently recording and the number of item in the raw data file. You can use this item to check if raw data is recording without issues.

Drone (USV/AUV)

Please note that this item is only available when an ArduPilot compatible autopilot is used (i.e. Cube, Pixhawk etc). You also need to load the "MavLink" plugin. When communication with the autopilot is established, you can monitor battery voltage and current, the next waypoint in the route, the autopilot mode and whether the motor(s) of the USV are armed.

Time (Local)

Displays the local time and date. For more information on how to change the date and/or time format, please have a look at the "System Settings" manual entry.

Time (UTC)

Displays the UTC time and date. For more information on how to change the date and/or time format, please have a look at the "System Settings" manual entry.


When you own an echo sounder which reports water temperature, or any other (supported) device capable of measuring and reporting water and/or air temperature, the current temperature is displayed here. Temperatures can be displayed in Celsius, Fahrenheit, Rankine or Kelvin units of measurement. To change the unit of measurement, go to the "Units" tab in the preferences window ( "Preferences..." from the "Options" menu ).