Eye4Software Hydromagic

  Hydrographic Survey Software


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Importing sounding data

The ASCII import function in Hydromagic allows you to import soundings written in ASCII format.
For instance, to import a sounding exported from another Hydromagic project, or created with other software.

Import sounding data using the ASCII import function


Open the "Import ASCII Data" dialog

The dialog can be opened by selecting "File"=>"Import"=>"Import ASCII Data..." from the main menu.

Open the ASCII import function


Select input file

Click the "Browse..." button to select the file to be imported. All files will be displayed, there is no file extension filter applied.
Some file extensions that are commonly used for ASCII files include: *.ASC, *.TXT, *.LOG and *.CSV.

The imported file is never modified by this software. This dialog can also be used to import boundaries, matrices and waypoints.
Make sure the "Import data as" options is set to "Sounding" when you want to import soundings.

Select sounding as import data type


Field Separator

This value is set to "Auto" by default, which means that the software will try to detect which character is used to separate the fields in the ASCII file.
In most cases you do not have to adjust this value. Use only when the automatic setting does not work for you.

Select field separator for the file to be imported


Skipping lines and fields

In cases where the data does not start on the first line of the file (for instance, when header names are present),
you can skip these lines by increasing the "Number of lines to skip from start of file" setting.

The "Number of fields to skip from start of line" option can be used in cases where there are fields before the actual XYZ data, for instance, record id's.
You can use the "View" button to show the contents of the ASCII file to see whether these options apply to your input file.


Coordinate field order

This option is to set the order of the coordinate fields in the file.
The following settings are supported:

When a third field is present in the file, it will be interpreted as depths.
Most software stores soundings in XYZ format, so selecting "Easting, Northing" here would probably work in most cases.

Select coordinate axis order for the file to be imported


Coordinate field format

When the input files contains values in geographic format (i.e. latitude and longitude), and the coordinates are stored in degrees,
minutes and seconds format, or degrees and minutes format, set this option to the correct value.

When coordinates are stored in decimal values, leave the default "Decimal" option selected.

Select format of geographic coordinates for the file to be imported


Projection and Units

The software needs to now which projection is used in the file (only when Northing and Easting coordinates are used instead of Latitude and Longitude),
so it can be referenced to WGS84 coordinates. When altitude or depth values are present in the file, you also have to select the (vertical) units used.

Select coordinate reference system for the file to be imported


Importing the file

Just click "OK" to start processing the ASCII file. When all parameters were entered correctly, the imported sounding will appear in the "Project Explorer".