Import P1/90 Bathymetry File(s)

Use the Moving Platform Gravity > Import > Import P1/90 Bathymetry File(s) menu option (geogxnet.dll(Geosoft.GX.Gravity.ImportP190;Run)*) to import multiple P1/90 bathymetry files into the current Geosoft database.

Import P1/90 Bathymetry File(s) dialog options

Input file(s)

Specify the bathymetry input files separated by the | symbol. You can also browse to select multiple files. Script Parameter: IMPORT_P190.FILE

Application Notes

You can select multiple input bathymetry files. Each file is imported as a database line. The line name is set to the input file name.

If a current database does not exist, you are prompted to create one first. The default settings of Create a database should be adequate.

The P1-90 format is very comprehensive, allowing for a multitude of data types. A metafile format description can be found in the SEG technical standard document: SEG-UKOOA Ancillary Data Standard.

Additional channels computed on the fly:

• The header of the P1/90 files contains the projection information. Once the data is imported the projected X & Y are computed from the Latitude and Longitude and saved in the database.
• The Projection information and Units found in the header are assigned to the output database.
• The Header Survey date is combined with the Julian day to generate the Date channel.
• The date and time are combined to generate a single channel, named DateTime. This channel can be used as a unique ID channel throughout the survey.
• The bathymetry data in the P1-90 files is positive down. It is multiplied it by -1 to make the axis positive up, and saved as the Elevation channel.