When converting the file, OCTOPUS needs to identify which type of file is your ODV input file.
The SeaDataNet ODV files can be of 3 different types : Vertical Profile, trajectory or time series. The characteristics of these types are in the document format on pages 7-8 and summarized below:
Vertical profile: a file with primary variable = Z-coordinate increasing and date and time constant = to the date and time of the start of measurement
Time series: a file with a primary variable = TIME, increasing
Trajectory: a file with primary variable = Z-coordinate, and rows are ordered by increasing time (constant date on 2 consecutive lines are detected as errors)