Note:
The *.inv files in data/1-data/metadata are ASCII text files created by
NODC personnel that contain information that was used within NODC to
populate a now-obsolete metadata database. These files are maintained
because they were part of the original .zip file received at NODC. The
metadata elements in this string are separated by a semicolon.

The string elements are:
NODC accession number [default value is 0000001, not usually modified];
NODC file alias [discontinued for new data in approximately January 2000];
originator cruise identifier;
NODC project code;
NODC institution code (data collecting institution);
NODC platform code;
earliest observation date (YYYY/MM/DD);
latest observation date (YYYY/MM/DD);
number of stations in this file;
number of records [default is blank, discontinued for new data in approximately January 2000];
NODC reference number [default is blank];
approximate southernmost bounding latitude (- is South, units are degrees and minutes);
approximate northernmost bounding latitude (- is South, units are degrees and minutes);
approximate westernmost bounding latitude (- is West, units are degrees and minutes);
approximate easternmost bounding latitude (- is West, units are degrees and minutes);
approximate instrument depth;
maximum length of originators record string;