search

tdwg / dwc-for-biologging

Darwin Core recommendations for biologging data
Creative Commons Attribution 4.0 International
13 stars 3 forks source link

Do we recommend measurementDeterminedDate for MOFs associated with occurrences #15

Open peterdesmet opened 4 years ago

peterdesmet commented 4 years ago

From the Mahoney use case: if a temperature measurement F53:deployment1:measurement1 in MOF is associated with an occurrence F53:deployment1:1902295519 and that occurrence has a precise eventDate = 2014-02-11 21:35:42.000+00:00. Do we recommend to then also repeat that eventDate as the measurementDeterminedDate of the MOF record?

/cc @pieterprovoost

pieterprovoost commented 4 years ago

@peterdesmet From the OBIS perspective there's no need to repeat the time. When we parse and index data in OBIS attributes such as time and location are inherited from parent records unless the information in the child record is more precise.

One could argue that repeating the time is useful in case someone accesses the Darwin Core Archive directly to work with the measurements, but some matching with the occurrences will need to happen anyway in order to get the coordinates (for which there are no fields in the measurements). So I would not recommend repeating time.

peterdesmet commented 4 years ago

Thanks @pieterprovoost. It will also lead to smaller data files and avoids consistency errors.