Are sensor data exported from movebank always sorted by timestamp?

tdwg / dwc-for-biologging

Darwin Core recommendations for biologging data

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Are sensor data exported from movebank always sorted by timestamp? #31

Closed peterdesmet closed 3 years ago

peterdesmet commented 3 years ago

@sarahcd can we assume that sensor data exported from Movebank are always sorted by timestamp? This would cut down on processing for Darwin Core.

sarahcd commented 3 years ago

yes, by ID and by timestamp, I can't think of any exceptions.

peterdesmet commented 3 years ago

What ID exactly?

sarahcd commented 3 years ago

update: Event data downloaded from Movebank are ordered by tag_id, deploy_on_timestamp, deployment_id, and by timestamp within each of those groups. The tag_id and deployment_id are internal database identifiers rather than user-assigned identifiers, so it's not very useful. If you have suggestions of other ordering that would work well for DwC processing, let me know and I can discuss possible updates with our team.

peterdesmet commented 3 years ago

Ok, good. Most important aspect is that records are sorted chronologically by timestamp within those groups, so we don't have to resort when transforming for DwC (see e0909dd).