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AndreaNOdell / hake_growth

Spatiotemporal variation in weight-at-age and its impact on fisheries management
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Multiple columns with date information - which to use? #2

Closed AndreaNOdell closed 2 years ago

AndreaNOdell commented 2 years ago

In the raw dataset, there are a number of columns that seem to include information on dates relevant to the fish individual collected. Column names include "catch_modified_date", "eq_date", "hb_date", and "specimen_modified_date". I am currently using "eq_date" as that seemed to have the most complete information. Similarly, there is "eq_long", "eq_lat", and "hb_long", "hb_lat". What does eq and hb stand for?

AndreaNOdell commented 2 years ago

I found the metadata information!

kristinmarshall-NOAA commented 2 years ago

Great! Did the metadata solve the date question, or do we still need help from the acoustics team to decipher?

AndreaNOdell commented 2 years ago

I do believe so! I know what each date means now (eq_date = date when target depth was called; hb_date = date when haul back was called). Not 100% sure what haul back is, but the dates seem to be the same between the two. There are slight differences in the lat/long coordinates though (perhaps negligible?).

kristinmarshall-NOAA commented 2 years ago

I believe haul back is when they pull the net back in, so that might be the most accurate. It doesn't seem to matter for the date, like you say, but may have small differences for the coordinates.