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CS SA: Information on source and quality of total weight needed #202

Open nmprista opened 8 months ago

nmprista commented 8 months ago

In some of programmes the total weights declared in the SA table are the result of direct observations. In other, they are reported by the fishermen. In other they are collected from logbooks or sales. Sometimes, these mix in a single programme, e.g., when data from original source are missing, it may be possible to get it from another source (when observers fail to record the landings of a certain species, they sometimes ask the skipper the value).

In the model there is a variable SAsampler. It is ambiguous what it applies to: is it who estimates the totalweight? or who took the sampleWeight? This needs to be clarified because we collect these 2 types of information in each row.

Irrespective of who took the sample, an indicator SAsourceTotalWeight with a code list like "Observer", "Logbooks", "Fishermen", "Unknown", ... would be important to distinguish these cases, complemented it with already existing quality indicator (https://vocab.ices.dk/?codetypeguid=e08ec685-61f6-4ccb-9e93-594047b05797)

HenrikK-N commented 8 months ago

We discussed this, but the main point is to agree on how many fields should have a 'quality' field like the SAsourceTotalWeight. Adding SAsourceTotalWeight could open for many other 'quality' fields for many measured fields. Since there are different sources for the different fields; TotalWeight, area, metier, etc. there could be one data source field for the combined fields with codes like: Logbook data, according sampler, observer, self-sampling, mixed sources.