nielshintzen
commented
8 years ago Hi Cristina,
The merging function takes indeed FT_REF and the start-end time of the trip to link VMS, not the catch date. One can later on choose to use the splitAmongPings function to distribute the catches over the pings. This function can use a reference column, such as the time each VMS ping represents (pings with higher time associated will get a larger share). Similarly, if you have points at which it is more likely to catch fish, then make sure this indicator-column is used with this information per ping in it.
Hope this helps!
Niels
From: csilva53 [mailto:notifications@github.com] Sent: woensdag 10 augustus 2016 11:30 To: nielshintzen/vmstools Subject: [nielshintzen/vmstools] Linking logbooks and vms (#10)
I have checked the code of mergeEflalo2Tacsat and, as far as I undertood, the coupling is performed using the fishing trip reference (FT_REF) and date (LE_CDAT). I assume that the catches are distributed by the VMS pings according to the time assigned to each ping. Have you consider the allocation of catches by haul instead of date of catch? This is important when some species are mainly caught e.g. during the night or in a specific depth range.
Cristina
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csilva53
I have checked the code of mergeEflalo2Tacsat and, as far as I undertood, the coupling is performed using the fishing trip reference (FT_REF) and date (LE_CDAT). I assume that the catches are distributed by the VMS pings according to the time assigned to each ping. Have you consider the allocation of catches by haul instead of date of catch? This is important when some species are mainly caught e.g. during the night or in a specific depth range.
Cristina