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EMODnet / esas2obis

Darwin Core mapping of ESAS data for publication to OBIS
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Coordinates in observation.notes #9

Closed peterdesmet closed 2 years ago

peterdesmet commented 2 years ago

@nicolasvanermen in the observation notes I find a lot of values that look like coordinates, e.g 8.1300000000. What is the intention of these values?

nicolasvanermen commented 2 years ago

No idea, maybe Eric knows, I will ask him... but does this matter?

On Fri, Mar 18, 2022 at 12:47 PM Peter Desmet @.***> wrote:

@nicolasvanermen https://github.com/nicolasvanermen in the observation notes I find a lot of values that look like coordinates, e.g 8.1300000000. What is the intention of these values?

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peterdesmet commented 2 years ago

@ericstienen any idea why coordinates are sometimes written in the notes of an ESAS observation? Notes include a variety of values that are often hard to interpret:

...
JADE RIVER
MOSSELKWEEK
TTB - C2
11.5000000000
12.2500000000
12.3500000000
270° 150M
270° 250M
...
EricStienen commented 2 years ago

Seems relevant info on place where a bird was seen (e.g. cormorant in association with mosselkweek) or tern sitting on buoy/turbine named TTB-C2.

270° 150m gives the position of a vessel or a seamammal relative to the position of the observation vessel. Used very often and relevant!

peterdesmet commented 2 years ago

Thanks @EricStienen, but what about single values like 11.5000000000? Are those coordinates?

EricStienen commented 2 years ago

looks like time stamps. To what euring code do notes like 11.500000 belong to?

peterdesmet commented 2 years ago

Codes for that one:

30 6020 6340 6360

EricStienen commented 2 years ago

does not immedaitely ring a bell. I have to see the entire line including date, time and behaviour. Maybe that will help.

peterdesmet commented 2 years ago

Here's all the data for those records: notes.csv

EricStienen commented 2 years ago

indeed these are time stamps. Such was done in the early days when bouts for counting lasted 10 minutes. Rather imprecise if you wanted to know if a bird was positioned above a sandbank or not. In the orginal notes these time stamps look like 10:10 but somwhre in the process that has become 10.10000000. Do not ask me why.