script to get updated ship_traffic from MarineCadastre?

[rsignell-usgs]

@jlstevens, I imagine there is a python script somewhere to download data from
https://marinecadastre.gov/ais/
and convert to the proper format for ingesting into the ship_track demo notebook?

[jlstevens]

It's been a while but I am fairly sure the data was already preprocessed by a third party: I don't ever remember running a script and I seem to remember having the data available from the very start of the project (unfortunately, I don't remember where from exactly!)

That said, the data isn't particularly hard to understand so I'm sure it wouldn't be too hard to write such a script.

Is there any particular reason you are trying to learn about how that data was generated?

[rsignell-usgs]

I'm a visiting scientist here for a month at NATO CMRE in Italy, and they are interested in modernizing their tools for working with AIS data!

I was just asking about a script because I had not found the example 2020 CSV data that the notebook is supposed to load.

So getting a data download script would kill two birds with one stone: allow me to update from 2020 to 2022, and show me what the expected CSV files are supposed to look like!

[rsignell-usgs]

OMG, I've been here before: #138. Let me take look at that thread and figure out the best course of action here.

[jlstevens]

Ah, and I see that issue mentions some of those details about where the data comes from that I had forgotten!

[rsignell-usgs]

Hmm, actually that thread seems just concerned with reading the already-existing parquet data files directly from cloud object storage rather than downloading them.

Still a mystery how the original data files were produced.

Which is a pity, since there is no data in those existing files from the Med. :(