Inlet Charts

This project is intended to update several inlet charts, as well as automate the process for the future. The charts are visible at

• Annual averaged deep water properties for inlets
• Long term trends in deep water properties of BC inlets

The backing data can be found at the waterproperties archive and can be downloaded to data/ for offline access:

$ wget -m -np --cut-dirs=2 -P data https://www.waterproperties.ca/osd_data_archive/

Inlet polygons defined using https://geojson.io

Dependencies

This project depends on (at least)

• python version 3.9 or later
• poetry
• a C compiler
• python development headers (python-dev or equivalent)

Once those are installed, you can run

$ poetry install --no-dev

to get all the rest of the dependencies. To get dependencies which are useful for development, simply run

$ poetry install

instead.

Usage

To get temperature, salinity, and dissovled oxygen plots of all the inlets defined in inlets.geojson, run

$ poetry run plot

To get monthly averages for temperature, salinity, and dissolved oxygen for all inlets, run

$ poetry run plot -a

To get annual plots for all inlets, run

$ poetry run plot -A

GeoJSON Properties

When adding water bodies, certain property keys are picked up and added to the python object to influence its behaviour:

• "name": Used as an identifier for the data, in plot titles, file names, sqlite tables, and for filtering. Required. Example: "name": "Saanich Inlet"
• "area": Used to group inlets together for aggregate plots like the annual averages and annual anomalies charts. Required. Example: "area": "Salish Sea"
• "boundaries": Used to define the three depth categories for the deep water plots. Required. Example: "boundaries": "[250, 350, 450]"
• "shallow boundaries": Used to define the two depth categories for the shallow water plots, defaults to [0, 30, 100]. Example: "shallow boundaries": "[0, 30, 100]"
• "limits": Used to define view limits for T, S, O charts, broken out by "deep" and "shallow". An empty list disables the feature. Example: "limits": { "oxygen": { "deep": [0, 5], "shallow": [] } }
• "seasons": Used to define the seasons for seasonal trend removal charts. Expected to be the numbers 1..12 separated into a number of lists. Example: "seasons": [[1, 2, 3], [4, 5], [6, 7, 8, 9], [10, 11, 12]]