The per-station coverage card: n obs by dataset x year and by dataset x month, for one station

What db-viz-station draws when a station is clicked — every dataset sampled there, its rows per year (years: [[year, n], …]) and per month (months: twelve counts) — for all 218 stations. Kept out of coverage.json so the first paint stays small; fetched when a station is selected.

Usage

build_coverage_stations(con, version)

Arguments

con

DuckDB connection holding obs (with dataset_key, grid_key, datetime, taxon_key, life_stage) and sample_root; taxon (for taxa[]) and measurement_type (for the two variable fields) when present.

version

the release version string.

Value

A list {version, stations: [{grid_key, datasets: [{dataset_key, n_obs, year_min, year_max, years, months}]}]}.