Data format and field guide

Country time series are distributed as GeoParquet. The standard country schema has 20 columns for identifiers, time, geometry, provenance and confidence; global anchor-year GeoJSON files carry additional fields. Event tables are CSV.

Use unit_id for unit matching, date_precision to interpret dates, geom_origin to identify geometry provenance, and conf_grade as a quality indicator. Keep the src_name, src_url and related provenance fields when reusing data; they identify the source and its terms.