Every gazetteer the package uses is pinned to a source file, a version and a retrieval date, and the flag output records which reference produced it.
Value
A data frame with one row per layer: layer, source, file,
version, url, sha256, retrieved, licence.
Details
With reference = "OccurrenceCleaner" (the default of flag_occurrences()) the
package uses its own gazetteers built in data-raw/: capitals from the
CIA World Factbook and Natural Earth, province centroids, land, urban areas
and country polygons from Natural Earth (public domain), country centroids
from the CIA World Factbook, the thematicmapping.org World Borders Dataset
and the GEOLocate service, and
biodiversity institutions from GBIF's Global Registry of
Scientific Collections (GRSciColl), Wikidata, Wikipedia, GeoNames, BGCI
GardenSearch, Index Herbariorum and the GBIF registry, with every further
institution of CoordinateCleaner's table placed from Wikidata,
OpenStreetMap or GeoNames. With reference = "CoordinateCleaner" the
point gazetteers are read from the user's CoordinateCleaner installation
(countryref, institutions) and the polygon layers are downloaded through
rnaturalearth exactly as that package does, which gives its flags up to the
differences documented in flag_occurrences().