Matthew Blissett wrote:
The documentation isn't particularly clear, but you can create the month chart using the search + facet API:
https://api.gbif.org/v1/occurrence/search?facet=month&facetLimit=12&limit=0
As an example, I looked at the flight time of Nymphalis antiopa, which is known to be around April-May and August-September. The GBIF Occurrences per Month chart <https://www.gbif.org/occurrence/charts?has_coordinate=true&has_geospatial_issue=false&taxon_key=5130682> shows a lot of occurrences in January. I tracked these down to Finish datasets with eventDate January 01 at 00:00 but for a valid year. In other words, these are year-only dates, spoiling the Occurrences per Month chart. How do I filter them out ? Is teventDate given in one or multiple database fields, with possble NULL values ? A work-around would be to give them month number 0. Regards, Adriaan van Os