Get metrics from facets

[peterdesmet]

GBIF has just released occurrence facets (occ. counts for a certain aspect of the data). I just realized that we can potentially recreate all our metrics using those facets. For example, the coordinate bar could be recreated by running this call:

http://api.gbif.org/v1/occurrence/search?datasetKey=0debafd0-6c8a-11de-8225-b8a03c50a862&facet=issue&issue.facetLimit=200&facet=hasCoordinate&hasCoordinate.facetLimit=200&limit=0

... and then summing some counts to get the same meaningful categories we use.

That would mean we can run all metrics live! In addition we can create metrics for any aspect (not only datasets), such as species, countries, and live queries. Things that wouldn't scale with the backend we needed to have last year.

Some features still require a backend, such as the image preview or having one comprehensive metrics store (which we currently don't use), but have think the advantages of running live metrics outweigh those losses.

Thoughts?