As far as I know, GADM is the system that's been used in the past to
organize such boundaries, which is a low/no cost solution that has some
challenges. The data are crosschecked with ISO-3166-2 codes. There may be
newer systems, but I am not aware of updates to this.
On Mon, Dec 2, 2019 at 1:07 PM Gerald Souder <mickhead23@xxxxxxx> wrote:
Hi, question for eBird users please, is anyone knowledgeable about how
they (Cornell Lab/eBird) get their map data? I’m referring to source(s) of
data for things like geographical boundaries, county/state boundaries,
natural resources, roads, etc., not data products like species maps or
I searched and couldn’t find any information so thought I’d ask here. My
email address is mickhead23@xxxxxxx.