I was so excited to see this project as I was dreaming of such a thing, followed by immediate disappointment that west coast indigenous territories aren't included. Curious how what appears on the map or not is decided, is it just repackaging existing data sources? Are those sources editable by anyone (like OSM)?

Either way, good job! As a low key OSM contributor, this motivates me to contribute to the mapping, if data can be added by the public.