I'm not sure but id say it was made by Joaquín de Salas Vara de Rey for Hisatlas. He has made a very nice collection of maps but sadly hidden behind a paywallCan anyone help me identify the author/original site of this map? I've seen others that are similar to it on AH.com but I haven't seen a direct attribution and before I mod it I want to at least try due diligence!
Thank you--that does look probable! Probably reposted by someone with full access, then, given the higher resolution. Good to know for future work!