Based on the RabbitSlayeru's Inkarnate map (itself based on the Ortelius map) he kindly shared publicly and which can be found here: https://inkarnate.com/m/4ErXw3--the-continent/

My version has been edited, corrected and completed according to The Witcher books, mostly.

You can find the final versions, edited in Photoshop, on my Reddit profile: https://www.reddit.com/user/nolankotulan