The National Library of Scotland is offering a free online workshop – Re-Using Georeferenced Maps on Monday 24 January 2022 at noon ET (17.00 GMT. Further details and booking via Eventbrite. I recommend booking your place early.
Also online from NLS, a Guide to re-using georeferenced maps.
I attended one of their previous lectures. It was fabulous. I recommend this one to anyone who uses maps for genealogy.