I'm creating alternate history and I need to plot my modifications on actual maps.
I'm looking for an online tool (website) where you can add drawings on a base map with precision, zoom it in and out like you can on e.g. Google Maps and save it. (I don't want to work with maps as downloaded images because it would have to be very large files, that's why I'm looking an advice for an online tool.)
I mean something like e.g. Google My Maps, GmapGIS, Scribblemaps etc. but all these have some limitations so I’d appreciate knowing about other options.