Do these maps work with Roll20/Foundry/XXX virtual tabletop?
You can import the JPG files into any system you use to play your games online, however, if you want to use the .mod file with the grid and line of sight data you will need to use Fantasy Grounds Unity.
How do I use the .mod File?
I like your maps!
Not really a question but… you can support me on my Patreon (Patreon.com/angelamaps) and get a large library of maps (including this one) and new maps every month.